Physics Questions and Answers November 11, 2022

A small object with mass 4.05 kg moves counterclockwise with constant angular speed 1.70rad/s in a circle of radius 3.35 m entered at the origin. It starts at the point with position vector 3.35m. Then it undergoes an angular displacement of 8.95 rad. (a) What is its new position vector? (b) In what quadrant is the object located and what angle

A stick is resting on a concrete step with of its total length L hanging over the edge. A single ladybug lands on the end of the stick hanging over the edge, and the stick begins to tip. A moment later, a second, identical ladybug lands on the other end of the stick, which results in the stick coming momentarily to rest at 0 67.3 with respect to

(a) What is the recoil velocity of the carriage? (b) What is the average force acting to stop the carriage? (c) If the force stopping it is due to a spring, what is the spring constant of the spring? (d) What is the maximum force this spring exerts? The user would feel this force on their shoulder. (e) Now let's see what it would be like without

(20 points) To reduce recoil, many modern rifles are equipped with a recoil mechanism. That is, the portion of the rifle which acts acts against the force of the expanding gases which propels the bullet is allowed to slide in a carriage relative to the rest of the gun. Lets say this carriage has a mass of 1.5 kg and is allowed to slide over a

Admple Homework MB 30 MA ZZZZZ MA30 kg MB 10kg 20 VA0 Determine the acceleration of wedge, and the block relative to wedge. aBIA P

(a) Find the speed of the box just before it reaches Alicia. (b) Alicia catches the box successfully, and now they are both moving with the same speed (note: this is an inelastic collision). What is the speed of Alicia and the block just after she catches it? (Note: since it is immediately after she catches the block, friction still has not yet

Alicia, who has a mass of mA 70 kg, works at recieving in a warehouse. A box of mass mp 40 kg is being dropped from rest from the top of a frictionless ramp of height 3 m. She plans on catching the box when it reaches her. Starting where Alicia is standing, the coefficient of kinetic friction is p0.8. mg 40 kg h 3m mA 70 kg Hk 0.8

Starting from rest, a 68.0 kg woman jumps down to the floor from a height of 0,630 m, and immediately jumps back up into the air. While she is in contact with the ground during the time interval 0 t 0.800 s, the force she exerts on the floor can be modeled using the function F9,200r11,500 where F is in newtons and t is in seconds. (a) What

You are on an unknown planet and want to know what its freefall acceleration is. You hang a spring (L40 cm) from the ceiling and find that hanging a mass of 200 g from it stretches the spring by 31.2 cm. When you pull the mass down 10 cm and release it, you observe that 10 oscillations take 14.5 s. What is the unknown g

An oil refinery uses a Venturi tube to measure the flow rate of gasoline. The density of the gasoline is p 7.60 x 10 kgm, the inlet and outlet tubes, respectively, have a radius of 3.50 cm and 1.75 cm, and the difference P 1.20 kPa. in input and output pressure is P 1 P P (a) Find the speed (in ms) of the gasoline as it leaves the hose. ms (b)

A space probe is to be put into a circular orbit of radius 36.0 km about an asteroid. At this radius the magnitude of the gravitational acceleration, normally referred to as the gravitational field, is 0.00280 meters per second squared. What speed, in meters per second, must the probe be given relative to the asteroid for this orbit to be achieved

A light balloon is filled with 373 m of helium at atmospheric pressure. Densities of Some Common Substances at Standard Temperature (0C) and Pressure (Atmospheric) Substance Air Aluminum Benzene Copper Ethyl alcohol Fresh water Glycerin Gold Helium gas Hydrogen gas p(kgm) 1.29 2.70 X 103 0.879 X 10 8.92 x 10 0.806 X 103 1.00 10 1.26 X 10 19.3 X

Water flows in a vertically downward stream from a 0.800 cm diameter faucet filling a 125 cm3 container in 18.0 s. Determine the diameter (in cm ) of the stream of water a distance L=13.0 cm below the faucet opening?

A horizontal force of 150 N is used to push a 36.0 kg packing crate a distance of 6.95 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150 N force (b) the coefficient of kinetic friction between the crate and the surface,A horizontal force of 150 N is used to push a 36.0

1. Find the following limits e1x x (b) lim xe Ie (a) lim x0 (c) lim (csc xcot x) x0 (d) lim (12x) x0 (e) lim x0 xx (f) lim (sin x)ln sin x x0

A long solenoid that has 1 130 turns uniformly distributed over a length of 0.380 m produces a magnetic field of magnitude 1.00 x 104 T at its center. What current is required in the windings for that to occur mA

(a) Calculate the magnitude of the magnetic field at point P, located at the center of the square of edge length l=0.200m. (b) Determine the direction of the magnetic field at point P, located at the center of the square of edge length l=0.200m.

Four long, parallel conductors carry equal currents of I 6.20 A. The figure below is an end view of the conductors. The current direction is into the page at points A and B and out of the page at C and D. 11 B C

A glass optical fiber is used to transport a light ray across a long distance. The fiber has an index of refraction of 1.550 and is submerged in water, which has an index of refraction of 1.333 . What is the critical angle (in degrees) for the light ray to remain inside the fiber?

Write the equation of uniform motion for the given values. xo 10, v 2ms. Find x at t 2.0 (s).

A person throws a ball downwards. It leaves there hand with a velocity of 2.0 m/s, and accelerates because of gravity. How long will it take the ball to reach a speed of 9.0 m/s? (g = 9.81 m/s2 )

The electric flux through a squareshaped area of side 3.5 cm near a large charged sheet is found to be 3.6 x 107 N mC when the area is parallel to the plate. What is the charge density on the sheet Hint The charge density on the sheet is o pCm.

(pints) A ball is thrown horisontally off the top of a high cliff. In the abones of sir resistance, the vertical distance the all tre is the f depends on the height of the ball. depends on the size of the ball, is always the same. depends on the mass of the ball. depends on the speed at which it was thrown. Question 2 (6 points) A stock person at

two vectors A ai 2jk and B 2ij4k are given. If A B 4, determine A a) 2, b)1, c)0, d)4, e)3, f)5

A pilot of mass m a 79 kg in a jet aircraft executes a loop theloop In the maneouvre, the aircraft moves in a vertical circle R 4.0 km at a constant speed of of v 299 ms. Determine the force exerted (in units of N) by the seat of the pilot at the bottom of the loop (take g 9.8MS2). a) 991 b) 774) c 2539, d 217, e 1765),

What is Ic. the moment of inertia of the disk around its center of mass You should know this formula well. Express your answer in terms of given variables. ,If you use this disk as a pendulum bob, what is T (d), the period of the pendulum, if the axis is a distance d from the center of mass of the disk Express the period of the pendulum in terms

You want to produce three 2.00mmdiameter cylindrical wires, each with a resistance of 3.00 12 at room temperature. One wire is gold (Pg2.44 x 102m). one is copper (p. 1.72 x 102m), and one is aluminum (Pa2.75 x 108m).,What will be the length of the gold wire Express your answer with the appropriate units. L Value Submit X Incorrect Try Again Part

Two vectors A ai25k and B2ij 4k are given. If AB4, determine a 02 01 00 3

The intensity of your puppys whines varies from Isoft 4 x 108 Wm to Iloud 1 x 104 Wm. (a) What is the dB level difference between the puppys loud and soft whines AB PloudPsoft (b) What are the actual dB levels of the soft and loud whines Psoft Ploud ,The intensity of your puppys whines varies from Isoft 4 x 108 Wm to Iloud 1 x 104 Wm. (a)

A) find the position of the final image of the 2.0 cm tall object. B) Find the size of the final image of the 2.0 cm tall object. Express your answer in centimeters to two significant figures. C) Find the orientation of the final image of the 2.0 cm tall object.

2.0 cm 14 36 cm f 9.0 cm 15 cm

A person on horseback is on a drawbridge which is at an angle 8 20.0 above the horizontal, as shown in the figure. The center of mass of the personhorse system is d 1.00 m from the end of the bridge. The bridge is 6.91 m long and has a mass of 2.020 kg. A cable is attached to the bridge 5.00 m from the hinge and to a point on the wall h 12.0 m

1. Compute the moment of inertia of uniform disk spinning about its center . 2. Explain the Cavendish experiment for gravitation and how to compute the energy required to lift a mass m2 off a mass m1 starting from a distance R to infinity.

You are waiting for the bus when you notice Christopher Lloyd and Michael J. Fox down the street. They are travelling on hoverboards at a speed of (9.0 ms) towards you with Christopher in front of Michael. The two of them seem to be doing some sort of science experiment as they are each carrying a sound generator that is set to the same frequency.

1. (problem) Imagine a Black Panther figure (mass 220 grams) is hanging vertically while being pulled at its center of mass by a series of strings attached to the center of mass of the figure. String 1 has a force of 5.0 Newtons pulling directly to the left. String 2 is being pulled 10 degrees left of vertical by a force of 4.0 Newton. a. At what

Two moving charged particles exert forces on each other because each one creates a magnetic field in which the other moves. The magnetic field B at r created by a charged particle q at r with velocity v is given by Hog1 V (rr) 4 rr B (r) where is the physical constant known as permeability of vacuum. Are the forces between two moving charges, q

. For the central force field (conservative), we have seen that when we define u the equations of conservation of angular momentum and energy combine to give us a differential r equation du do ud V t du (1) is the azimuthal (or angular) coordinate, u U is the reduced mass, t where the central potential. If the particle in this potential describes

A long solenoid with n turns per unit length carrying current l and a radius R, with its axis along the zaxis. Assume that now two cylinders, one with charge Q radius a R, are inserted inside and outside the solenoid, respectively. a) Find the electric and magnetic field everywhere.,b) Find the linear momentum in the region in the region a r R.

A metal has a work function of 2.3 eV. When light of frequency 5.6 x 104 Hz is incident on the metal, electrons are ejected with a maximum kinetic energy of 1.2 eV. (a) Calculate the threshold frequency of the metal. (b) Calculate the energy of the incident photons. (c) Calculate the minimum energy required to eject an electron from the metal. (d)

In an engine, ( ) energy is converted into mechanical energy. In a compressed steam refrigeration cycle, the working mediun ) (filling absorbs or releases) heat in the evaporator. Steam power plants generally include four parts ( ) and feedwater pumps. ),( 1 MPa ( ) bar. If the entropy S is 10 JK, S is 20 JK, the temperature T is 300 K, the

Figure 3. Question 10 (5 points) Please refer to Figure 3, which shows the pattern of interference fringes for light of wavelength 543 nm passing through two narrow slits, projected onto a screen a distance of 2.43 m away. The distance on the screen between the centers of two adjacent bright fringes is 1.01 cm. What is the distance between the two

DATA Price name state location 82.051.001.001.00 83.131.001.001.00 83.431.001.001.00 83.611.001.001.00 83.201.001.001.00 81.211.001.002.00 80.291.001.002.00 80.881.001.002.00 81.711.001.002.00 81.921.001.002.00 78.221.002.001.00 78.861.002.001.00 80.491.002.001.00 82.111.002.001.00 82.631.002.001.00 83.891.002.002.00 91.651.002.002.00

The dataset (attached in table form below) is a basic items from grocery section of 4 different hypermarkets in Malaysia (Giant 1, Tesco 2, Aeon 3, Mydin 4). Data were collected from three different states (Selangor 1, Penang 2, Pahang 3) and from Metropolitans (1) and other places (2). You are appointed as a senior consultant of Ministry of

What varies between two tones that are different in timbre, that is, two tones that have the same fundamental frequency but are produced, say, by different musical instruments? Note that the graphs B and C in (Figure 1) could represent tones with different timbre.

P 0 A Afh B C

(2) Try to draw the following processes of ideal gas passing through point 1 on the given parameter pv and Ts coordinate maps constant pressure process (n0), constant temperature process (n1), constant entropy process (n k) and constant volume process (no). Mark accordingly. on the diagram. T S

for a pair of charged particles, how does the magnitude of the electric force between them change? (a) if the charge of one particle is doubled? (b) if the distance between them is doubled?

State if following statements are true or false

1) Heat can not be transferred from a lower temperature to a higher one. ( ) 2) When gas absorbs heat, its temperature must rise. ( 3) The cooling coefficient may be greater than 1. ( ) Enthalpy is a state parameter. ( ) ) Usually, the thermal conductivities of liquids are higher than those of gases. ( ) O Heat conduction only occurs in solids. (

A certain sound is recorded by a microphone. The same microphone then detects a second sound, which is identical to the first one except that it has twice the frequency. In addition to the higher frequency, what distinguishes the second sound from the first one? It is perceived as higher in pitch. It is perceived as louder. It has a higher

In front of a spherical concave mirror of radius 29.3 cm, you position an object of height 3.82 cm somewhere along the principal axis. The resultant image has a height of 10.70 cm. How far from the mirror is the object located 11.9 cm 19.9 cm 6.0 cm 23.9 cm

(4) Given h200 W(mK), h 100 W(m K), ,, 120 C, 1,2 20 C, 81 m, 10.985 W(m K), A 200 m. Find the overall heattransfer coefficient, thermal resistance per area and total heat transfer rate. Hist fwl

If you have an unknown cylinder of some metal, is there a way to determine its mass using only this experimental apparatus? (just meter stick with a known mass, no additional weights). Assuming the cylinder has a height of 84.8 0.1 mm, a diameter of 19.12 0.1 mm, and a density of 2.7 103 kg/m3 , with a meter stick that weights 0.1 kg, find a

T3(The Old Pipe and the Sea): An old, half-broken pump drives seawater into a boardwalk water-ride at a rate of0.015m^3/s.The water begins its journey in a vertical pipe of radius0.03811m at a pressure of1.47atm. The pipe is then joins another vertical section which has a narrower radius. After climbing a total of5.2m,the water exits an open

Figure 2 120.3 cm 64.8 cm 92.5 cm 37.0 cm Mirror Question 4 (5 points) Please refer to Figure 2. A light beam shines through air and then strikes a mirror, making an angle theta 62.3 degrees with respect to the vertical, as shown. The reflected beam then strikes a pane of glass of thickness h 1.17 cm, located a distance y 48.1 cm from the

Consider a meter stick of 150 g that has pivot point at point O, which is at the location of 25 cm mark. There is a hanging weight of mass 200 g at 60 cm mark. There is a clamp at 90 cm mark which supports the meter stick upward such that meter stick is in static equilibrium. (a) Identify how many forces are acting on the meter stick with their

A proton located at the origin is accelerated in the y direction for a brief time. (a) How much time passes before a detector located at 0.3, 0, 0 m detects a radiative electric field 5 (b) What is the direction of the radiative electric field observed at this location Select (c) If the accelerated particle had been an electron instead of a

An accelerated electron An electron is initially at rest. At time t0 it is accelerated upward with an acceleration of a 1 x 108 ms for a very short time (this large acceleration is possible because the electron has a very small mass). We make observations at location A. x 15 meters from the electron (see the figure). Electron .......... (a) At

Four resistors are arranged in a circuit, as shown. There is a constant voltage Vacross the voltage source. The current is 0.25 ampere. (a) Find the equivalent resistance of the four resistors. (b) Find the voltage Vacross the voltage source. (c) Find the voltage across resistor R. (d) Find the power dissipated by resistor R. V I R, 160 Piz 60

A2.0kg mass is at rest on the surface of a frictionless table. Another mass collides elastically in1D with the2.0kg mass. After the collision the2.0kg mass moves at2.0m/s. If the second mass has a mass of1.0kg,what was its initial speed? Question9options: 2.0m/s 1.5m/s 3.0m/s 1.0 m/s

An unstable particle D is flying at a velocity of 0.75c relative to the laboratorys positive x coordinate. It decays, emitting a 7meson (pion). The pion is observed to move at a velocity of 0.90c in the direction of the negative y coordinate in the laboratory frame of reference. Calculate the velocity of the pion and its and y components in the

(a) Show that the optical and acoustic phonon bands for a one-dimensional Bravais lattice with a basis of two atoms reduce to one acoustic band when the atomic masses are identical. (b) Are the number of modes in each band the same? Explain why.

determine the correct heat flow diagram for the three little pigs house and calculate the total rate of heat flow out of the house. You will then analyse a circuit diagram and calculate the electric currents in a parallel circuit. The details of the three little pigss house The walls are made of 10cm thick bricks, Insulated with 5 cm of

The figure below shows three small, charged spheres at the corners of an equilateral triangle. Sphere A has a charge of 1.60 C B has a charge of 5.40 C and C has a charge of 5.16 UC. Each side of the triangle is 0.500 m long. What are the magnitude and direction of the net electric force on A (Enter the magnitude in N and the direction in degrees

A 4096x4096 (4kx4k) CCD camera is placed at the focal plane of a tele scope with an aperture of 508 mm and a focal ratio of f8.0. Each pixel is square with 9pm on a side. What is the focal length of the telescope, and calculate the plate scale, the number of arc seconds per pixel, and the field of view of the CCD. If the seeing is typically 2, how

Two long, parallel wires carry currents of I 3.30 A and I 4.50 A in the directions indicated in the figure below, where d 22.5 cm. (Take the positive x direction to be to the right.) (a) Find the magnitude and direction of the magnetic field at point P, located d 22.5 cm above the wire carrying the 4.50A current. magnitude HT direction

The relationship between angular frequency and wavenumber for a deep water wave is gk where g is the acceleration due to gravity. If the phase velocity of a particular wave is 7.7 ms what is the group velocity of the wave w

What is output F in terms of A and B if GI has a fault of (i) AND Bridge between the inputs. (ii) OR Bridge between the inputs. (1) F=B' (ii) F=A'B'

The maximum range of a field gun is 2000m. If a target at a distance of 1200m is to be hit, what should be the angle of projection?

A lens forms a real image that is 234 cm away from the object and 12 times its length., Part A What kind of lens is this O converging O diverging Submit Part B Request Answer What is its focal length Express your answer with the appropriate units. f HA Value I Trita

1. A and B are two operators, such that A, B c, where c is a number. (a) Show that, e BeBc B nc A(n1). Hint First show that A, Then show that e4, B ce. (b) Use the above result to show that eA Bn eA (B c) (c) Use the above result again to show that e e eA A B B ece (d) The above result can be used to prove (You must show) e A e(AB) eA

ignal v(t) is given as, v(t) 5 818 2 j e (jnnt) n v(t) Illustrate the frequency spectrum of the v(t) in terms of Complex Exponential Fourier Series up to the 2nd harmonics. 5. Express v(t) in terms of Trigonometriccosine form Fourier Series up to the 2nd harmonics. c. Illustrate the frequency spectrum of the v(t) in terms of Trigonometriccosine

A certain transverse wave is described by y(x, t) B cos 2 (7 ), where B 5.40 mm, L 30.0 cm, and 3.2010 s. Part A Determine the waves amplitude. Express your answer in meters. A Submit Part B Determine the waves wavelength. Express your answer in meters. Submit Part C f Submit IVE Part D Request Answer Determine the waves frequency.

The figure below shows a horizontal pipe with a varying cross section. A liquid with a density of 1.65 gcm3 flows from left to right in the pipe, from larger to smaller cross section. The left sides crosssectional area is 10.0 cm2, and while on this side, the speed of the liquid is 2.47 ms, and the pressure is 1.20 x 105 Pa. The right sides cross

Dust obscures visible light from distant stars. Therefore, how can astronomers confidently measure the rotation curve of the Milky Way Astronomers measure the motion of stars in globular clusters above the plane of the Galaxy. Astronomers use satellites to create an image of the plane of the Milky Way Galaxy faceon. Measurements are made of cold

is the rate of change of ...... due to a change in speed andor direction Velocity inertia O Velocity acceleration Inertia acceleration Acceleration inertia Acceleration velocity Position velocity Question 2 (15 points) An object on a horizontal plane has an initial velocity Vo (3.0f 4.0)ms at a point where its position vector is ro (4.0f

Question 6 Oo 01 02 888 000 888 Question 7 answer below 888 888 Question 667 (15 points) How far away from the edge of the cliff does the ball fall (D ) Do not forget to encode your answer below 03 04 05 06 07 O 04 05 4 O5 O 61259 A projectile is launched from the ground with initial speed to 68 ms at an angle 339 with the horizontal. There is a

Question Derive Eq. (7.45). Hint start from Fig. 7.5 and let 0 0.,Star Figure 7.4 Light from a star in the LMC is deflected by a MACHO on its way to an observer in the disk of our galaxy (seen edgeon in this figure). (07machostar.pdf) If the MACHO is exactly along the line of sight between the observer and the lensed star, the image produced is a

Suppose that one of your friends is four years older than you. She wants to travel for two years to space station, as measured by her, such that when she arrives there she will be the same age as you are back on earth. (a) What is the relevant proper time in this problem (b) What is the relevant nonproper time (c) At what speed, relative to earth,

Determine the net heat transferred in these two processes, the net work, and the internal energy changes in kJ/kg. A mass of water vapor initially at 4.0 MPa and 500C (state 1) is cooled at constant volume to a temperature of 200C (state 2). Heat is then extracted from the water at constant temperature until it reaches the saturated liquid state

stion 4 (6 points) When a car rounds a curve at high speed, the tires exert a centripetal force on the road. there are no centripetal forces involved. the car exerts a centripetal force on the road. the car body exerts a centripetal force on the tires. the road exerts a centripetal force on the tires. and get into motion in a v

relative to an origin. The object moves with constant acceleration and after t5 s, its velocity becomes (18.0f 6.05)ms. What is the velocity of the object An object on a horizontal plane has an initial velocity Vo (3.0f 4.0f)ms at a point where its position vector is ro (4.013.05) m at t 2 s O8f3.45 O712.6f O6f3.65 O91 4.85 O 514.25

Two vectors A1a 3k and B 52 35 k are given. If A B 1, determine a 02 1 3 O 0 02 O 1

What is the velocity of a 50 kg diver diving off of a 20 m diving board if his kinetic energy is 165 J? Enter your answer to two decimal places

For an average BWR rod with Tco 300C, determine Tmax and Ta. Assume the following gap thickness is zero and thus RRfor clad thickness is equal to Rco Rfo, steady state, fuel density is equal to 95 theoretical density, thermal conductivity of the fuel varies significantly with temperature, clad is made of Zircaloy 2.

The relativistically correct way of transforming velocities between different reference frames is given by the Lorentz velocity transformation or equivalently Here U, and u are the velocities of an object as measured in reference frames S and S respectively. The velocity of S relative to Sis u and all motion is along the rdirection. I U u 1 uvc

A pipe has a crosssectional area A at ground level. It bends upward and levels off at a height 7. However, the crosssectional area of the upper portion of the pipe is larger, such that A A. The flow rate at the bottom is 4 2 ms, and the flow rate at the top is 1.7 ms For what value of h will the pressure at the bottom equal the pressure at the

An electron moves through a region with a uniform magnetic field of unknown magnitude directed in the y direction,At the instant that the electron is moving in the z direction with a velocity of 2.71e6m, it experiences a magnetic force of 1.00 pN in the x direction. Calculate the magnitude of the magnetic field.

The xcomponent of the electrostatic force in Newtons on charge 2 with q21.5 C from charge 1 with q4 C arranged as shown in the figure equals 3.7 7.3 O 11.0 14.6 18.3 4 cm 92 7cm

The snapshot graph at t 3 s and the history graph at x 0 cm of a wave are shown below (snapshot on left, history on right). y(cn) 1 y(cn) 2 1 (cn t(s),a. What are the amplitude, frequency, and speed of the wave Amplitude cm Frequency Speed b. The equation of this wave can be expressed as y f(x, t) A sin(kx wt), where a, k, and w are

A satellite passes a 40 km(64km) above the earth surface. How fast a rocket be shot up initially to just reach the height?

A 1.2-kg block of ice (frozen water) comes out of the freezer at -15.0C. How much energy does it take to warm and melt it into liquid water at 50.0C?

An oral surgeon wishes to inspect a patient's tooth with a magnifying mirror. He places the mirror 1.00 cm behind the tooth. This results in an upright, virtual image of the tooth that is 8.00 cm behind the mirror. (a) What is the mirror's radius of curvature (in cm)? (b )What magnification describes the image described in this passage?

A 1.75m-tall person stands 8.80 m in front of a large, concave spherical mirror having a radius of curvature of 4.80 m. (a) Determine the mirror's focal length (in m ). (b) Determine the image distance (in m ). (c) Determine the magnification. (d) Is the image real or virtual?

A pendulum of length 4m and mass 10kg is released from a horizontal position. It swings down to its lowest point. What is the cord tension at this point?

Two spheres have masses M (sphere 1) and 4.00M (sphere 2). Let their radii be R and 3.00R, respectively. The spheres are released from rest when the distance between their centers is 14.0R.,How fast will sphere 1 be moving when they collide Assume that the two spheres interact only with each other. Enter your answer in units of GMR.,How fast will

a) the cord tension b) the speed of the mass

3. A conical pendulum of mass 7.6 makes an angle of 30 with the vertical. The cord is 1.4m long. Find

A physicist is designing a contact lens. The material has is an index of refraction of 1.60. In order to yield the prescribed focal length, the physicist specifies the following dimensions inner radius of curvature 2.46 cm outer radius of curvature 1.94 cm where the inner radius of curvature describes the surface that touches the eye, and the

An alpha decay is the emission of an alpha particle (mass of 6.61 x 1020 kg or 4 aum, atomic mass units) from an atomic nucleus. A Technetium mucleus (mass of 1.63 x 1025 kg or 98 anu) undergoes an alpha decay, emitting a single alpha particle. Your detector catches the alpha particle and finds it velocity to be 1.5x 10 ms What is the recoil

An Elf (m, 0.9 kg) on a L 2.0 m long shelf of mass m, 1.5 kg and puts a large present (m, 8.6 kg) at a distance 0.34 0.6 m away from a wall. The Elf stands on the top of the present. The rope at the end of the shelf makes an angle of 60 with the horizontal direction. Determine the magnitude of tension in the string. Answer in N to two decimal

6. DETAILS A 2.07kg particle has a velocity (2.02 13.10 ) ms, and a 2.91kg particle has a velocity (0.97 1 5.92 j) ms. (a) Find the velocity of the center of mass ms (b) Find the total momentum of the system. 3) kgms Submit Answer MY NOTES ASK YOUR TEACHER

A mechanic pushes a 2.80 X 10 kg car from rest to a speed of v, doing 4500 J of work in the process. During this time, the car moves 22.0 m. Neglecting friction between car and road, find each of the following. (a) the speed v ms (b) the horizontal force exerted on the car N,A projectile is launched with a speed of 45 ms at an angle of 55 above

A sledge loaded with bricks has a total mass of 18.4 kg and is pulled at constant speed by a rope inclined at 20.4 above the horizontal. The sledge moves a distance of 19.9 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope N (b) How much work is done by the

Gravitational force of two masses Two objects with mass m 177 kg and m Answer Show feedback False True 2a Find the magnitude of the net gravitational force (in newtons) exerted by these objects on a m3 object placed midway between them. Give your answer in millinewtons (mN). Show feedback Mass m 542 kg are fixed in place at a separation of D

You are attempting to design an ambulance siren. You would like the siren to be distinct enough that it will be clearly audible in case of emergency, but not unnecessarily disruptive. (a) Suppose that you would like to have a siren which is loud enough that its intensity will exceed that of typical street traffic (which has a sound level of 85 dB)

C) Express v and B in component form, using a Cartesian coordinate system of your choice. Be sure to define your choice of Cartesian coordinate system. Now determine A, where A v B, using the component form expressions you just found. Draw A based on the component form expression you just determined. Verify that your result is consistent with

An engineer turns on a ventilation fan after a long zoom meeting. The fan's electric engine applies a constant torque that provides the fan with an angular acceleration of a = 3.43 rad/s. What is the angular velocity of the fan after N = 13 complete revolutions?