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Physics Questions and Answers October 20, 2019

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Two point charges 3 . 0 cmcm apart have an electric potential energy - 6 0 JJ . The total charge is 1 0 nCnC . Part A What is the lesser charge? Express your answer in nanocoulombs. Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate

Suppose the straight - line distance between New York and San Francisco is 4 . 1 x 1 0 ^ 6 m ( neglecting the curvature of the earth ) . A UFO is flying between these two cities at a speed of 0 . 7 0 c relative to the earth. What do the voyagers abord the UFO measure for this distance?

The change from one radionuclide to a stable element having the same atomic mass is called

An inductor used in a dc power supply has an inductance of 1 3 . 0 H and a resistance of 1 3 0 . 0 . It carries a current of 0 . 5 0 0 A

The velocity of a particle at t = 5 s is 5 0 m / s ; at t = 7 s , it is 5 0 m / s . Calculate the average acceleration during the time interval. Please provide your answer in m / s 2 and round to the nearest two decimal places. The velocity of a particle at t = 5 s is 5 0 m / s ; at t = 7 s , it is 5 0 m / s . Calculate the average acceleration

The cosmic microwave background allows us to talk about the "temperature of the universe." What is roughly the temperature of the universe today? 1 0 0 million Kelvin 0 Kelvin 5 0 0 0 Kelvin 3 Kelvin
The cosmic microwave background allows us to talk

an oscillating LC circuit consisting of a 1 . 5 nF capacitor and a 4 . 0 mH coil has a maximum voltage of 3 . 6 V . What are a ) the maximum charge on the capacitor, b ) the maximum current through the circuit, c ) the maximum energy stored in the magnetic field of the coil?

When Nate fully exhales, he has a body density of 1 . 0 2 g c m 3 ( 1 0 2 0 k g m 3 ) . During a triathlon swim, Nate wears a wetsuit, and his density thus decreases to 0 . 9 9 g c m 3 ( 9 9 0 k g m 3 . The water he swims in has a density of 1 . 0 0 g c m 3 ( 1 0 0 0 k g m 3 ) . If he fully exhales, Nate can float in the water if he doesn't wear a

The Meissner effect is the exclusion of magnetic fields from a material when it becomes superconductive, and Tc is the superconducting transition temperature. This allows magnets to levitate above superconductors! At what temperatures can the Meissner effect occur

One end of an iron poker is placed in a fire where the temperature is 5 0 5 , and the other end is held in the hand of a person and kept at a temperature of 3 7 . The poker is 1 . 2 m long and has a radius of 6 . 0 1 0 ^ - 3 . If the energy lost along the length of the poker is ignored, how much heat energy is transferred from one end of the poker

If the 5 0 kg skate border is on a different ramp with the same 3 2 degree angle from the horizontal and is traveling down the ramp at a constant velocity, what is the friction coefficient going to be between the skateboard and the ramp?

illustrates an Atwood's machine. Let the masses of blocks A and B be 8 . 5 0 kg and 2 . 5 0 kg , respectively, the moment of inertia of the wheel about its axis be 0 . 2 2 0 kg m 2 , and the radius of the wheel be 0 . 1 2 0 m . There is no slipping between the cord and the surface of the wheel. Find the magnitude of the linear acceleration of

When raised to a height of 8 . 0 5 meters a box of bearings has a potential energy of 1 9 6 0 7 . 4 3 Joules. What is the mass of the box? Question 6 8 options: A ) 1 2 4 1 . 7 4 kg B ) 3 0 7 . 6 7 kg C ) 2 4 8 . 3 5 kg D ) 4 9 . 6 7 kg

A geosynchronus satellite ( Orbital period T = 2 4 hours ) is one that stays above the same point on the Earth, whfih is possible only if it is above a point on the equator. Such satellites are used for TV and radio transmission, for weather forecasting, and as communication relays. [ Mass of the Earth = 5 . 9 8 * 1 0 ^ 2 4 kg , Radius of the

Question 2 1 :A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at constant speed. If the woman suddenly stops applying a horizontal force to the box, then the box:Answer Choices: 1 . Continues at a constant speed . 2 . Continues moving at constant speed for a while and then slows to a

A block of mass 4 kg is sliding along a horizontal frictionless surface when it collides perfectly elastically with the bottom tip of a uniformly dense rigid rod of length 1 m and mass 2 * 4 kg as shown in the figure. The rod is pivoted about a frictionless axle through one end and, initially, hangs straight down and is at rest. What is the speed

Two parallel conducting plates are separated by 1 0 . 6 cm , and one of them is taken to be at a potential of zero volts. What is the electric field strength between them in V / m , if the potential 8 . 8 cm from the zero volt plate is 4 7 5 V ?

At some instant, the blood pressure in the heart is 1 . 8 1 0 4 P a . Assume the density of blood is the same as water.
At some instant, the blood pressure in the heart

A car is pulling west on a trailer with a force of 1 5 0 0 N . According to Newton's Third Law, what other force must be acting? a ) a force on the trailer of 1 5 0 0 N [ W ] b ) a force on the car of 1 5 0 0 N [ W ] c ) a force on the car of 1 5 0 0 N [ E ] d ) a force on the trailer of 1 5 0 0 N [ E ]
A car is pulling west on a trailer with a force

When the current in a long, straight, air - filled solenoid is changing at the rate of the voltage across the solenoid is 0 . 6 0 0 V . The solenoid has 1 2 0 0 turns and uniform cross - sectional area Assume that the magnetic field is uniform inside the solenoid and zero outside, so the result ( see Exercise 3 0 . 1 1 ) applies. What is the

Part A smaller loop is B , what is the magnetic field strength at the center of the larger loop? B / 4 B 2 8 B 2 B 4 B
Part A smaller loop is B , what is the magnetic

Which of the following objects has the least acceleration? an empty shopping cart pushed with a hard force a full shopping cart pushed with a hard force an empty shopping cart pushed with a light force a full shopping cart pushed with a light force
Which of the following objects has the least

Part A A stiff wire 5 3 . 5 cm long is bent at a right angle in the middle. One section lies along the \ ( z \ ) axis and the other is along the line \ ( y = 2 x \ ) in the \ ( x y \ ) plane. A current of 2 4 . 5 A flows in the wire - down the \ ( z \ ) axis and out the line in the \ ( x y \ ) plane. The wire passes through a uniform magnetic
Part A A stiff wire 5 3 . 5 cm long is bent at a

A 1 0 kg book is placed against a wall by applying a 2 5 0 N force at 6 0 degrees above the horizontal. The coefficient of kinetic friction between the wall and the book is 0 . 2 5 . The book starts from rest, the book travels 3 . 0 m up the wall, see the picture below. Create a free body diagram for the situation and calculate: a . The work done
A 1 0 kg book is placed against a wall by

Three uniform spheres of masses m 1 = 2 . 5 0 k g , m 2 = 4 . 0 0 k g , and m 3 = 5 . 5 0 k g are placed at the corners of a right triangle ( see figure below ) . Calculate the resultant gravitational force on the object of mass m 2 , assuming the spheres are isolated from the rest of the Universe. q , j ) 1 0 - 1 1 N Need Help? Additional
Three uniform spheres of masses m 1 = 2 . 5 0 k g

A long straight wire going through the origin

Consider mass particle system below and find the magnitude and direction of net gravitational force acts on particle at point C ? ABCD is square shape with length of each side a = 1 . 5 m and mass of each particle as follows, m 1 = 2 . 5 k g , m 2 = 3 . 8 k g , m 3 = 6 . 2 k g , m 4 = 1 . 8 k g . Universal Gravitational Constant, G = 6 . 6 7 * * 1
Consider mass particle system below and find the

If you increase the length of a pendulum with a mass at the end, what happens to the period of its motion? The period increases The period decreases The period stays the same
If you increase the length of a pendulum with a

Vector, vec ( V ) 1 is 6 . 6 units Jong and points along the negative x - axis. Vector vec ( V ) 2 , is 8 . 5 units long and points + 4 5 Above the positive x axis ( N of E ) . a . What are the x and y components of each vector? b . Determine the sum vec ( V ) 1 + vec ( V ) 2 ( magnitude and angle ) ; we call this sum the resultant!
Vector, vec ( V ) 1 is 6 . 6 units Jong and

6 4 A one - dimensional longitudinal wave traveling along a string is described by the following equation: D ( z , t ) = ( 0 . 2 m ) s i n ( z + 1 0 t ) where all distances are measured in meters and time in seconds. Which of the following statements is incorrect? The wave has a speed of 1 0 m s . The wave travels in the - z direction. The
6 4 A one - dimensional longitudinal wave

What is the speed of light in salt, whose index of re - fraction is 1 . 5 4 4 ?

What does the word revelation mean

2 - A roller coaster starts from rest at the top of the hill. What is the speed of the cart at the bottom of the 2 5 meters height location, if frictional work provided - 5 0 0 0 J of energy throughout the path taken? The mass of the cars + people is 1 0 0 0 kg ? ( 1 0 points )
2 - A roller coaster starts from rest at the top

2 7 . 3 1 - A thin, 5 0 . 0 - c m - long metal bar with mass 7 5 0 g rests on , but is not attached to , two metallic supports in a uniform 0 . 4 5 0 T magnetic field, as shown in Fig. E 2 7 . 3 1 A battery and a 2 5 . 0 resistor in series are connected to the supports. ( a ) What is the highest voltage the battery can have without breaking the
2 7 . 3 1 - A thin, 5 0 . 0 - c m - long metal

Two parallel wires carry equal amounts of current into the page as shown. What is the direction of the magnetic field at point N ? A square loop of radius 3 cm and resistance 1 0 is in a region of time - dependent B - field B ( t ) = 4 ( 1 - 0 . 2 t ) . All quantities in SI units. a: Determine the time - dependent expression for the magnetic flux
Two parallel wires carry equal amounts of current

A golf ball of mass m is hit by a golf club so that the ball leaves the tee with speed v . The club is in contact with the ball for time T . The average force on the club on the ball during the time T is: m v T ( 1 2 ) m v 2 T m v T m v 2 2 T m T 2 2 v
A golf ball of mass m is hit by a golf club so

After being released, the 2 . 0 kg block accelerates to the right along the frictionless track as the 1 . 0 kg block accelerates downward. The pulley is massless and frictionless. What is the tension in the string? A . 9 . 8 N B . 6 . 5 N 2 . 0 kg C . 3 . 3 N D . 4 . 9 N E . 1 0 N 1 . 0 kg
After being released, the 2 . 0 kg block

A steel plate has a circular hole drilled through it . The plate is put into a blast chiller and cooled. What happens to the hole as its temperature decreases? Show answer choices it increases in size it decreases in size it is unaffected it stretches into an ellipse

What are the three longest wavelengths for standing waves on a 2 6 1 - cm - long string that is fixed at both ends? Enter your answers in meters in descending order separated by commas. If the frequency of the second - longest wavelength is 5 9 Hz , what is the frequency of the third - longest wavelength? Express your answer with the appropriate

A thin film of soap with n = 1 . 3 9 hanging in the air reflects dominantly red light with = 6 8 8 nm . What is the minimum thickness of the film? Now this film is on a sheet of glass, with n = 1 . 5 2 . What is the wavelength of the light in air that will now be predominantly reflected?

A rhinoceros is at the origin of coordinates at time t 1 = 0 . For the time interval from t 1 to t 2 = 1 1 . 5 s , the rhino's average velocity has x - component - 4 . 1 0 m s and y - component 4 . 9 0 m s .
A rhinoceros is at the origin of coordinates at

End A of the bar AB in rests on a frictionless horizontal surface, and end B is hinged. Ahorizontal force F of magnitude 2 1 0 N is exerted on end A . Ignore the weight of thebar. Assuming that the bar is in equilibrium, what is the vertical component of the forceexerted on the bar by the hinge at B ? ( Answer choices are in Newtons

1 4 ) Calculate the pressure exerted on the ground by a 6 5 kg person standing on one foot. Assume that the bottom of the person's foot is 1 3 cm wide and 2 8 cm long. A ) 1 . 7 1 0 4 Pa B ) 3 . 9 1 0 4 Pa C ) 1 . 8 1 0 3 Pa D ) 4 . 3 1 0 4 Pa

A torque of 1 2 N m is applied to a solid, uniform disk of radius 0 . 5 0 m . If the disk

Which statement about an electron in the 4 d 4 d state is correct? A . The magnitude of its orbital angular momentum is 6 6 . B . The largest orbital angular momentum it could have in any given direction is 4 4 . C . Its magnetic quantum number could have the value 2 2 , 1 1 , or 0 0 . D . Its spin angular momentum is 6 6 .

Masses are placed on a moveable piston of a gas cylinder and the system is allowed to come to equi librium. This is the initial state of the gas, known as state i . The gas cylinder is then placed on a block of ice and then reaches a new equilibrium. This is the final state of the gas, known as state f . From state i to state f , which quantities

A laboratory electromagnet produces a magnetic field of magnitude 1 . 4 0 T . A proton moves through this field with a speed of 5 . 8 4 1 0 6 m / s . ( a ) Find the magnitude of the maximum magnetic force that could be exerted on the proton. N ( b ) What is the magnitude of the maximum acceleration of the proton? m / s 2 ( c ) Would the field

An atom in an excited state of 4 . 7 eV emits a photon and ends up in the ground state. The lifetime of the excited state is 1 . 0 1 0 1 3 s 1 . 0 \ times 1 0 ^ { - 1 3 } \ , \ text { s } 1 . 0 1 0 1 3 s . ( a ) What is the energy uncertainty of the emitted photon? ( b ) What is the spectral line width ( in wavelength ) of the photon?

Suppose you had used a less sensitive balance for the Archimedes method ( 0 . 1 g ) . Would that change the precision of your density for that method?

a basketball of mass 0 . 5 6 4 kg is dropped Fromm rest from a height of 1 . 4 5 m . It rebounds to a height of 0 . 6 3 3 m . a ) How much mechanical energy was lost during the collision with the floor? B ) A basketball player dribbles the ball from aa height of 1 . 4 5 m by exerting a constant downward force on it for a distance of 0 . 1 3 3 m .

Atmospheric pressure becomes less with Group of answer choices increased density. the weight of the device used to measure it . increasing altitude. decreasing altitude.

A 1 . 8 g particle has momentum 4 . 0 1 0 ^ 5 kg m / skg m / s What is the particle's speed? Express your answer as a fraction of cc . How many kilograms of 2 3 5 U 2 3 5 U undergo fission each year in this power plant? Express your answer in kilograms per year.

Water flows through a 0 . 5 cm diameter pipe connected to a 1 cm diameter pipe copared to the speed of the water in the o . 5 cm piper, the spped in the 1 cm pipe is

a person is standing at the center of a rotating platform. if the person moves toward the outside of the platform,

When water is boiled under a pressure of 2 . 0 0 atm, the heat of vaporization is 2 . 2 0 1 0 6 J / kg and the boiling point is 1 2 0 C . At this pressure, 1 . 0 0 kg of water has a volume of 1 . 0 0 1 0 3 m 3 , and 1 . 0 0 kg of steam has a volume of 0 . 8 2 4 m 3 . Part A Compute the work done when 1 . 0 0 kg of steam is formed at this

The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are L _ ( 1 ) , L _ ( 2 ) = 0 . 7 0 0 L _ ( 1 ) , and L _ ( 3 ) = 0 . 4 0 0 L _ ( 1 ) . The thermal conductivities are k _ ( 1 ) , k _ ( 2 ) = 0 . 8 8 0 k _ ( 1 ) , and k _ ( 3 ) = 0 . 7 2 0 k _ ( 1 ) . The temperatures at the left and right sides of
The figure shows the cross section of a wall made

A test tube standing vertically in a test tube rack contains 2 . 5 cm of oil, whose density is 0 . 8 1 g / cm 3 and 7 . 7 cm of water. What is the gauge pressure on the bottom of the tube? The acceleration of gravity is 9 . 8 m / s 2 . Answer in units of Pa

The critical density of the universe is the _ _ _ _ _ _ _ _ . Question 1 options: actual average density of the universe average density the universe would need for gravity to someday halt the current expansion if dark energy did not exist density of dark matter in the universe density of water

Question 4 3 What is the speed of sound in a steel rod? 1 5 0 0 m / s 8 0 0 0 m / s 5 0 0 0 m / s 3 0 0 0 m / s
Question 4 3 What is the speed of sound in a

A convex mirror has a radius of curvature whose magnitude is 5 7 cm . The mirror is positioned on a horizontal optical bench with its front surface at 0 cm . A 6 . 0 cm long fluorescent lamp oriented vertically is placed at + 1 1 0 cm . What is the focal length of the mirror? Submit Answer Tries 0 / 1 2 At what distance from the mirror can we find
A convex mirror has a radius of curvature whose

A quantity of ideal gas is held in a square box of length \ ( L \ ) . The measured macroscopic pressure of the gas is \ ( P \ ) . A gas particle of mass \ ( m \ ) travelling perpendicular to a wall of the container makes on average \ ( N \ ) collisions per second with the wall. Assuming that collisions with the wall are elastic and there are no
A quantity of ideal gas is held in a square box

Question 2 8 3 pts This figure shows a hydraulic lift. The force F 1 has a magnitude of 1 0 0 N , and the area A 1 is 0 . 0 1 m 2 . If the area A 2 is 1 . 0 m 2 , what is the weight of the truck? 1 , 0 0 0 , 0 0 0 N 1 0 0 , 0 0 0 N 1 0 0 0 N 1 0 , 0 0 0 N
Question 2 8 3 pts This figure shows a hydraulic

Three identical springs, each with a spring stiffness of k = 3 0 N m k = 3 0 ? ? , | | | text { N m } k = 3 0 N m , are connected in series. What is the effective spring constant of the system? A . 5 N m B . 7 . 5 N m C . 1 0 N m D . 1 5 N m
Three identical springs, each with a spring

Any source of magnetic fields has a North pole and a South pole. There has never been observed a magnetic source with either only a South pole or only a North pole.

If you are looking at lead V 6 and see a negative QRS , what ( general ) direction is the impulse traveling?

Example - In the figure, a block weighing 1 7 . 2 N , which can slide without friction on an incline at angle \ ( \ theta = 3 5 . 0 ^ { \ circ } \ ) , is connected to the top of the incline by a massless spring of spring constant \ ( 1 2 5 \ mathrm { ~N } / \ mathrm { m } \ ) . The block is initially at its equilibrium position. Then it is pulled
Example - In the figure, a block weighing 1 7 . 2

Problem 7 : ( 1 1 \ % of Assignment Value ) On its highest power setting, a microwave oven can increase the temperature of 0 . 3 7 9 kg of spaghetti by \ ( 4 5 . 0 ^ { \ circ } \ mathrm { C } \ ) in \ ( 1 2 0 . \ mathrm { s } \ ) . Part ( a ) Given that its specific heat is \ ( 3 . 7 6 \ times 1 0 ^ { 3 } \ mathrm { ~J } / \ left ( \ mathrm { kg }
Problem 7 : ( 1 1 \ % of Assignment Value ) On

A balloon is filled with \ ( 1 0 0 0 \ mathrm { ~cm } ^ { 3 } \ ) of air. The balloon is inside a house where the temperature is \ ( 2 0 ^ { \ circ } \ mathrm { C } \ ) . The balloon is taken outside where the air temperature is \ ( 1 0 ^ { \ circ } \ mathrm { C } \ ) . Assume the pressure of the air inside the balloon remains constant. Select all
A balloon is filled with \ ( 1 0 0 0 \ mathrm {

Compared to the acceleration due to Earth's gravity at a point three Earth radii above the North Pole, the acceleration due to Earth's gravity at the North Pole is the same. 3 times greater. 4 times greater. 9 times greater. 1 6 times greater.Compared to the acceleration due to Earth's gravity at a point three Earth radii above the North Pole, the
Compared to the acceleration due to Earth's

A 2 5 0 0 - N pile driver ram falls 1 0 m and drives a post 0 . 1 m into the ground. The average force on the post is 2 5 0 , 0 0 0 N 2 5 0 0 N 2 5 . 0 0 0 N 2 . 5 0 0 . 0 0 0 N
A 2 5 0 0 - N pile driver ram falls 1 0 m and

for an ohmic resistor made of metal, the resistance is

Explain lifting an object with your forearm in terms of a lever.
Explain lifting an object with your forearm in

A disk 1 0 . 0 cm in radius rotates at a constant rate of 1 2 5 rev / min about its central axis. What is the angular speed in radians per second? What is the tangential speed at a point 3 . 0 0 cm from its center? What is the radial acceleration of a point on the rim? What is the total distance a point on the rim moves in 2 . 0 0 s ?

A block sits on an incline plane. What is the angle the incline plane makes with the horizontal ( the level ground ) equal to ? Group of answer choices The angle the x - component of the weight force makes with the weight force itself. The angle the x - component of the normal force makes with the normal force itself. The angle the y - component

a fire truck sprays water in the air at a 7 0 degree angle so that it just reaches the 4 th floor building, located 2 0 m above the ground. how much pressure in the hose is required to do this? you can assume the hose is held at ground level and the water in the hose isnt moving fast

what does the red blood cell experiment show?

A parallel - plate capacitor is constructed of two horizontal 1 7 . 6 - cm - diameter circular plates. A 1 . 5 g plastic bead with a charge of - 6 . 4 nC is suspended between the two plates by the force of the electric field between them.

If a barometer is carried to the top of a mountain, the level of mercury in the barometer will Group of answer choices fall rise

what is the difference between arson and incendiary fires

The length of nylon rope from which a mountain climber is suspended has an effective force constant of 1 . 4 0 1 0 4 N / m 1 . 4 0 1 0 4 N / m . ( a ) What is the frequency at which he bounces, given his mass plus and the mass of his equipment are 9 0 . 0 kg ? ( b ) How much would this rope stretch to break the climber s fall if he free - falls 2

Which of the following scenarios describe an object being acted on by a non - conservative force? ( 3 points ) A puck hovers and glides across an air track at constant velocity. A dishwasher was pulled up to a window by a rope using a pulley system. A feather falls from one end of a tube to the other inside a vacuum. A charged particle was pushed

The optically stimulated luminescent ( OSL ) dosimeter may be worn for:

Question 7 The propeller on the aircraft shown in the figure spins ( about its axis ) at 2 0 0 0 rpm . The aircraft travels at speed 2 0 0 k m h r in a turn with radius 1 km . What is the angular velocity vector of ( i ) the body of the aircraft, and ( ii ) the propeller? Express your answer in the normal - tangential - vertical basis. Figure 7
Question 7 The propeller on the aircraft shown in

What do we call the rate of change of velocity that occurs when a net force is acting on an object? A centripetal tendency A displacement An average velocity An acceleration
What do we call the rate of change of velocity

A straight cylindrical wire lying along the x axis has a length of 0 . 5 0 0 m and a diameter of 0 . 2 0 0 mm . It is made of a material that obeys Ohm's law with a resistivity = 4 . 0 0 x 1 0 - 8 m . Suppose that a potential of 4 . 0 0 V is maintained at x = 0 and that at x = 0 . 5 0 0 m , V = 0 . Determine ( a ) the electric field of the wire, (

A fisherman of mass m = 6 4 . 8 kgm = 6 4 . 8 kg is sitting in a canoe with mass M = 1 7 1 kgM = 1 7 1 kg on a warm summer day. The canoe has length L = 4 . 4 3 mL = 4 . 4 3 m and he is sitting 1 meter from the end of the canoe. After several hours of not catching anything, he decides to try his luck from the other end of the boat, so he gets up

What is the RMS speed of Helium atoms when the temperature of the Helium gas is 2 4 0 . 0 K ? ( Possibly useful constants: the atomic mass of Helium is 4 . 0 0 AMU, the Atomic Mass Unit is: 1 AMU = 1 . 6 6 1 0 - 2 7 kg , Boltzmann's constant is: kB = 1 . 3 8 1 0 - 2 3 J / K . ) What would be the RMS speed, if the temperature of the Helium gas was

the specific heat of gold is 1 2 9 J / kg . k . what is the quantity of heat energy required to raise temprature of 0 . 1 kg of gold by 5 0 k ?

Two football players collide head - on in midair, moving along the same horizontal direction, while trying to catch a thrown football. The first player is 8 8 kg and has an initial velocity of 6 . 1 5 m / s ( in the positive direction ) , while the second player is 1 1 4 kg and has an initial velocity of 3 . 4 m / s

What is the magnitude of the equilibrant? pounds ( Round to the nearest tenth.
What is the magnitude of the equilibrant? pounds

( i ) What is the maximum speed of the block? ( See formula sheet ) ( ii ) What is the magnitude of the maximum acceleration of the block? A ) ( i ) 1 . 2 6 ( m / s ) ( ii ) 1 3 . 1 3 ( m / s 2 ) B ) ( i ) 1 . 5 2 ( m / s ) ( ii ) 0 . 5 1 ( m / s 2 ) C ) ( i ) 3 . 6 6 ( m / s ) ( ii ) 1 . 5 0 ( m / s 2 ) D ) ( i ) 2 . 1 4 ( m / s ) ( ii ) 1 2 . 2

Using the definitions of mass and mole fractions, identify the correct relation between them. Assume mfimfi represents the mass fraction of a component, yiyi represents the mole fraction of the same component, MiMi represents the molar mass of the same component, and MmMm represents the molar mass of the mixture. Multiple Choice mfi = yi ( 1 +

An oil slick on water is 8 0 . 3 nm thick and illuminated by white light incident perpendicular to its surface. What color does the oil appear ( what is the most constructively reflected wavelength, in nanometers ) , given its index of refraction is 1 . 4 6 ? ( Assume the index of refraction of water is 1 . 3 3 . )

A farmer is using a rope and pulley to lift a bucket of water from the bottom of a well that is hy = 1 5 m deep. The farmer uses a force F 1 = 5 7 . 5 N to pull the bucket of water directly upwards. The total mass of the bucket of water is mb + mw = 3 . 3 kg .

You have two perfectly insulated cups. One contains water and the other contains an equal volume of another liquid that has half the density of water and two times the specific heat. You heat the water from 1 0 to 2 0 0 C and the other liquid from 8 0 to 9 0 0 C . Which of the following would describe the amount of heat energy transferred to raise

Problem 2 . A ball of mass m is thrown vertically upward with an initial velocity v 0 . As it moves, it experiences an opposing air resistance force Fair = kv , where k is a positive constant and v is the velocity of the ball at any time. 1 . Write the equation of motion for the ball considering both gravity and air resistance. 2 . Determine the

Increase in Abetos should result in a decrease of the surface temperature true or false

In the rainy season, the Amazon flows fast and runs deep. In one location, the river is 2 4 mm deep and moves at a speed of 3 . 7 m / sm / s toward the east. The earth's 5 0 TT magnetic field is parallel to the ground and directed northward. If the bottom of the river is at 0 VV , what is the potential ( magnitude and sign ) at the surface?

A thin, light rope is draped over three frictionless pulleys with centers at ( - d , 0 ) , ( 0 , d ) and ( d , 0 ) around the origin. Each pulley is a solid disk of radius r = 2 cm and is equidistant from the origin. A 5 kg mass is attached to one side and a 7 kg mass to the other. What fraction of the angular momentum is in the pulleys?

Determine whether the following augmented feedback statements are examples of knowledge of results ( KR ) or knowledge of performance ( KP ) : Your foot placement on the beam should be more angled.You have to keep your head down and your eye on the ball.That was great! You stayed on the wobble board for 2 8 seconds.According to the radar gun, that

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