S
  1. study help
  2. subject categories
  3. sciences
  4. physics
  5. november 2019
  6. 23

Physics Questions and Answers November 23, 2019

Expert-verified solutions to help you succeed

A centrifuge in a medical laboratory rotates at a rotational speed of 3 6 0 0 rev / min . When switched off, it rotates 5 0 . 0 times at a constant angular acceleration before coming to rest. ( a ) Determine the initial angular speed of the centrifuge. ( b ) Determine the angle ( in radians ) through which the centrifuge rotates before coming to

What happens to a sample of water when it is heated between 0 C and 4 C ? Group of answer choices It vaporizes. Its volume increases. Nothing changes except its temperature. Its volume is reduced.

P 1 . Calculate the total energy in the n t h normal mode of vibration of a string of length L , linear mass density and tension T clamped at both ends. Calculate the total energy of the same string vibrating according to the equation y ( x , t ) = A 1 s i n ( x L ) c o s 1 t + A 3 s i n ( 3 x L ) c o s ( 3 t - 4 )
P 1 . Calculate the total energy in the n t h

Briefly describe the different physical methods by which heat may be transferred from one location to another. Give one example of each.

What is the velocity of a 9 5 0 kg car initially moving at 2 8 . 5 m s just after it hits a 1 2 0 kg deer running at 1 4 . 0 m s in the same direction? Assume the deer remains on the car. 1 4 . 5 m s 1 9 . 7 m / s 2 3 . 5 m / s 2 6 . 9 m / s
What is the velocity of a 9 5 0 kg car initially

3 ) The figure below shows a piece of insulated wire formed into the shape of a figure eight. You may consider the two loops of the figure eight to be circles, where the upper loop's radius is 4 . 0 0 cm and the lower loop's radius is 7 . 0 0 cm . The wire has a uniform resistance per unit length of \ ( 8 . 0 0 \ Omega / \ mathrm { m } \ ) . The
3 ) The figure below shows a piece of insulated

A roller coaster starts from rest at a point 6 1 m above the bottom of a dip. Neglect friction, what will be the speed of the roller coaster at the top of the next slope, which is 2 9 m above the bottom of the dip?

What angle is needed between the polarization direction of the light and the axis of the filter to cut its intensity in half? =
What angle is needed between the polarization

Calculate the mass of a solid gold rectangular bar that has dimensions LWH 4 . 7 0 cm times 1 4 cm times 2 5 cm

Two spacecraft in outer space attract each other with a force of 2 0 N . What would the attractive force be if they were one - half as far apart? Group of answer choices 8 0 N 1 0 N 4 0 N 5 N

The Hoover Dam is approximately rectangular in shape with a height of 2 3 0 m and width of 7 6 m . When the water is up to the top of the dam, estimate the pressure at the bottom of the dam and the net force tending to move it . Assume that water has a constant density of 3 kg / m 1 0 0 0 = o \ rho and there is no water on the downstream side of

What is the distance between the second and third dark lines of the interference pattern on the screen when the slits are illuminated with coherent light with a wavelength of 5 0 0 nmnm ? What is the distance between the second and third dark lines of the interference pattern on the screen when the slits are illuminated with coherent light with a

A plane electromagnetic wave varies sinusoidally in 8 2 . 2 MHz as it travels through vacuum along the positive x direction. The peak value of the electric field is 2 . 0 8 mV / m and it is directed along the positive y direction

Let + e + be + the + rectangular + box + blended + by + the + planes + confined + the + outward + flux + of

In a microwave Michelson interferometer the transmitter is fixed

A ship of displacement type will be designed. a . A ship of displacement type will be designed. As the design engineer of the ship, you need to decide on the main dimensions of the ship. Since you have been informed that you can increase the length value determined by the shipowner for the ship by maximum 1 0 % and that the new displacement value
A ship of displacement type will be designed. a .

What is the absolute pressure at the bottom of the barrel? Express your answer with the appropriate units.
What is the absolute pressure at the bottom of

Two 2 . 0 - cm - diameter disks spaced 2 . 0 mm apart form a parallel - platecapacitor. The electric field between the disks is 5 . 0 x 1 0 ^ 5 V / m .

In an isometric thermodynamic process, which of the following is true? A ) Q = 0 B ) change in U = 0 C ) W = 0 D ) T = constant E ) P = constant

A projectile is launched with an initial velocity of 8 0 ms at 3 0 degrees above the horizontal. What is the horizontal component of the projectiles acceleration

What is the maximum efficiency of a heat engine whose operating temperatures are 5 3 0 C C and 3 1 5 C C ?

If a freely falling object were equipped with a speedometer, its speed reading would increase each second by about Question 5 6 options: a variable amount. depends on its initial speed 5 m / s . 1 5 m / s . 1 0 m / s .

When using the scale to measure the apparent weight of the water cup with the submerged cylinder, does it matter if the cylinder touches the bottom of the cup? How would such contact affect your measurement, if at all?

A cork oating on a lake bobs up and down as a wave passes. The cork completes 4 . 0 0 4 . 0 0 cycles in 8 . 0 0 8 . 0 0 s . The wave peaks are 2 1 . 0 2 1 . 0 cm apart. Find the speed of the wave. Part 1 + Give the equation used for finding the speed of a wave in terms of its wavelength ( ) and its frequency ( ff ) . ( Enter as lambda ) Part 2

A Gaussian surface in the form of a hemisphere of radius R = 7 . 6 7 cm lies in a uniform electric field of magnitude E = 5 . 3 4 N / C . The surface encloses no net charge. At the ( flat ) base of the surface, the field is perpendicular to the surface and directed into the surface. What is the flux through ( a ) the base and ( b ) the curved

In a microwave Michelson interferometer the transmitter is fixed in position and the microwave beams spit in half

In the decay of the ? 4 7 C a to ? 4 7 S c , what energy is given to the neutrino when the electron a kinetic energy of 1 . 1 MeV . Exercise 9 :
In the decay of the ? 4 7 C a to ? 4 7 S c , what

A mass on a string of unknown length oscillates as a pendulum with a period of 7 . 0 ss . Parts A to D are independent questions, each referring to the initial situation. Part A What is the period if the mass is doubled? Express your answer with the appropriate units. View Available Hint ( s ) for Part A Activate to select the appropriates

Calculate the energy changes corresponding to the transitions of the hydrogen atom. Give all your answers in eV . Part ( a ) From n = 3 to n = 4 . Part ( b ) From n = 2 to n = 1 . Part ( c ) From n = 3 to n = .

Calculate the momentum of the system before the collision ( the left side of the equation ) and after the collision ( the right side of the equation ) . Calculate the percent difference between the Iwo values. Explain any difference in the values before and after the collision.Activity 1 : Elastic Collision with Equal Masses Data Table 1 Table 1 A
Calculate the momentum of the system before the

1 1 ) The magnetic field at the center of a solenoid is given by B = u . Ni / L , where N is the number of turns of the solenoid, i is the current through the solenoid, and L is the length of the solenoid. What is the self - inductance of a solenoid with [ N ] number of turns, length of [ L ] m , current of [ i ] A , and diameter of [ d ] m ?

From Chernobyl, 6 x 1 0 6 Ci of Cs - 1 3 7 was released. Cs - 1 3 7 has a half - life of 3 0 years. The released activity becomes _ _ _ _ _ x 1 0 6 Ci after 3 9 years.

In an engine, an almost ideal gas is compressed adiabatically to half its volume. In doing so , 2 8 5 0 JJ of work is done on the gas. How much heat flows into or out of the gas? What is the change in internal energy of the gas? Does its temperature rise or fall?

A simple harmonic oscillator consists of a block of mass 3 . 3 0 kg attached to a spring of spring constant 1 3 0 N / m . When t = 1 . 2 0 s , the position and velocity of the block are x = 0 . 1 8 1 m and v = 4 . 2 2 0 m / s . ( a ) What is the amplitude of the oscillations? What were the ( b ) position and ( c ) velocity of the block at t = 0 s ?

An ultraviolet lamp emits light of wavelength 3 7 4 nm at the rate of 3 8 4 W . An infrared lamp emits light of wavelength 7 0 6 nm , also at the rate of 3 8 4 W . ( a ) Which lamp emits photons at the greater rate? ( b ) What is the greater rate?

Galileo Galilei was the scientist that studied gravity by using inclined planes that "diluted" the acceleration of gravity and made it observable.

QUESTION 1 5 The change in the observed frequency of the sound waves during relative motion is known as frequency modulation the Doppler effect sound displacement waveform alteration
QUESTION 1 5 The change in the observed frequency

Repeated sprints during Stage 3 training should only last up to how many seconds? 5 seconds 1 0 seconds 3 0 seconds 6 0 seconds
Repeated sprints during Stage 3 training should

Electrical resistance in a wire depends on the wire s _ _ _ _ _ _ _ _ _ _ _ _ _ . I. conductivity II . length III. thickness

A rocket with mass 5 . 0 0 1 0 3 k g is in a circular orbit of radius 7 . 4 0 1 0 6 m around the earth. The rocket's engines fire for a period of time to increase that radius to 8 . 8 0 1 0 6 m , with the orbit again circular.
A rocket with mass 5 . 0 0 1 0 3 k g is in a

A brass allow has an elastic modulus of 3 9

The graph shows the x - component of a force acting on a 4 . 0 kg object as a function of the x coordinate ( the other components of the force are zero ) . When the object is at x = 0 m , its velocity is + 5 . 0 m s . At what position does the object turn around? A ) 6 . 0 m B ) 9 . 2 m C ) 8 . 6 m D ) 6 . 8 m E ) 4 . 0 m
The graph shows the x - component of a force

? 0 An ideal gas is enclosed in a piston, and exactly 1 6 0 0 J of work is done on the gas. As this happens, the internal energy of the gas increases by exactly 5 0 0 J . During this process, how much heat Q flows into or out of the ideal gas? Let a positive value indicate heat flow into the ges.
? 0 An ideal gas is enclosed in a piston, and

Main Menu Contents Course Contents Tarea 1 1 1 2 . 3 7 - Examples of Static Equilibrium . . . Timer Notes Evaluate Feedback Print Info To get up on the roof, a person ( mass 7 6 . 0 kg ) places a 6 . 1 0 - m aluminum ladder ( mass 1 1 . 3 kg ) against the house on a concrete pad with the base of the ladder 1 . 9 0 m from the house. The ladder
Main Menu Contents Course Contents Tarea 1 1 1 2

A 2 . 9 5 kg fish is attached to the lower end of a vertical spring that has negligible mass and force constant 9 0 0 N m . The spring initially is neither stretched nor compressed. The fish is released from rest. Part A What is its speed after it has descended 0 . 0 6 0 0 m from its initial position? Express your answer with the appropriate
A 2 . 9 5 kg fish is attached to the lower end of

Room 4 Parts of a Transverse Wave Those folks playing and relaxing on the beach have no idea what is headed their way. You must work quickly to save them. Transverse waves have several key points on each wave. Examine the waves below and pay special attention to the spots marked by letters. Find all letters, in reverse alphabetical order, that
Room 4 Parts of a Transverse Wave Those folks

5 . ( 2 p . ) A projectile with a mass 2 . 4 kg is fired from a cliff 1 2 5 m high with an initial velocity of 1 5 0 m / s , directed 4 1 above the horizontal. What are a ) the kinetic energy of the projectile just after firing and b ) its potential energy? c ) Find the speed of projectile just before it strikes the ground.

On the planet Newtonia, a simple pendulum having a bob with a mass of 1 . 2 5 kg and a length of 1 8 5 . 0 cm takes 1 . 4 2 s , when released from rest, to swing through an angle of = 1 2 . 5 , where it again has zero speed. The circumference of Newtonia is measured to be 5 1 , 4 0 0 km . What is the mass of the planet Newtonia?

( c ) In an isobaric process, the change in the internal energy equals the energy transfer by heat minus the work done on the system. [ Select ] [ " False " , "true", "More information required" ]

When blowing up a balloon on the beach, you measure the air pressure around you to be 1 4 . 7 psi ( pounds per square inch ) . The balloon is inflated with an automatic balloon inflator which stops adding helium when the gauge detects a pressure of 1 7 psi. what is the absolute pressure

An object is dropped from an altitude of one Earth radius above Earths surface. If M is themass of Earth and R is its radius, the speed of the object just before it hits Earth is given by:

What does sen have to say about the cause ( s ) of famine?

A fisherman's scale stretches 3 . 3 cmcm when a 3 . 0 kgkg fish hangs from it . What is the spring stiffness constant? What will be the amplitude of vibration if the fish is pulled down 2 . 8 cmcm more and released so that it vibrates up and down? What will be the frequency of vibration if the fish is pulled down 2 . 8 cmcm more and released so

What can you say about reflection and refraction of waves?

Two loudspeakers placed next to each other each emit a pure tone with the same amplitude. One speaker emits a tone with a frequency of 4 7 3 . 0 Hz , the other with a frequency of 4 8 0 . 0 Hz . A distant listener perceives a pure tone that has a single frequency, but varies in loudness with a perceived "beat." ( a ) What is the frequency ( in Hz

What is the force per meter of length on a straight wire carrying a 6 . 3 0 AA current when perpendicular to a 0 . 9 4 TT uniform magnetic field?

What are pulsars? Question 1 2 options: They are objects that produce a precise pattern of repeating radio wave pulses. The are rapidly spinning objects. They are neutron stars. All of the above. All of the above.

A scalloped hammerhead shark swims at a steady speed of 1 . 1 m / s with its 9 0 - cm - wide head perpendicular to the earth's 5 6 T magnetic field. What is the magnitude of the emf induced between the two sides of the shark's head?

How can thet dipole m 0 nemt i sO 3 cancel out

( - 2 1 0 8 2 5 0 ) + ( 8 . 3 1 4 + ( 2 9 8 ) - 7 . 4 4 what is answer

An electron is in a one - dimensional trap

1 . Fill a small balloon with just a little air, such that the balloon will fit inside of the syringe, and tie the balloon closed. 2 . Place the balloon in the syringe and put the syringe plunger just inside the opening of the syringe. 3 . Put the cap on the syringe and leave it there. HOLD THE CAP TIGHTLY ON as you push the plunger in as far as

If we halve the distance from an isotropic source of EM waves, the electric field amplitude will be 2 2 of its initial value. 1 2 2 of its initial value. 1 4 of its initial value. 2 times its initial value. 1 2 of its initial value.
If we halve the distance from an isotropic source

what is the pressure inside and outside the constriction

A laser emits a pulse of light that lasts 1 0 ns . The light has a wavelength of 6 9 0 nm , and each pulse has an energy of 4 8 0 mJ . How many photons are emitted in each pulse? ( c = 3 . 0 1 0 ^ 8 m / s , h = 6 . 6 2 6 1 0 ^ - 3 4 J s ) Group of answer choices 1 . 7 x 1 0 ^ 1 8 3 . 1 x 1 0 ^ 1 9 2 . 1 x 1 0 ^ 2 7 2 . 6 x 1 0 ^ 1 8

A harmonic wave travels in the positive x direction at 7 m / s along a taut string. A fixed point on the string oscillates as a function of time according to the equation y = 0 . 0 3 5 cos ( 4 t ) where y is the displacement in meters and time t is in seconds. What is the amplitude of the wave, in meters? What is the frequency of the wave, in

What is the wavelength of this standing wave? A . 0 . 2 5 m . B . 0 . 5 m . C . 1 . 0 m . D . 2 . 0 m .
What is the wavelength of this standing wave? A .

Two particles with positive charges q 1 q 1 = 0 . 4 8 0 nCnC and q 2 q 2 = 7 . 5 0 nCnC are separated by a distance of 1 . 1 5 mm .

X - rays of wavelength 0 . 2 nm are scattered from a block of material. The scattered x - rays are observed at an angle of 4 5 . 0 degrees to the incident beam. ( a ) calculate the wavelength of the x - rays scattered at this angle ( b ) Compute the fractional change in the energy of a photon in the collision.

lapter 2 5 Question 6 of 1 3 0 . 1 / 1 View Policies Show Attempt History Current Attempt in Progress Your answer is partially correct. In the figure V = 1 0 V , C 1 = 8 . 6 F , and C 2 = C 3 = 2 2 F . Switch S is first thrown to the left side until capacitor 1 reaches equilibrium. Then the switch is thrown to the right. When equilibrium is again
lapter 2 5 Question 6 of 1 3 0 . 1 / 1 View

A 2 3 kg box slides 4 . 0 m down the frictionless ramp shown in the figure ( Figure 1 ) , then collides with a spring whose spring constant is 2 0 0 N m . Part A What is the maximum compression of the spring? Express your answer with the appropriate units. s m a x = q , Part B At what compression of the spring does the box have its maximum speed?
A 2 3 kg box slides 4 . 0 m down the frictionless

for an electron in the 3 d state, determine the principle quantum number and the orbital quantum number. how many different magnetic quantum numbers are possible for the electron in that state

If the pressure reading of your pitot tube is 1 5 . 0 mm Hg at a speed of 2 0 0 k m h , what will it be at 7 0 0 k m h at the same altitude?
If the pressure reading of your pitot tube is 1 5

A + signal + produce + by + a + sound + coming + from + the + left + might + end + at + which + neuron + in + the + nucleus + laminaris

The total dose of gamma radiation typically used to treat prostate cancers of a certain stage.

In a standing wave, not necessarily at the fundamental frequency, on a string of length L , the distance between nodes is 2 . L / 2 . L / 4 . . 1 4 .
In a standing wave, not necessarily at the

Ideal gas air is the working fluid in a Carnot Cycle. The high temperature reservoir temperature is TH = 7 5 0 K and the cold reservoir is TC = 3 0 0 K . The isothermal expansion stage has heat transfer QH = 6 0 kJ . At the end of this isothermal expansion stage, the volume is 0 . 4 m 3 . The mass of air is m = 2 kg in the cycle. a . What is the

A simple magnifier has a focal length of 6 cm . Calculate the magnification.

Question 6 ( 1 point ) Listen What is required for an energy transfer by heat? Equal pressure A temperature difference No volume change Constant entropy
Question 6 ( 1 point ) Listen What is required

First Law of Thermodynamics. A thermodynamic system is taken from state A to state B to state C , and then back to A , as shown in the p - V diagram. The vertical scale is set by p s = 2 0 Pa , and horizontal scale is set by V s = 2 . 0 m 3 . ( i ) Please indicate the table cells of ( a ) - ( g ) whether c plus sign, a minus sign, or a zero should
First Law of Thermodynamics. A thermodynamic

As a gasoline engine is running , an amount of gasoline containing 1 5 , 0 0 0 J of chemical potential energy is burned in 1 s . During that second, the engine does 3 , 0 0 0 J of work What is the engines efficiency The burning gasoline has a temperature of about 4 0 0 0 F ( 2 5 0 0 k ) . The waste heat from the engine flows into air at about 8 0

What is the distance D between the origin and particle 2 if the net electrostatic force on particle 1 due to the other particles is zero? ( b ) If particles 3 and 4 were moved closer to the x asis but maintained their symmetry about that axis

a floor measures 9 . 8 9 m 2 . How many square centimeters does this represents?

A worker pushes horizontally on a 2 1 0 0 - NN refrigerator on a kitchen floor with a force of 2 8 . 0 NN . If the refrigerator moves forward, this person feels it pushing back with less than 2 8 . 0 NN . The person always feels a 2 8 . 0 NN push from the refrigerator.The person feels a 2 8 . 0 NN push from the refrigerator only if it does not

Identify the statement that correctly describes how certain physical properties affect fire behavior. Smooth - textured fuels will ignite more readily than rough - textured fuels. The rate of fire spread increases when a fire spreads across the flat surface of fuel. The convex surfaces of a fuel will radiate heat energy, increasing the intensity

Calculate the entropy change S as 0 . 0 3 1 7 kg of ice at 2 7 3 . 1 5 K melts. The latent heat of fusion of water is 3 . 3 3 1 0 5 J k g . S =
Calculate the entropy change S as 0 . 0 3 1 7 kg

Over a certain region of space the electric potential is V is equal to 3 X - 2 x ^ 2 y + 7 yz ^ 2 . What is the magnitude of the field at the point P that has the coordinate ( 1 , 0 , - 5 ) m .

The velocity of a particle moving along in the x - direction follows the function, v = 4 0 . 0 - 5 . 0 t . a ) Determine the average acceleration during the time interval t = 0 to t = 2 . 0 s . b ) Determine the instantaneous acceleration at t = 2 . 0 s . c ) Determine the function for the position of the particle.

A 5 5 g horizontal metal bar, 1 5 - c m - long, is free to slide up and down between two tall, vertical metal rods that are 1 5 cm apart. A 6 . 0 1 0 - 2 T magnetic field is directed perpendicular to the plane of the rods. The bar is raised to near the top of the rods, and a 1 . 0 resistor is connected across the two rods at the top. Then the bar
A 5 5 g horizontal metal bar, 1 5 - c m - long,

None of the three methods of heat transfer - conduction, convection, and radiation - can transfer energy through a vacuum. True False
None of the three methods of heat transfer -

a parallel - plate capacitor has plate separation d . The space between the plates is empty. A battery supplying voltage Vo is connected across the capacitor, resulting in electromagnetic energy U 0 stored in the capacitor. A dielectric

A 4 - kg mass of gas expands adiabatically and does 2 0 J of work. What is the change in the gas's internal energy?

Given the following three vectors: What is the result of ? A . 4 . 3 m 2 B . 7 . 3 m 2 C . 1 0 . 5 m 2 D . 1 2 . 9 m

( a ) What is the average kinetic energy of hydrogen atoms on the 5 5 0 0 C surface of the Sun? J ( b ) What is the average kinetic energy of helium atoms in a region of the solar corona where the temperature is 1 . 7 0 1 0 6 K ? J

An oil slick on water is 1 1 6 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 2 ? ( Assume the index of refraction of water is 1 . 3 3 . )

Example 6 The * * particle has a lifetime of 7 1 0 - 2 3 seconds and a mass of 1 5 3 3 M e V c 2 . ( a ) Calculate the uncertainty in its mass. ( b ) If the average human lifespan is around 7 0 years, is it safe to say there is no uncertainty in your mass?
Example 6 The * * particle has a lifetime of 7 1

Which of the following can increase a participant's base of support? A: A widened stance ( e . g . utilizing the horse stance in martial arts ) B: Additional points of contact ( e . g . 3 - point or 4 - point stance in football ) C: Both a widened stance and additional points of contact D: None of these answers are correct
Which of the following can increase a

A manometer consists of a u shaped tube containing a liquid. One side is connected to the apparatus and the other is open to atmosphere. Suppose the liquid is mercury, the external pressure is 1 atm, and the open side equals the side connected to the apparatus. ( a ) draw the set - up for this experiment. ( b ) what is the pressure in the

One loudspeaker is generating 5 0 dB of sound intensity level. If another identical loudspeaker is added, the total sound intensity level will be ( a ) between 5 0 dB and 5 5 dB , ( b ) between 5 5 dB and 6 0 dB , ( c ) between 6 0 dB and 7 0 dB , ( d ) between 5 0 dB and 6 0 dB , ( e ) between 4 0 dB and 5 0 dB ,
One loudspeaker is generating 5 0 dB of sound

Two coherent light sources emit electromagnetic waves with a wavelength of = 1 . 5 m . The waves reach points P and Q on a screen, with distances from source 1 and source 2 being l 1 and l 2 , respectively, leading to interference fringes. What is the light intensity at points P and Q ? a ) Bright P and bright Q b ) Dark P and bright Q c ) Dark P

Showing 100 - 200 of 1500
  • 2 / 15