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Physics Questions and Answers November 14, 2019

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A voltage will be induced in a wire loop when the magnetic field within that loop is at righ angles to the electric field stays the same aligns with the electric field changes.
A voltage will be induced in a wire loop when the

History Bookmarks Window Help Yahoo The Ultimate . . . cle & Fitness Personal - Web. - Web - Server 2 2 2 0 2 E Q CO + i . When radio waves try to pass through a city, they encounter thin vertical slits: the separations between the buildings. This causes the radio waves to diffract. In this problem, you will see how different wavelengths diffract
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The beam in a cathode - ray tube is composed of Group of answer choices electrons. photons. both of these neither of these

Two parallel plates have equal but opposite charges. The electric field lines near the center of the plates are perpendicular to the plates and point toward the positive plate. are perpendicular to the plates and point toward the negative plate. are parallel to the plates. do not exist.

A friend of yours is loudly singing a single note at 4 1 4 HzHz while racing toward you at 2 6 . 2 m / sm / s on a day when the speed of sound is 3 4 5 m / sm / s .

The object with a diameter closest to a neutron star is _ _ _ _ . Question 7 0 options: the Sun a small city a football stadium the Earth

. Suppose future technology can realize a deep tunnel for bullet trains under the Pacific Ocean, linking China and the United States. If air resistance and rail friction can be minimized, which of the following statements must be false? A . The train can utilize Earth s gravity for acceleration and deceleration B . The train can use less energy

1 5 . A projectile is launched at speed \ ( v _ { 1 } \ ) from ground level at an angle \ ( 7 5 . 0 ^ { \ circ } \ ) above the horizontal and lands a distance \ ( D \ ) away from its launcher. If the horizontal component of the projectile's initial velocity is tripled without changing the initial speed, how far from the launcher will the
1 5 . A projectile is launched at speed \ ( v _ {

1 . a ) . State two advantages of compound pendulum over simple pendulum. ( 2 marks ) b ) . Explain how a body can have both rotational and translational kinetic energies.

A 4 . 9 - kg mass hung from a spring ( k = 2 0 N m ) , displaced slightly from its equilibrium position, and released. What is the period of vibration?
A 4 . 9 - kg mass hung from a spring ( k = 2 0 N

Temperature is the measure of q , energy associated with molecular motion. thermal equilibrium kinetic heat potential
Temperature is the measure of q , energy

1 . An antiproton is an atomic particle that hasA ) the mass of a proton and the charge of an electron.B ) the mass of an electron and the charge of a protonC ) the mass of a neutron and the charge of a proton.D ) the mass of a proton and the charge of a neutron.E ) the mass of an electron and the charge of a positron.

A layer of liquid sits on top of the horizontal surface of a transparent solid. For a ray traveling in the solid and incident on the interface of the two materials, the critical angle is 4 7 . 3 . What is the polarizing angle if the ray is traveling in the liquid

A candle 5 . 0 0 cmcm tall is 3 9 . 2 cmcm to the left of a plane mirror.

for the squid giant axon, compute the size of the current pulse ( magnitude and pulse width ) necessary to raise the membrane potential from its resting value of - 6 0 mv to - 4 0 mv and then back to its resting potential. neglect any changes in k + and na + conductance from

What does the quantity ( Kf - Ki ) represent. ( Kf - Ki ) represents the Kinetic energy lost. Kf equals final kinetic energy and Ki equals initial kinetic energy.

ecause atmospheric pressure is about 1 0 5 N / m 2 and the area of a person s chest is about 0 . 1 3 m 2 , the force of the atmosphere on one s chest is around 1 3 , 0 0 0 N . In view of this enormous force, why don t our bodies collapse?

a copper ring is pulled up a bar magnet, which way will the current, if viewed from above, move throughout the ring

A piece of aluminum with a mass of 1 kg and density of 2 7 0 0 kg / m 3 is suspended from a string and then completely immersed in a container of water. The density of water is 1 0 0 0 kg / m 3 Determine the buoyant force exerted on the metal by the water Determine the tension in the string after the metal is immersed in the water. If only half of

A capacitor is charged to 1 coulomb; the capacitance is 9 . 0 0 1 0 5 farads. Then a switch is closed which puts the capacitor in a closed circuit with a resistor; the resistance is 7 . 2 0 1 0 1 ohms. Calculate the charge on the capacitor after 1 . 0 0 milliseconds. ( 1 ms = 0 . 0 0 1 s ) ( in C ) 1 5 . A 0 . 1 5 4 8 B 0 . 2 0 5 9 C 0 . 2 7 3 9 D

When two waves cross each other, maximum constructive interference will occur in plac waves have two crests meeting a crest and a node meeting a crest and a trough meeting a crest and an antinode meeting
When two waves cross each other, maximum

A fixed amount of ideal gas is compressed isothermally . What are the signs of the work done , the change in internal energy , and the heat exchanged with the surroundings , according to the sign conventions used in this course ? Group of answer choices

A wire of external radius b is made of copper. The wire is hollow; it has a cylindrical hole of radius a centered along its entire length. The wire carries a current I that is uniformly distributed through the copper shell of thickness ( b - a ) . ( a ) ( + 5 ) Calculate the magnetic field strength B ( r ) in the hole, at a radius r < a . ( b ) (

Light of wavelength 0 . 3 8 nm creates a first order interference maximum when it is incident on a crystal at a grazing angle of 3 4 . 8 from the surface. Determine the interatomic spacing of the Bragg planes of the crystal. Answer in nanometers.

Question 7 0 X - rays are characterized as: charged paricles electromagnetic wave with short wavelengths electromagnetic waves with high frequencies a . 1 only b . 1 and 2 only c . 2 and 3 only d . 1 , 2 , and 3 Lo
Question 7 0 X - rays are characterized as:

Styrofoam has a density of \ ( 3 0 0 \ mathrm { ~kg } / \ mathrm { m } ^ { 3 } \ ) . What is the maximum mass that can hang without sinking from a 9 0 . 0 cm - diameter Styrofoam sphere in water? For general problem - solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Floating bowling ball. Part A Assume the
Styrofoam has a density of \ ( 3 0 0 \ mathrm {

Calculate the temperature ( in K ) for which the ratio of free protons to free neutrons in the early stages of the universe would have been 6 . 9 , assuming their distributions are fully thermalized ( governed by Boltzmann statistics ) . K
Calculate the temperature ( in K ) for which the

A seesaw with a mass of 5 kg has one block of mass 1 0 kg two meters to the left of the fulcrum and another block 0 . 5 m to the right of the fulcrum. If the seesaw is in equilibrium, a . find the mass of the second block. b . find the force exerted by the fulcrum.

A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed ? 2 v 0 . The constant horizontal force applied by the woman: thas the same magnitude as the weight of the box. is greater than the weight of the box. thas the same magnitude as the total force which resists the
A woman exerts a constant horizontal force on a

A 4 . 5 0 - k g block is placed on top of a 1 2 . 0 - k g block that rests on a frictionless table. The coefficient of static friction between the two blocks is 0 . 6 5 0 . What is the maximum horizontal force that can be applied before the 4 . 5 0 - k g block begins to slip relative to the 1 2 . 0 - k g block, if the force is applied to each of
A 4 . 5 0 - k g block is placed on top of a 1 2 .

A beam, uniform in mass, M = 6 kg and length L = 4 m , hangs by a cable supported at point B , and rotates without friction around point A . On the end far of the beam, an object of mass m = 4 kg is hanging. The beam is making an angle of = 1 5 at point A with respect to the + x - axis. The cable makes an angle = 2 1 with respect to the - x - axis
A beam, uniform in mass, M = 6 kg and length L =

By how much does the air pressure in a house increase if the house is sealed and the air temperature increases from 1 0 . 7 C to 1 8 . 5 C ? The initial air pressure is 1 . 0 0 atmosphere.

Which of the following is an incorrect statement? Power can be defined as . . . Scalar product of work and time Scalar product of force and velocity Rate at which the work is done None of the options
Which of the following is an incorrect statement?

Americium, atomic number 9 5 , doesn t exist in nature; it is produced in nuclear reactors. An isotope of americium, 2 4 1 Am , is part of the sensing circuit in most smoke detectors. 2 4 1 Am decays by emitting an alpha particle. The daughter nucleus is

What is the resistivity of a wire of 5 - gauge wire ( A = 1 6 . 8 1 0 6 m 2 ( A = 1 6 . 8 1 0 6 m 2 ) , 5 . 0 0 m length, and 5 . 1 0 m 5 . 1 0 m resistance?

A ball with mass m = 0 . 1 kg is traveling along the positive x direction with vx = 3 0 m / sec . It is hit by an impulse J = 3 N sec along the positive y direction. Its final speed is A . 6 0 m / sec B . 9 0 m / sec C . 3 0 2 m / sec D . 6 0 / 2 m / sec E . 3 0 / 2 m / sec

The magnetic field of an electromagnetic wave in a vacuum is given by B ( z , t ) = ( 3 . 0 0 T ) s i n { 1 0 7 x - t } where x is in m and t is in s . a . What is the wave's speed of propagation? What is the wave's frequency f and angular frequency ? b . What is the wavelength? What type of EM wave is this? ( in what region of the EM spectrum is
The magnetic field of an electromagnetic wave in

Two docks are on the same river, separated by 4 . 8 km . The river current is flowing at 6 . 8 k m h r . You have a small boat that can travel at a speed of 1 0 . 2 k m h r relative to the water. Starting at the first dock, you travel 4 . 8 km downstream to the second dock and then immediately turn around and travel 4 . 8 km upstream back to the
Two docks are on the same river, separated by 4 .

Gmail Youtube Maps 1 4 . [ - / 1 Points ] An anti - reflective film ( n = 1 . 4 7 , thickness t = 8 4 . 0 n m ) is applied to a glass camera lens ( n = 1 . 5 8 ) . This will result in destructive interference for reflected light of which wavelength? 3 7 5 nm 4 9 4 nm 3 4 6 nm 4 0 0 . nm 6 6 7 nm 5 6 3 nm 7 0 6 nm 6 3 7 nm 1 6 3 nm 4 5 9 nm 5 2 4
Gmail Youtube Maps 1 4 . [ - / 1 Points ] An anti

A force is applied to a bowling ball. In order to calculate the torque created by the force, you also need to know the location and orientation of the axis of rotation of the ball. the moment of inertia of the ball. the mass of the ball. the angular speed of the ball. the kinetic energy of the ball.
A force is applied to a bowling ball. In order to

Question 6 4 pts The circuit shown below has the following values for its components: V = 1 5 V , R 1 = 2 0 , R 2 = 1 5 , and R 3 = 1 3 . What is the current flowing through R 2 ? Report your answer in units of milliamperes. For example if your calculation produces a value of 0 . 1 2 3 A , first convert units as 1 2 3 mA , then enter your answer
Question 6 4 pts The circuit shown below has the

An astronaut weighs 4 5 0 . 0 N in PlanetB, what would be her weight on PlanetA? ( Rb = 3 Ra and Mb = 4 Ma )

The helicopter in the drawing is moving horizontally to the right at a constant velocityV. The weight of the helicopter is W = 5 3 8 0 0 N . The lift force L generated by the rotating blade makes an angle of 2 1 . 0 \ deg with respect to the vertical. ( a ) What is the magnitude of the lift force? ( b ) Determine the magnitude of the air

Question 9 4 pts A uniform solid disk has a mass of 5 kg and a radius of 0 . 4 m . What is the moment of inertia of the disk about an axis through its center, perpendicular to its surface? Answer: q , k g m 2 Question 1 0 4 pts A system consists of two objects connected to a rigid rod that is massless. The first object, with a mass of 2 kg is
Question 9 4 pts A uniform solid disk has a mass

blood is pumped from the heart at a rate of 5 . 0 L / min into the aorta ( of radius 1 . 0 cm ) . determine the speed of blood through the aorta.

4 4 ) Which of the following statement about a typical atomic nucleus is correct? Group of answer choices A ) The number of neutrons is equal to the number of protons. B ) It contains protons, neutrons, and neutrinos. C ) It usually contains more protons than neutrons. D ) It has a typical radius on the order of 1 0 - 1 5 m . E ) It has a typical

6 3 ) An unknown tuning fork is sounded along with a tuning fork whose frequency is 2 5 6 . Hz and a beat frequency of 3 . Hz is heard. What is the frequency of the unknown tuning fork? 6 3 ) _ _ _ _ _ _ A ) It must be 2 5 9 Hz . B ) It could be either 2 5 3 Hz or 2 5 9 Hz; there is no way to tell. C ) It must be 2 5 3 Hz . D ) It must be 2 5 6 Hz

An object moves with constant acceleration 4 . 9 5 m / s 2 and over a time interval reaches a final velocity of 1 3 . 8 m / s . ( a ) If its original velocity is 6 . 9 0 m / s , what is its displacement during the time interval? 0 1 4 . 4 m ( b ) What is the distance it travels during this interval? 0 1 4 . 4 m ( c ) If its initial velocity is 6 .

Who is the god of the Nile? Osiris Amun Amon - Re Anubis

Determine the energy stored in a 8 . 7 5 1 0 - 7 H inductor that carries a 1 . 8 0 - A current. A ) 2 . 1 1 1 0 - 8 J B ) 3 . 7 8 1 0 - 8 J C ) 1 . 0 9 1 0 - 7 J D ) 1 . 4 2 1 0 - 6 J E ) 6 . 6 0 1 0 - 6 J
Determine the energy stored in a 8 . 7 5 1 0 - 7

What are the units of angular speed ?

a pendulum swings back and forth 1 0 times in 8 s . It swings through a total horizontal distance of 4 0 cm

According to the USDA, a whole cooked chicken is safe to serve when its internal temperature reaches Question 3 5 options: 1 1 5 F . 1 2 5 F . 1 4 5 F . 1 6 5 F .

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of + 3 . 0 C
How many electrons must be removed from an

A mass on a spring in SHM has amplitude A and period T . What is the net displacement of the mass after a time interval T ? A spring can be stretched a distance of 6 0 cm with an applied force of 1 N . If an identical spring is connected in parallel with the first spring, and both are pulled together, how much force will be required to stretch
A mass on a spring in SHM has amplitude A and

Find the frequency of a yellow light that has a wave length of 6 0 0 nm . Please enter your answer in the units of peta - Hertz ( 1 0 1 5 ( H z ) ) and round to the first decimal.
Find the frequency of a yellow light that has a

Calculate the speed of an car ( a ) If it is at rest ( b ) It has covered ( 2 + 0 . 1 * 2 4 ) m in ( 3 + 0 . 0 1 * 2 4 ) seconds.

It is found that an engine discharges 1 0 1 . 0 J while absorbing 1 3 3 . 0 J each cycle of operation. ( a ) What is the efficiency of the engine? e = ( b ) How much work ( in J ) does it perform per cycle? J

what can a deficiency in iron lead to

Superwoman decides to leap over a tall building in a single jump. She has a mass of 7 2 . 0 kkg and takes off with an initial velocity of 5 0 m / s at an angle of 6 0 degrees from the ground. a . ) Calculate her initial kinetic energy b . ) What is her maximum height reached assuming there is no air resistance c . ) If the building is 1 0 0 m

\ table [ [ , Mass,Volume ] , [ Green object, 6 0 0 g , 8 0 0 c m 3
\ table [ [ , Mass,Volume ] , [ Green object, 6 0

a light beam glycerin find the index

Part A To what potential should you charge a 1 . 0 0 FF capacitor to store 1 . 0 0 JJ of energy?

Only 3 3 . 0 % of the intensity of a polarized light wave passes through a polarizing filter. Part A What is the angle between the electric field and the axis of the filter? 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 to

Prob 2 8 : A 9 . 7 5 - m ladder with a mass of 2 3 . 2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 2 4 5 N . At the instant the top of the ladder leaves the ground, the ladder experiences an angular acceleration of 1 . 8 0 rad / s 2 about an axis passing through the bottom end of

A small helium - neon laser emits red visible light with a power of 5 . 2 0 mW in a beam of diameter 2 . 9 0 mm .
A small helium - neon laser emits red visible

points ) . Calculate the wavelength ( i ) of a 6 0 Hz electromagnetic ( EM ) wave;Answer: ( a ) 9 . 1 x 1 0 ^ ( - 8 ) m . ( b ) 8 . 1 x 1 0 ^ ( 2 ) m . ( c ) 5 . 1 x 1 0 ^ ( 5 ) m . ( d ) 5 : 0 x 1 0 1 ( 6 ) m . ( e ) 8 . 2 x 1 0 ( - 6 ) m . ( f ) ( 1 1 ) the wavelength of a 8 9 . 3 MHZ FM radio wave.Answer: ( a ) 9 . 1 x 1 0 ^ ( - 8 ) m . ( b ) 8

Explain the advantages of passing the X - rays through this aluminium plate prior to their being incident on a patient

The length of nylon rope from which a mountain climber is suspended has a force constant of ( a ) What is the frequency at which he bounces, given his mass plus and the mass of his equipment are 9 0 . 0 kg ? Ignore the change in gravitational potential energy after the cord begins to stretch. ( b ) How much would this rope stretch to break the

An organ pipe is 1 1 2 cm long. What is the wavelenght if the pipe is closed in one end and n = 2 ? An organ pipe is 1 1 2 cm long. What is the wavelenght if the pipe is open at both ends and n = 2 ?

Does centrifugul distortion increase of decrease the sppeartion between adja cent rotational energy levels? Explain...
Does centrifugul distortion increase of decrease

what is the most sensitive organ to radiation

A 2 1 0 mWmW vertically polarized laser beam passes through a polarizing filter whose axis is 3 8 from horizontal.

2 - Sally challenges you to a race. On the first turn, you run off the course and your car strikes a large bale of hay. Your car still produces 8 9 0 0 N of force, but now it accelerates at only 6 m s 2 . What is the mass of your car now that the bale of hay is stuck to it ? Solution:
2 - Sally challenges you to a race. On the first

A \ ( 1 . 0 - \ mathrm { cm } \ ) - diameter pipe widens to 2 . 0 cm , then narrows to 5 . 0 mm . Liquid flows through the first segment at a speed of \ ( 7 . 0 \ mathrm { ~m } / \ mathrm { s } \ ) . Part A What is the speed in the second segment? Express your answer with the appropriate units. View Available Hint ( s ) \ [ 1 \ ] Part B What is
A \ ( 1 . 0 - \ mathrm { cm } \ ) - diameter pipe

what is the angular diameter in Ark seconds of an object that has a linear diameter of 2 3 M and distance of 1 5 0 0 m

5 9 . Boris is a cobbler in the middle 1 6 th century in Great Britain. He enjoys an inexpensive beverage containing xanthenes that is common for his time period. What beverage does Boris drink? a ) Black tea b ) Coffee c ) Green tea d ) Hot chocolate

A tank whose bottom is a mirror is filled with water to a depth of 1 9 . 6 cm . A small fish floats motionless a distance of 7 . 7 0 cm under the surface of the water.
A tank whose bottom is a mirror is filled with

Determine F B . Express your answer using two significant figures. Two snowcats tow a housing unit to a new location at McMurdo Base, Antarctica, as shown in the figure ( Figure 1 ) . The sum of the forces vec ( F ) A and vec ( F ) B exerted on the unit by the horizontal cables is parallel to the line L , and F A = 4 3 0 0 N . Figure 1 of 1
Determine F B . Express your answer using two

( 3 marks ) An egg is taken out of a refrigerator whose temperature is 4 degrees C and placed into a pot of boiling water. The internal temperature of the egg at time t is given by T ( t ) , and the temperature obeys Newton's law: d T d t = - k ( T - T m ) where T m is the temperature of the boiling water ( 1 0 0 degrees C ) and k > 0 is a
( 3 marks ) An egg is taken out of a refrigerator

9 Multiple Choice 1 point The unit of angular momentum is r a d s 2 k g * m 2 s k g * m 2 s 2 kg . m ^ 2
9 Multiple Choice 1 point The unit of angular

Classically, cooling a gas of atoms to a temperature of 0 k should result in the complete creation of motion for all atoms in b the her however in reality there will always be some small but non zero amount of motion remaining in the gas

when must you reheat food to 1 6 5 degrees

A spherical weather balloon is filled with hydrogen until its radius is 3 . 1 0 m . Its total mass including the instruments it carries is 1 8 . 0 kg . ( a ) Find the buoyant force acting on the balloon, assuming the density of air is 1 . 2 9 kg / m 3 . kN ( b ) What is the net force acting on the balloon and its instruments after the balloon is

A certain carbon monoxide molecule consists of a carbon atom of mass mc = 1 2 u and an oxygen atom of mass mo = 1 7 u that are separated by a distance of d = 1 1 0 pm , where " u " is an atomic unit of mass

Please dont solve just one. I need both
Please dont solve just one. I need both

The half - life of 1 8 N is 0 . 6 2 s . What is the decay constant for this isotope? a . The decay constant is not defined for a half - life of less than one second. b . 1 . 7 1 0 1 1 Ci c . 1 . 1 s 1 d . 0 . 4 3 s 1

he principle of reversibility states that light will follow exactly the same path if its direction of travel is reversed. This works for reflection. Does the principle of reversibility work for refraction?

What % error would be made if the moment of inertia of the pulley is ignored? [ Hint: The tensionsFTA and FTB are not equal. ]

A certain planet has an escape speed VV . If another planet of the same size has twice the mass as the first planet, its escape speed will be V / 2 V / 2 . VV . V / 2 V / 2 . 2 V 2 V . 2 V 2 V .

The first law of thermodynamics relates the heat transfer into or out of a system to the change of internal and the work done on the system. lauren.ray@eagles.oc . edu 8 O 7 5 - 7 7 - C 0 - 4 B - A 2 5 1 - 5 3 2 3 4 How much heat, in joules, is transferred into a system when its internal energy decreases by 1 2 5 J while it was performing 3 2 . 5

1 9 . Which statement is true about the three water towers on campus? Answer a . The water level in the stadium tower is highest. b . The water level in the Stuckeman tower is the highest. C . The water level in the golf course tower is the highest. d . The water level of all three towers are at the same level. e . All of the above

Assume Lake Ontario contains 1 . 6 0 1 0 1 2 m 3 of water, and assume the water's density is that of water at 2 0 C and 1 atm. ( a ) How much energy ( in J ) is required to raise the temperature of that volume of water from 1 3 . 4 C to 2 2 . 4 C ? J ( b ) How many years would it take to supply this amount of energy by using a power of 1 , 2 0 0

A heater draws 2 0 A when connected to a 1 1 0 - V line. If the electric power costs 2 0 cents per kilowatt hour, the cost of running the heater for 1 0 hours is _ _ _ _ _ _ _ . Group of answer choices $ 0 . 4 4 $ 4 . 4 0 $ 1 . 1 0 $ 1 1 . 0 0 none of the above

An organ pipe is open, at both ends. It is producing sound at its n = 2 harmonic, the frequency of which is 3 3 1 Hz . Take the speed of sound to be 3 4 4 m / s . What is the length of the pipe?

What rays mist pass through the focus? A . All incident rays B . All paraxial rays C . All paraxial incident rays D . All real rays E . All ryas

The IR absorption spectrum of 1 H 3 5 Cl has its strongest band at 8 . 6 5 1 0 1 3 Hz and D 0 = 4 . 4 3 eV . a . Find De for 1 H 3 5 Cl b . Find D 0 for 2 H 3 5 Cl

A ball of mass m = 0 . 5 0 0 kg is thrown upward, rising h = 1 0 . 0 m above the point at which it was released. Compute the average force exerted on the ball by the hand, if the hand moves through a distance of d = 2 5 . 0 cm as the ball is accelerated. Part 1 + Give an algebraic expression for finding the average force exerted on the ball by the

Luminosity distance describes the distance to a distant galaxy as Group of answer choices the distance the light traveled from being emitted until being observed by us on Earth. the distance to the cosmological horizon. the distance between the distant galaxy and the Milky Way when the light was emitted. the physical distance between the distant

A spherical balloon has a radius of 6 . 7 5 mm and is filled with helium. The density of helium is 0 . 1 7 9 kg / m 3 kg / m 3 , and the density of air is 1 . 2 9 kg / m 3 kg / m 3 . The skin and structure of the balloon has a mass of 9 7 0 kgkg . Neglect the buoyant force on the cargo volume itself.

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