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Physics Questions and Answers October 06, 2019

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How far away is the center of the Virgo Cluster? 2 7 thousand light years. 5 4 million light years. 2 5 0 million light years. 2 . 5 million light years.
How far away is the center of the Virgo Cluster?

What is the acceleration due to gravity near the surface of a planet where a 7 5 cm long simple pendulum has a period of 1 . 7 3 8 s ? 9 8 3 m s 2 0 . 2 4 9 m s 2 0 . 0 5 7 m s 2 9 . 8 m s 2
What is the acceleration due to gravity near the

Water flows in the horizontal pipe shown in the figure. At point A the area is 2 5 . 0 c m 2 and the speed of the water is 2 . 0 0 m s . The fluid in the manometer is mercury, which has a density of 1 3 , 6 0 0 k g m 3 and it rises 2 . 2 cm . We can treat the flowing water as as ideal fluid having a density of 1 0 0 0 k g m 3 . What is the speed
Water flows in the horizontal pipe shown in the

Four Hydrogen atoms has _ _ _ _ _ one Helium atom Group of answer choices the same mass of more mass than less mass than

line has a slope of - 2 / 3 . line n is parrallell to line m . what is the slope

Consider two transverse waves y 1 = A 7 points s i n ( k x - t + ) and 2 t + ) , propagating on two identical strings ) = ( 2 under the same force of tension. Determine the ratio of the power transmitted by the strings.
Consider two transverse waves y 1 = A 7 points s

To date, physicists have investigated the behavior of matter and energy at temperatures as high as those that existed in the universe as far back as 1 0 - 1 0 second 3 0 0 , 0 0 0 years 3 0 0 years 3 minutes 1 million years
To date, physicists have investigated the

The biggest stuffed animal in the world is a snake 4 2 0 m long, constructed by Norwegian children. Suppose the snake is laid out in a park as shown in the figure below, forming two straight sides of a 1 0 2 angle, with one side 2 2 5 m long. Olaf and Inge run a race they invent. Inge runs directly from the tail of the snake to its head, and Olaf
The biggest stuffed animal in the world is a

Your last submission is used for your score. ASK YOUR TEACHER [ - / 1 Points ] SERCP 1 1 2 3 . CQ . 0 1 4 . A person spear fishing from a boat sees a stationary fish a few meters away in a direction about 3 0 below the horizontal. To spear the fish, and assuming the spear does not change direction when it enters the water, where should the person
Your last submission is used for your score. ASK

Practice Problems # 6 Physics 1 2 1 Autumn 2 0 2 4 The figure below is the potential - energy diagram for a 5 0 0 g particle that is released from rest at A . What are the particle's speeds at B , C , and D ? It's been a great day of new, frictionless snow. Julie starts at the top of the 6 0 slope shown in the figure below. At the bottom, a
Practice Problems # 6 Physics 1 2 1 Autumn 2 0 2

If a mass of 2 0 . 2 9 kg acts downward 0 . 2 9 m from the axis of rotation on one end of a board and another force of 8 5 N also acts downward, what is the moment arm of the second force to balance this system? a . 0 . 6 8 m b . 5 8 m c . 0 . 0 6 9 m d . The system is not balanced; angular rotation will occur.
If a mass of 2 0 . 2 9 kg acts downward 0 . 2 9 m

( 5 pts ) 1 9 , The isotope ? 1 3 2 5 A l undergoes + ( positron ) decay. How many neutrons are in the daughter nucleus produced by this decay? ( a ) 1 2 ( b ) 1 3 ( c ) 1 4 ( d ) 1 6 ( e ) 2 5 ( f ) none of the above answers
( 5 pts ) 1 9 , The isotope ? 1 3 2 5 A l

The figure shows an arrangement known as a Helmholtz coil. It consists of two circular coaxial coils, each of N = 1 6 1 turns and radius R = 2 4 . 3 c m , sepatated by a distance s = R . The two coils carry equal currents i = 8 . 6 1 m A in the same direction. Find the magnitude of the net magnetic field at P , midway between the coils. Number
The figure shows an arrangement known as a

Part A A rocket with mass \ ( 7 . 0 0 \ times 1 0 ^ { 3 } \ mathrm { ~kg } \ ) is in a circular orbit of radius \ ( 7 . 5 0 \ times 1 0 ^ { 6 } \ mathrm { ~m } \ ) around the earth. The rocket's engines fire for a period of time to increase that radius to \ ( 8 . 8 0 \ times 1 0 ^ { 6 } \ mathrm { ~m } \ ) , with the orbit again circular. What is
Part A A rocket with mass \ ( 7 . 0 0 \ times 1 0

Two objects with the same masses, are situated at a distance of 1 m . They interact with a force of 6 . 6 7 1 0 - 9 N . Calculate one of the two masses. 1 0 0 kg 8 0 kg 4 0 kg
Two objects with the same masses, are situated at

A transverse wave on a cable can be modeled by the equation y ( x , t ) = 0 . 3 4 0 sin ( 1 . 2 0 x + 8 8 . 6 t ) , where x and y are in meters and t is in seconds. Imagine the cable has a small mark on it at x = 0 . ( a ) What is the time interval ( in ms ) between the first two instants when this mark has a position of y = 0 . 1 7 5 m ? ( b )

Ruby, with mass 4 8 . 2 kg , is trying to reach a box on a high shelf by standing on her tiptoes. In this position, half her weight is supported by the normal force exerted by the floor on the toes of each foc as shown in part A of the figure below. This situation can be modeled mechanically by representing the force on Ruby's Achilles tendon with
Ruby, with mass 4 8 . 2 kg , is trying to reach a

Consider a series RC circuit for which R = 2 . 0 MW , C = 1 0 . 0 F , and e = 1 0 V . Find the charge on the capacitor after 5 . 0 seconds?

When you connect a battery with emf 9 . 0 0 VV to a resistor of resistance 1 2 . 0 , energy is dissipated in the resistor at the rate of 6 . 5 4 WW . Find the current in the circuit. Express your answer with the appropriate units. Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and

A 5 5 5 pFpF capacitor is charged to 1 3 5 VV and then quickly connected to a 1 5 5 mHmH inductor. Part A Determine the frequency of oscillation. Express your answer with the appropriate units. 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

A flat circular loop of radius 0 . 1 0 m is rotating in a uniform magnetic field of 0 . 2 0 T . When the plane of the loop and the magnetic field vector are parallel, the magnetic flux through the loop is a ) 5 . 5 x 1 0 - power 3 T m power 2 b ) 0 T . M power 2 c ) 6 . 3 x 1 0 - power 3 T . m power 2 d ) 3 . 1 X 1 0 - power - 3 T m power 2

At the surface of Jupiter's moon Io , the acceleration due to gravity is 1 . 8 1 m / s 2 m / s 2 . Part A If a piece of ice weighs 4 0 . 0 NN at the surface of the earth, what is its mass on the earth's surface? Express your answer in kilograms. Activate to select the appropriates template from the following choices. Operate up and down arrow for

A uniform electric field has a magnitude of 1 0 N C and is directed upward. A charge brought into the field experiences a force of 5 . 0 N downward. The charge must be: - 2 . 0 C . + 5 0 C . - 0 . 5 C . - 5 0 C . + 0 . 5 C .
A uniform electric field has a magnitude of 1 0 N

A resistor RR and another resistor 2 . 0 0 RR are connected in series across a battery. If heat is produced at a rate of 1 2 . 0 WW in RR , then in 2 . 0 0 RR it is produced at a rate of

A guitar string has a mass per unit length of 1 2 . 0 g / m and experiences a tension of 3 9 2 6 N . a . How fast does a wave travel on the string? b . If the wave on the string has a wavelength of 6 5 . 0 cm , what is its frequency?

A speaker fixed to a moving platform moves towards a wall, emitting a steady sound with a frequency of 2 5 0 Hz . How fast should the platform move, for the person to detect a beat frequency of 4 Hz ? Take the speed of sound to be 3 4 4 m / s

5 pt A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is s = 0 . 2 5 , and the coefficient of kinetic friction is k = 0 . 1 9 . The angle of elevation of the inclined plane is increased slowly from the horizontal. At what value of does the block begin to slide? 1 6 . A 0 . 0 0 4 4 B 1 4 C 1
5 pt A block is at rest on an inclined plane

After Raven frees the race car, it continues around the track until the battery runs out. If the angle rotates another 2 3 3 radians from where it was freed, how many total laps did the race car make around the track?

Three barrels of equal mass are arranged at rest between two inclined platforms, as per the diagram above. The inclination angle of the platforms is then slowly decreased, such that they would form a single horizontal platform at \ ( \ theta = 0 ^ { \ circ } \ ) . At what angle of inclination would you expect the two bottom barrels ( labeled A and
Three barrels of equal mass are arranged at rest

Consider a radio wave and a light wave propagating in vacuum, they must have identical Group of answer choices frequencies. wavelengths. speeds. all of the above none of the above

A photon of wavelength 0 . 0 4 3 4 nmnm strikes a free electron and is scattered at an angle of 3 5 . 0 from its original direction. Find the change in the wavelength of this photon. Express your answer in nanometers. Find the wavelength of the scattered light. Express your answer in nanometers. Find the change in energy of the photon. Express

What is joule the unit of energy in terms of basic SI units 1 J = 1 kg 2 m 2 / s 2 1 J = 1 kg 2 m 2 / s 2 1 J = 1 kgm 2 / s 3 1 J = 1 kgm 2 / s 3 it is unitless 1 J = 1 kgm 2 / s 2 1 J = 1 kgm 2 / s 2 1 J = 1 kgm / s 2 1 J = 1 kgm / s 2

A charge of + 1 . 0 0 1 0 - 6 C is located 1 0 cm from a charge of - 4 . 0 0 1 0 - 6 C . ( a ) What is the magnitude of the force exerted on each charge? N ( b ) On a drawing, indicate the directionshf the forces acting on each charge. Choose File No file chosen
A charge of + 1 . 0 0 1 0 - 6 C is located 1 0 cm

1 . A _ _ _ is a type of battery that is used in space vehicles. This type of battery cannot _ _ _ energy . 2 . In a _ _ _ battery , there are 6 cells connected in series. 3 . A _ _ _ battery is used in flashlights

Match the following telescope types. Prompts An optical wavelength telescope that uses a mirror to to focus the light An optical wavelength telescope that uses a lens to to focus the light A telescope that operates in wavelengths slightly shorter ( bluer ) than optical light A telescope that operates in extremely long wavelengths such as those
Match the following telescope types. Prompts An

You are presented with the circuit shown in the figure below, for which you know the values of V _ ( 1 ) , V _ ( 2 ) , R _ ( 1 ) , and R _ ( 2 ) . Answer the following questions as functions of the given variables:
You are presented with the circuit shown in the

A 0 . 7 5 0 kg hammer is moving horizontally at 8 . 5 0 m / s when it strikes a nail and comes to rest after driving it 1 . 0 0 cm into a board.

In a hydrogen atom, a given electron has orbital quantum number = 7 . How many values can m have? Question 1 options: 6 7 1 5 9 8 3 3

The World s Fastest Turbine The drill used by most dentists today is powered by a small air turbine that can operate at angular speeds of 3 5 0 , 0 0 0 rpm . These drills, along with ultrasonic dental drills, are the fastest turbines in the world far exceeding the angular speeds of jet engines. Suppose a drill starts at rest and comes up to

The current in the loop flows clockwise when viewed from above. Which pole of the compass needle is attracted to the loop?

circular transverse longitudinal There is a long wire between two posts on a fence. I wiggle the wire left and right and send a wave traveling to the other post. This is a longitudinal wave. A sound speaker has a flat part that vibrates, alternately pushing the air forward and pulling to back. This sends out a wave of high and low pressure air,
circular transverse longitudinal There is a long

A centrifuge spins at 1 5 , 0 0 0 rpan. If the radius of the rotor is 1 5 cm and a particle has a mass of 1 0 c - 1 2 k g . what is the contripetal force acting on the particle?
A centrifuge spins at 1 5 , 0 0 0 rpan. If the

A 2 1 0 mW vertically polarized laser beam passes through a polarizing filter whose axis is \ ( 3 3 ^ { \ circ } \ ) from horizontal. Part A What is the power of the laser beam as it emerges from the filter? Express your answer to two significant figures and include the appropriate units. \ ( P = \ ) mW Incorrect; Try Again; 5 attempts remaining
A 2 1 0 mW vertically polarized laser beam passes

The primary of a step - down transformer has 2 0 5 turns and is connected to a 1 2 0 V RMS line. The secondary is to supply 2 4 A at 7 V . ( a ) Find the current in the primary. ( b ) Find the number of turns in the secondary , assuming 1 0 0 % efficiency.

2 . Compare the concepts of inertia and acceleration when discussing movement.

In SI units, the electric field in an electromagnetic wave is described by E 1 0 0 sin 1 1 . 0 0 1 0 7 xvt 2 y Find ( a ) the amplitude of the corresponding magnetic field oscillations, ( b ) the wavelength l , and ( c ) the fre - quency f .

a hot air baloon contains 6 5 0 0 0 ft ^ 3 of air how many m ^ 3 is this

White light consisting of wavelengths between 3 8 0 nm and 7 5 0 nm is incident on a lead surface. What part of that range of wavelengths will cause photoelectrons to be emitted from the lead surface if work junction = 6 . 6 3 x 1 0 ^ - 1 9 J

given the specific heats of ice and water are cice = 2 0 9 0 j / kg and cwater = 4 . 1 8 6 j / kg celcius respectively and that the latend heats of fusion and vaporization of water are lf = 3 . 3 3 x 1 0 ^ 5

Two positive point charges are 5 . 5 0 cmcm apart. Part A If the electric potential energy is 7 0 . 0 JJ , what is the magnitude of the force between the two charges? Express your answer with the appropriate units. Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to

Two speeding lead bullets, one of mass 1 4 . 0 g moving to the right at 2 6 5 m / s and one of mass 7 . 6 5 g moving to the left at 3 8 0 m / s , collide head - on , and all the material sticks together. Both bullets are originally at temperature 3 0 . 0 \ deg C . Assume the change in kinetic energy of the system appears entirely as increased

Sanjay and Ting, each with a mass of 2 5 kgkg , are riding opposite each other on the edge of a 1 5 0 kgkg , 3 . 0 - mm - diameter playground merry - go - round that's rotating at 1 9 rpmrpm . Each walks straight inward and stops 3 5 cmcm from the center. Part A What is the new angular velocity, in rpmrpm ?

Problem 2 . You are asked to design a di raction grating that will disperse the first - ordervisible spectrumthroughanangularrangeof 2 7 . 0 whenwhitelightisshoneonthegrating. ( a ) At what angles will the first order spectrum begin and end? ( Use the identity sin ( + ) sin cos + cos sin and consider the ratiosin ( + ) / sin to solvefor . ) ( b )

Anne pushes against a brick wall with a force Fa . Barry pushes against the same brick wall with a force Fb = 1 / 2 Fa . The wall remains stationary. How does the work done on the wall compare between the two? Group of answer choices Both do positive work, but Barry does twice the amount of work as Anne. Both do positive work, and they are equal.

When light with a wavelength of 6 0 0 nm is irradiated to a metal surface, the speed of the electrons emitted is 4 x 1 0 ^ 5 m / s . What is the cutoff frequency on this surface?

A 3 5 mF capacitor is connected to an ac source of emf with a frequency of 2 5 0 Hz and a maximum emf of 2 0 . 0 V . If the voltage across the capacitor is zero at time t = 0 , what is the voltage at time t = 3 . 0 ms ? Assume the phase constant is zero. A 3 5 mF capacitor is connected to an ac source of emf with a frequency of 2 5 0 Hz and a

At time t = 0 , a point charge with - 3 . 2 C accelerates very briefly in the direction having an angle 0 . 2 rad with the + x - axis. The magnitude of its acceleration is 4 1 0 9 m s 2 . An electric / magnetic field detector is placed at location A , 5 meters from the electron, as shown in the diagram. A . At what time t 1 does the detector at A
At time t = 0 , a point charge with - 3 . 2 C

The tangential velocity v at a point on a rotating object at a radius r is given by: The tangential velocity v at a point on a rotating object at a radius r r is given by: A A . v = r B . v = r c . v = 2 r D . v = r
The tangential velocity v at a point on a

A light beam has a wavelength of 3 2 0 nm in a material of refractive index 1 . 5 0 . Part A In a material of refractive index 3 . 0 0 , its wavelength will be 4 8 0 nm . 3 2 0 nm . 2 1 3 nm . 1 6 0 nm . 1 0 7 nm .
A light beam has a wavelength of 3 2 0 nm in a

The magnetic field in a region of space is given by B = 0 . 6 4 0 T . The velocity vector of an electron moving at 7 . 6 5 1 0 6 m / s makes an angle of 4 5 . 0 with this field. What are the magnitudes of the following? ( a ) the magnetic force on the electron N ( b ) the electron's acceleration m / s 2

2 ) Monochromatic light with wavelength 6 0 0 nm is incident on a screen with a single slit.. The slit has a width \ ( 9 \ times 1 0 ^ { - 6 } \ mathrm { ~m } \ ) . A screen is placed at \ ( \ mathrm { L } = 3 \ ) meters from the screen. a ) Find the maximum number of fringes that will appear on the screen. b ) How wide is the center BRIGHT
2 ) Monochromatic light with wavelength 6 0 0 nm

I need help explaining how to calculate these two - especially explaining how you find the moment of inertia and why you're adding certain things and where the numbers in the calculations are coming from and everything. Please help explain thoroughly as I struggle to understand the concept. Please don't put in numbers in an equation without
I need help explaining how to calculate these two

what is the value of the angle in the glass between blue and red parts of the refracted beams

A uniform thin rod of length 0 . 6 9 m and mass 4 . 4 kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 4 . 0 g bullet traveling in the rotation plane is fired into one end of the rod. As viewed from above, the bullet's path makes angle = 6 0 with the rod. If the bullet lodges in the rod and
A uniform thin rod of length 0 . 6 9 m and mass 4

A ball collides with a second ball of equal mass ( 2 . 3 kg ) that is initially at rest. If the first ball is initially moving with a velocity of 3 m / s and is no longer moving after the collision, ( 1 ) what is the velocity of the second ball after the collision? ( 2 ) What is the second ball s kinetic energy after the collision?

1 : 3 7 : 5 0 remaining Liscen What pressure does light emitted uniformly in all directions from a 2 0 0 - W incandescent light bulb exert on a mirror at a distance of 5 . 0 m ? 1 . 5 1 0 - 1 0 N m 2 2 . 1 2 1 0 - 9 N m 2 1 . 6 9 1 0 - 8 N m 2 4 . 2 4 1 0 - 9 N m 2 Question 1 8 ( 5 points ) Saved
1 : 3 7 : 5 0 remaining Liscen What pressure does

there are two other phenomena that have force fields, besides magnetism. compare their equations, directions, and the main components affecting their strength

What happens to the kinetic energy of a system of two isolated helium atoms as they initially anproach and why? a The kinetic energy increases because the attractive force between the two helium atoms
What happens to the kinetic energy of a system of

The figure shows a parallel - plate capacitor of plate area A = 1 0 . 3 c m 2 and plate separation 2 d = 6 . 8 4 m m . The left half of the gap is filled with material of dielectric constant 1 = 2 1 . 5 ; the top of the right half is filled with material of dielectric constant 2 = 4 5 . 9 ; the bottom of the right half is filled with material of
The figure shows a parallel - plate capacitor of

A coil with magnetic moment 1 . 4 7 A m 2 A m 2 is oriented initially with its magnetic moment antiparallel to a uniform magnetic field of magnitude 0 . 8 4 5 TT . What is the change in potential energy of the coil when it is rotated 1 8 0 degrees, so that its magnetic moment is parallel to the field?

A simple pendulum is made from a 0 . 9 6 5 - m - long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed?
A simple pendulum is made from a 0 . 9 6 5 - m -

5 and 6 ) A steel plate has dimensions of 4 . 5 0 m by 3 . 5 0 m and a thickness of 3 . 0 0 centimeters. The temperature difference [ T ] between the inner and outer surface of the plate is 3 . 5 C . This problem is like Examples # 1 and # 2 ( pages 2 and 3 ) in Chapter # 1 3 notes. Calculate the heat flow rate H , { J s } through the steel plate.
5 and 6 ) A steel plate has dimensions of 4 . 5 0

As the angle of incidence is increased for a ray incident on a reflecting surface, the angle between the incident and reflected rays ultimately approaches what value? Zero 1 8 0 degrees 9 0 degrees 4 5 degrees None of the above
As the angle of incidence is increased for a ray

Rotation of a Rigid Body ( 4 points each ) A dumbbell - shaped object is composed by two equal masses, m , connected by a rod of negligible mass and length r . If I 1 is the moment of inertia of this object with respect to an axis passing through the center of the rod and perpendicular to it and I 2 is the moment of inertia with respect to an axis

The critical angle for total internal... The critical angle for total internal reflection is the Multiple Choice single angle for which transmission through the boundary is zero. maximum angle of incidence, below which no light is transmitted through the boundary. minimum angle of incidence, above which no light is transmitted through the boundary.
The critical angle for total internal... The

1 . Are the following equations valid with respect to their dimensions? 5 m / s + 1 0 m / s 2 = 1 5 m / s 5 m / s + ( 1 0 m / s 2 ) ( 1 / 2 sec ) = 1 0 m / s

What is the main factor associated with increasing the magnitude of buoyancy?

The coefficient of linear expansion for aluminum is 1 . 8 1 0 - 6 K - 1 . What is its coefficient of volume expansion? 9 . 0 1 0 - 6 K - 1 5 . 8 1 0 - 1 8 K - 1 5 . 4 1 0 - 6 K - 1 3 . 6 1 0 - 6 K - 1
The coefficient of linear expansion for aluminum

How is a Joule defined in terms of other units? Group of answer choices W / s 2 W / s m K W kg W s

Consider the following equation that approximates the smallest angle that two point objects can subtend at a circular aperture of diameter D for a given wavelength . m i n ~~ - - D Which of the following numbers belongs in the blank in the equation? 2 . 1 8 4 1 . 4 9 0 . 1 3 8 1 . 2 2
Consider the following equation that approximates

Suppose some nucleus undergoes decay, releasing 5 . 4 2 MeV of energy. If the daughter product of this reaction is 9 3 X 2 3 7 ( atomic mass = 2 3 7 . 0 4 8 1 6 ) , it will recoil away as the particle leaves. Determine ( a ) the energy of the daughter product and ( b ) the energy of the particle ( atomic mass = 4 . 0 0 2 6 0 3 u ) . Assume that

How large a torque would it take to cause these gyroscopes to precess through an angle of 1 . 2 0 1 0 6 degree during a 5 . 5 hour exposure of a galaxy? Express your answer in newton - meters.

What is the moment of inertia of a thick ring ( Inner radius R i outer Radius R 0 ) rotating about a pivot point along its edge using parallel axis theorem
What is the moment of inertia of a thick ring (

Question 1 2 5 pts Suppose the current in an ideal LC circuit oscillates with a frequency of f 0 . If the inductor is removed and replaced with an inductor having 6 . 8 times the original inductance, by what factor does the frequency change? Fill in the missing numerical factor below. f n e w = f 0
Question 1 2 5 pts Suppose the current in an

A guitar string with mass density = 2 . 4 1 0 - 4 kg / m is L = 1 . 0 4 m long on the guitar. The string is tuned by adjusting the tension to T = 1 1 3 . 1 N .

which statement about energy is correct? 1 . the potential energy of the spring is at a minimum at x = A 2 . the potential energy of the spring is at a minimum at x = 0 3 . the kinetic energy of the block is at a maximum at x = A 4 . the kinetic energy of the block is always equal to the potential energy of the spring 5 . the kinetic energy of the

How much charge flows from a 1 5 . 0 - VV battery when it is connected to a 2 1 . 6 Fcapacitor ?

Question 5 A constant frictional force of 2 5 N acts for 1 5 s on a 6 5 kg skier. What will be the change in skier speed? to . 2 . 0 m / s b . 1 . 2 2 m / s c . 1 2 . 0 m / s d . 6 . 0 m / s

A 1 0 0 0 - V battery, a 3 0 0 0 - resistor, and a 0 . 5 0 - F capacitor are connected in series with a switch. The capacitor is initially uncharged. What is the value of the current the moment after the switch is closed? a . 2 0 0 0 A b . 0 . 8 4 A c . 0 . 3 3 A d . 0 . 3 9 A

An electronic device requires an input 0 0 0 0 0 0 1 0

A particle with a mass of 1 . 9 4 1 0 4 kgkg carries a negative charge of - 3 . 9 0 1 0 8 CC . The particle is given an initial horizontal velocity that is due north and has a magnitude of 3 . 6 7 1 0 4 m / sm / s . What is the magnitude of the minimum magnetic field that will keep the particle moving in the earth's gravitational field in the same

1 . ( a ) During an isochoric ( constant volume ) pressurization of an ideal monatomic gas, 1 0 0 J of heat is added to the gas. What is the work done by the gas, and the change in its internal energy? ( b ) During an isothermal ( constant temperature ) expansion of an ideal monatomic gas, 1 0 0 J of heat is added to the gas. What is the work done

Why is it currently almost impossible to observe the Hawking radiation from a solar mass black hole? The temperature associated with the Hawking radiation is too low. The temperature associated with the Hawking radiation is too high. The Hawking radiation is mostly made of gravitational waves that are too incredibly weak to detect. We do not

A 2 . 5 0 W W beam of light of wavelength 1 2 4 nm n m falls on a metal surface. You observe that the maximum kinetic energy of the ejected electrons is 4 . 1 6 eV e V . Assume that each photon in the beam

The bead starts from rest at the highest point where = 0 . Find ( a ) the speed and ( b ) the magnitude of the constraint force ( N ) as the bead slides down

A laser produces light of wavelength 5 7 5 nmnm in an ultrashort pulse.

A system of two objects has Ktot = 8 J and Uint = - 1 J .

A 1 4 . 5 - m uniform ladder weighing 4 8 5 N rests against a frictionless wall. The ladder makes a 5 3 . 0 angle with the horizontal. ( a ) Find the horizontal and vertical forces the ground exerts on the base of the ladder when an 8 1 5 - N firefighter has climbed 4 . 0 4 m along the ladder from the bottom. ( b ) If the ladder is just on the

What is the direction of the current? Select the correct answer and explanation. The direction of the current is counterclockwise because the batteries in this circuit are oriented to "assist" each other.The direction of the current is clockwise because the batteries in this circuit are oriented to "oppose" each other and the 1 2 VV battery

Silver has a work function of 4 . 7 3 eV . ( a ) Find the cutoff wavelength and cutoff frequency for the photoelectric effect. wavelength nmfrequency Hz ( b ) What is the stopping potential if the incident light has a wavelength of 1 8 2 nm ? V

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