Exam 1: A: Foundations

A hockey puck slides off the edge of a table with an initial velocity of 28.0 m/s.and experiences no air resistance.The height of the tabletop above the ground is 2.00 m.What is the angle below the horizontal of the velocity of the puck just before it hits the ground?

On a frictionless horizontal table,two blocks (A of mass 2.00 kg and B of mass 3.00 kg)are pressed together against an ideal massless spring that stores 75.0 J of elastic potential energy.The blocks are not attached to the spring and are free to move free of it once they are released from rest.The maximum speed achieved by each block is closest to:

In the figure,the radius of curvature of the curved part of the lens is 35.0 cm,and the refractive index of the lens material is 1.620.What is the focal length of the lens?

An object is attached to a hanging unstretched ideal and massless spring and slowly lowered to its equilibrium position,a distance of 6.4 cm below the starting point.If instead of having been lowered slowly the object was dropped from rest,how far then would it then stretch the spring at maximum elongation?

A single slit,which is 0.050 mm wide,is illuminated by light of 550 nm wavelength. What is the angular separation between the first two minima on either side of the central maximum?

A wave pulse traveling to the right along a thin cord reaches a discontinuity where the rope becomes thicker and heavier.What is the orientation of the reflected and transmitted pulses?

White light is incident normally on a thin soap film having an index of refraction of 1.34.It reflects with an interference maximum at 684 nm and an interference minimum at 570 nm with no minima between those two values.The film has air on both sides of it.What is the thickness of the soap film?

An alpha particle is moving at a speed of 5.0 × 10⁵ m/s in a direction perpendicular to a uniform magnetic field of strength 0.040 T.The charge on an alpha particle is 3.2 × 10^-19 C and its mass is 6.6 × 10^-27 kg. (a)What is the radius of the path of the alpha particle? (b)How long does it take the alpha particle to make one complete revolution around its path?

How long will it take a 7.08 hp motor to lift a 250 kg beam directly upward at constant velocity from the ground to a height of 45.0 m? Assume frictional forces are negligible.(1 hp = 746 W)

A cup of water containing an ice cube at 0°C is filled to the brim.The tip of the ice cube sticks out of the surface.As the ice melts,you observe that

What is the limiting angle of resolution for the eye if the pupil diameter of the eye is 4.0 mm,the wavelength of the light is 600 nm,and index of refraction of the liquid in the eye is 1.34?

A sample of an ideal gas is slowly compressed to one-half its original volume with no change in pressure.If the original root-mean-square speed (thermal speed)of the gas molecules was V,the new speed is

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

An electromagnetic wave propagates along the +y direction as shown in the figure.If the electric field at the origin is along the +z direction,what is the direction of the magnetic field?

A wire carries a 4.0-A current along the +x-axis through a magnetic field = (5.0 + 7)0 )T) If the wire experiences a force of 30 N As a result,how long is the wire?

A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a sound with a frequency of 41.2 kHz.A car is approaching him at a speed of 33.0 m/s.The wave is reflected by the car and interferes with the emitted sound producing beats.What is the frequency of the beats? The speed of sound in air is 330 m/s.

The components of vector are B_x = -3.5 and B_y = -9.7,and the components of vector Are C_x = -6 and C_y = +8.1.What is the angle (less than 180 degrees)between vectors And ?

Four equal negative point charges are located at the corners of a square,their positions in the xy-plane being (1,1),(-1,1),(-1,-1),(1,-1).The electric field on the x-axis at (1,0)points in the same direction as

Light of wavelength 400 nm falls on a metal surface having a work function 1.70 eV.What is the maximum kinetic energy of the photoelectrons emitted from the metal? (c = 3.00 × 10⁸ m/s, H = 6.626 × 10^-34 J • s = 4.141 × 10^-15 ev • s,1 eV = 1.60 × 10^-19 J)

You are driving a late model convertible car at the 65 mph speed limit with its soft flexible roof closed up and the windows closed.You observe that the roof