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the diode laser keychain you use to entertain your cat has a wavelength of 646 if the laser emits 490times1017 photons
light of wavelength 56 ionizes a hydrogen atom that was originally in its ground state what is the kinetic energy of
a runner rounds a circular curve of radius 240 m at a constant speed of 525 ms what is the magnitude of the runners
long-playing vinyl records still used by club djs are 12 inches in diameter and are played at 33 13 revolutions per
light from the sun arrives at the earth an average of 150times1011 m away at the rate of 140times103 wm2 for an area
a 150 g baseball is pitched at 50 ms and is hit straight back at the pitcher at a speed of 60 ms what is the magnitude
an fm radio station of frequency 967 mhz puts out a signal of 29900 w how many photons per unit time are
a bomb at rest explodes breaking into three pieces two of the pieces have equal mass and fly off at 60deg to one
a thin soap film n 135 is suspended in air the spectrum of light reflected from the film is missing two visible
cart a with a mass of 2 kg travels on a horizontal air-track at 3 ms and hits cart b which has a mass of 4 kg and is
a ball of circumference 736 cm and mass 600 g is forced to the bottom of a swimming pool and then released after
suppose you have a spherical balloon filled with air at room temperature and 10 atm pressure its radius is 18cm you
a transverse periodic wave is represented by the equation zyt 150cm sin1250 rads t 100m -1 y what is the velocity of
in an adventure movie a 600-kg stunt woman falls 800 m and lands in a huge air bag her speed just before she hit the
a bullet is fired into a large stationary absorber and comes to rest temperature measurements of the absorber show that
a diving bell with interior air pressure equal to atmospheric pressure is submerged in lake michigan at a depth of 1421
a laser beam aimed from the earth is swept across the face of the moon a if the beam is rotated at an angular velocity
a waterproof rubber ball with bulk modulus 2725middot107 nm2 is submerged underwater to a depth of 9869 m what is the
a real object is 421 cm from a negative lens that has a focal length of 256 cm the object is 245 mm high the height and
a collie drags its bed box across a floor by applying a horizontal force of 31 n the kinetic frictional force acting on
a 49 kg bear slides from rest 10 m down a lodgepole pine tree moving with a speed of 38 ms just before hitting the
a boy of mass m runs with a speed v and jumps onto a sled on an icy pond the sled was at rest before the boy jumped
diffraction also occurs with sound waves consider 1400-hz sound waves diffracted by a door that is 93 cm wide what is
in europe a large circular walking track with a diameter of 0900 km is marked in angular distances in radians an
a pendulum sweeps out an angle of 125deg during its motion how far does the pendulum bob the ball at the end of the