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One billiard ball is shot east at 2.15 m/s. A second, identical billiard ball is shot west at 1.42 m/s. The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90^\circ and sending it north at 1.74 m/s.What is the speed of the first ball after the collision? What is the direction of the first ball after the collision? Give the direction as an angle south of east.
A rock is thrown vertically upward from the edge of a cliff. The rock reaches a maximum height of 19.6 m above the top of the cliff before falling to the base of the cliff, How high is the cliff
An 8.00 m, 200 N uniform ladder rests against a smooth wall. how far up the ladder can a 800 n man climb before the ladderbegins to slip
A 1410-kg racecar is driving around a circular track of radius 161 m. What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
When a 47.0-V emf device is placed across two resistors in series, a current of 15.0 A is flowing in each of the resistors. find the magnitude of the larger of the two resistances
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.370mm wide. What is the width of the central bright fringe
A copper rod 81 cm long is used to poke a fire. The hot end of therod is maintained at 105° C and the cool end has a constanttemperature of 24° C. What is the temperature in degrees Celsius of the rod 23 cm from the cool end?
A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. what is the force on either side where the board is supported
consider two displacements one of magnitude 2.5 m and another of magnitude 4.1 m. what angle between the directions of
A transformer with a turns ratio (secondary/primary) of 1:14 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit.What is the voltage supplied to the recharger?
Unpolarized light with an average intensity of 845 W/m2 enters a polarizer with a vertical transmission axis. What is the orientation angle of the second polarizer relative to the first one
A spaceship of rest length 192 m races past a timing station at a speed of 0.780c. What is the length of the spaceship as measured by the timing station
Suppose that the sound level of a conversation is initially at an angry 70 dB and then drops to a soothing 50 dB. determine the final sound wave amplitudes
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