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A boat is traveling upstream in the positive direction of the x axis at 12 km/h with respect to the water of a river. The water is flowing at 5 km/h with respect to the floor
(a) Find the velocity of the boat with respect to the floor?
km/h
(b) A kid on the boat walks from front to rear at 8 km/h with respect to the boat. Find the kid's velocity with respect to the floor?
A step-up transformer is designed to have an output voltage of 2200V (rms) when the primary is connected across a 208 V (rms) source. If there are 76 turns on the primary winding, how many turns are necessary on the secondary?
The equation of a transverse wave traveling along a very long string is y = 5.0 sin (0.055 ?x + 6.0 ?t), compute the amplitude of propagation of the wave
If the car had been going 10m/s but had stopped in the same d = 167m distance, what would its acceleration have been.
A bungee jumper undergoes simple harmonic motion with amplitude 6.4 m and frequency 0.145 Hz. Determine the bungee jumper's velocity at 0.25 seconds
Consider the collision between two hockey pucks in the figure below. They do not stick together. Their speeds before the collision are v1i = 30 m/s and v2i = 11 m/s. What is the final velocity of the other puck
neutral particle a neutral particle is at rest in a uniform magnetic field b. at time t 0 it decays into two charged
Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB for a period of 9.00 hours, How much sound energy is incident on the eardrum during this time
A 1.98 10-9 C charge has coordinates x = 0, y = ?2.00; a 2.73 10-9 C charge has coordinates x = 3.00, y = 0; and a -4.95 10-9 C charge has coordinates x = 3.00, y = 4.00, where all distances are in cm.
An automobile engine slows down from 3000 rpm to 900 rpm in 4.5 s. find the total number of revolutions the engine makes in this time
What is the magnitude of the electric field 19.7 cm directly above an isolated 3.25×10^?5 C charge? What is the direction of the electric field? Downward or upward?
A magnifier has a magnification of 8 times. How far from the lens should an object be placed so that its (virtual) image is at the near-point distance of 25 {rm cm}.
After falling from rest from a height of 29 m, a 0.49-kg ball rebounds upward, reaching a height of 19 m. find average force was exerted on the ball
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