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One end of a string, 15 mlong, is moved up and down with a simple harmonic motion at a frequency of 30 Hz. The waves reach the other end of thestring in 0.12 s. What is the wavelength of the waves on the string?
two balls of the same mass areaccelerated by the different net forces such that one ball gains avelocity twice that of
V_A is the electric potential at point a. V_A ( V_B
A 40.0 kg box initially at rest is pushed 4.05 m along a rough, horizontal floor with a constant applied horizontal force of 145 N. find the work done by the applied force
Original problem: a person walks at constant speedv1 along a straight line from A to B and then back alongthe line from B to A at constant speed v2, What is theaverage speed over the entire trip
a 2190 kg car moving east at 10.4 ms collides with a 3170 kg car moving east. the cars stick together and move east as
The electricity received at an electric substation has a potential difference of 2.80 10^5V. If the requires output is 440V, what must be the ratio of the turns of the step-down transformation.
A person looks horizontally at the edge of a swimming pool. If its length is 5.00m, and the pool is filled to the surface, to what depth (in m) could observer see? For water is 1.33).
A 0.70-kg disk with a rotational inertia given by MR2/2 is free torotate on a fixed horizontal axis suspended from the ceiling. A string is wrapped around thedisk and a 2.0-kg mass hangs from the free end. I
at a hydroelectric power plant the water pressure head is at a height of 300 m and the water flow available is 100 m3
a rock band playing an outdoor concert produces sound at120 rm db 5.0 rm m away from their single working loudspeaker.
A spaceship needs to change its course by angle ?. The ship's engines can exert a force F in any direction. For how long do the engines need to remain on
The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01e3m/s for a 0.15m long carbon rod
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