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At 25 meter from a sound source, the intensity level is 55 dB. Find what is the level at the distances of
a) 50 meter,
b) 250 meter?
An interplanetary spaceship passes through the point in space where the gravitational forces from the moon and the earth on the ship exactly cancel. How far from the center of the earth is it
The pendulum in a grandfather clock is made of brass and keeps perfect time at 15. How much time is gained or lost in a year if the clock is kept at 29
A truck is traveling at 12.6 m/s down a hill when the brakes on all four wheels lock. Find how far does the truck skid before coming to stop
A cord is wrapped around the rim of a solid uniform wheel 0.300 {\rm m} in radius and of mass 9.00 {\rm kg}. A stable horizontal pull of 42.0 {\rm N} to the right is exerted on the cord, pulling it off tangentially from the wheel.
A 25.0g sample of copper at 363 K is placed in 100g of water at 293 K. Calculate final temperature of the water
a single infinite sheet of charge is aligned on the y axis. a point charge of -6.4 micro-coulombs is placed to the
At what temperature is the diameter of the hole equal.
A boxer receives a horizontal blow to the head that topples him over. The force, of magnitude 1.06 x 10^3 N, is applied for 1.1 x 10^-2 s at a point 1.82 m above the floor. Find the boxer's final angular velocity
A light wave was reflected off of a mirror at an angle of37°. What was the incident angle
A hydrogen atom initially in its ground state (n = 1)absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon
A 5 kg mass attached to a horizontal spring is pulled from its equilibrium position by 2 m and let go. what is the maximum velocity of the mass
two blocks m1 2.99 kg and m2 6.13 kg are in contact on a frictionless horizontal tabletop. an external force is
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