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Q. A diving board oscillates with simple harmonic motion of frequency 3.23 cycles per second. What is the maximum amplitude with which the end of the board can vibrate in order that a pebble placed there not lose contact with the board during the oscillation?
Q. The speed of light is 1.35 times larger in material A than it is in material B. Determine the ratio nA/nB of the refractive indices of these materials.
What mass (in grams) of steam at 100°C must be mixed with 124 g of ice at its melting point, in a thermally insulated container, to generate liquid water at 37.0°C.
Old naval ships fired 10kg cannon balls from a 250 kg cannon. It was very important to stop the recoil of the cannon, as otherwise the heavy cannon would go careening across the deck of the ship.
A hiker walks 3.50 km at an angle of 45.0 degrees north of west. After that the hiker walks 1.5 km south. What is the magnitude and direction of hiker's totally displacement.
Find out altitude of the airplane
A rattlesnake can strike with the acceleration equivalent to an increase in speed from 0 to 60 mi/h in 1/2 s. If the rattlesnake's head weighs 0.33 lb, what average power does the rattlesnake generate throughout its strike.
What is the smallest distance required to stop the plane
A cable is used to raise a 29kg urn from an underwater archeological site. There is a 21 N drag force from the water as the urn is raised at a constant speed.
A cube of ice is taken from the freezer at -8.4^circ C and positioned in a 114 g aluminium calorimeter filled with 322g of water at room temperature of 20.0 C. The final situation is observed to be all water at 15.0C.
What minimum force is necessary to start the block moving up the wall? (Hint: The static frictional force is now directed down the wall.)
In uniform circular motion, a particle undergoes motion in a circular path with a constant speed. Which of the following statement is false and why?
The valuable coefficient of kinetic friction
A 120 g trick baseball is thrown at 51 km/h. It explodes in flight into two pieces, with a 50 g piece regular straight ahead at 86 km/h. How much energy do the pieces gain in the explosion.
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