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A vertical spring with a spring constant of470N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by2.8cm in bringing the block to a momentary halt. Assuming air resistance is negligible, from what height (in cm) above the compressed spring was the block dropped?
Light with a frequency of 2 X 10^15 Hz shines on a copper surface (=4.70 eV). What is the maximum kinetic energy of the photoelectrons
A straight rod consists of a 2cm long piece of aluminum attached to a 3cm long piece of steel. calculate the change in length of the aluminum rod
The electric field of a plane electromagnetic wave is given by: Ex = 0, Ey = 0, Ez = 2.0 cos [0.6? x 1015 (t – y/c)], with all quantities in SI units.
To test the working of a refrigerator you put a container having two liters of water (=2kg) at 50C in its freezer. How much heat has the refrigerator extracted from the water
Suppose the pilot, starting again from rest, opens the throttle partway. Find the net force acting on the boat
A charge particle of mass .0020kg is subjected to a 6 T magnetic field which is acts as a right angle to its motion. if the particle moves in a circle of radius .20m at a velocity of 5.0 m/s. what is the magntiude of the charge on the particle.
You stand on the shore of a small river that measure 10 meters across. You take your cat and throw it into the middle of the stream. How long did it take the cat to reach you
An electric resistor is energized until the temperature of the H20 reaches 150 C. Determine the magnitude of the electric work done on the H2O and the entropy change of the H2O.
Find the conversion factor between weights measured in Newtons to weights measured in pounds
For a 30 degree launch angle, the initial velocity(v0) is 3.12 m/s, the height at which the launcher is shot from has a height(h) of 1.17 m from the ground, Calculate angle the projectile makes with the horizontal just as projectile hits the ground
After the ambulance passes, the observed frequency of the siren is 493 Hz. Conclude the ambulance's speeds from these observations.
A 8.00 kg object is hung from the bottom end of a vertical spring fastened to an overhead beam. The object is set into vertical oscillations having a period of 2.90 s. Find the force constant of the spring.
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