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Take a hollow plastic ball (dia 3 cm to 5 cm) using a needle. Pass a thread of about 105 cm along a diameter of the ball. Tie a knot at one end. Hang the ball from a rigid support so that the ball is free to oscillate. Make a small hole (5 mm dia) in the ball near the top. Fill it with sand and find its time period of oscillation. Empty the ball and fill it with steel balls/iron filings and repeat the experiment. Similarly carry out the experiment with common salt. Compare the time periods obtained in the above three cases. What do you find? Explain your finding.
A 20 kg satellite has a circular orbit with a period of 2.8 h and a radius of 7.9 106 m around a planet of unknown mass. what is the radius of the planet
q1. a skier starts from rest at the top of a hill that is inclined at 12.0deg with the horizontal. the hillside is
A stone is dropped into a river from a bridge 43.90 m above the water. Another stone is thrown vertically down 1.00 after the first is dropped. The stones strike the water at the same time.
Obtain what energy is dissipated by a lightning bolt having a 18,000 Amp current, a voltage of 106 MV, and a time duration of 1.00 milliseconds
A 100 W beam of light is shone onto a black body of mass 2 x 10^-3 kilogram for a duration of 10^4 s. Obtain the total energy and momentum absorbed by the black body from the light beam
A hollow sphere of radius 0.170 meter, with rotational inertia I = 0.0150 kg•m2 about a line through its center of mass, rolls without slipping up a surface inclined at 38.0 degree to the horizontal. Obtain how much of this initial kinetic energy is ..
Two identical objects each hold a net charge of q = 8e. What is the mass of each object
A mass m = 6.9 kg hangs on the end of a massless rope L = 2.09 m long. Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. How fast is the mass moving at..
Standard 14-gauge household copper wire carries 0.500 A of current with a current density of 2.40×105 A/m2. What is the strength of the electric field in the wire that is driving this current
A coil of wire with 217 circular turns of radius 3.20cm is in a uniform magnetic field along the axis of the coil. The coil has R = 41.5?, calculate the average emf induced in the coil
the cars a and b are moving due east and due north at 60 and 80 km p.h. respectively .at noon a is west of b at a
A gas at a temperature of 385 K, a pressure of 72 kPa and occupying a volume of 0.36 m3, is compressed to a volume of 0.10 m3. The temperature of the gas rises by 34~K. What is the pressure of the compressed gas? Give your answer in pascals
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