Find out the final velocity of the skateboard
A boy of mass 46.2 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.2 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find the final velocity of the skateboard.
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Upon quenching the steel from 950 degree Celsius to 50 degree Celsius what phases will be present what will be the composition?
Calculate the mass of the Sun noting that the period of the Earth's orbit around the Sun is 3.156 107 s and its distance from the Sun is 1.496 1011 m.
Four point charges are placed at the corners of a square of side 0.20 m. The top two charges are 16 µC and the bottom two are -16µC. Find the electric field at the center of the square.
Twenty dietary iron tablets with a total mass of 22.131 g were ground and mixed thoroughly. Then 2.998 g of the powder was dissolved in concentrated HNO3 and heated to convert all the iron to Fe3+.
Calculate the escape speed from the Earth for a 4800 kg spacecraft and determine the kinetic energy it must have at the Earth's surface to move infinitely far away from the Earth. What is its orbital speed?
A new cellular phone billing plan cost $15 per month plus $1 for each minute of use. If the number of minutes you use the phone in a month is a geometric random variable with expected value 1/p, what is the expected monthly cost of the phone?
A 2.50 kg mass is attached to a light cord that is wrapped around a pulley of radius 3.45 cm, which turns with negligible friction. The mass falls at a constant acceleration of 3.85 m/s2. Find the moment of inertia of the pulley.
The hydrogen gas formed in a chemical reaction is collected over water at 30 degrees celsius and a total pressure of 732 mmHg.
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