Provide the luminosity of the sun
How many protons must combine to make one He nuclei every second to provide the luminosity of the sun? Estimate how long the Sun could go on at this rate before all its protons were used up.
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A propeller blade spinning at 4500 rpm has blades that are 3.00 feet long. How fast (in ft/s) are the tips of the blades moving through the air?
If Bob pulls the heavy crate SOUTH with a force of 5.00 N and Grace pulls the heavy crate WEST with a force of 12.0 N, what is the magnitude and direction of the resulting Force?
An object is dropped from rest from a height of 5.4 x 10^6 m above the surface of the earth. If there is no air resistence, what is its speed when it strikes the earth? The acceleration of gravity is 9.81 m/s^2 and the radius of the Earth is 6.37
(a) prove that the total momentum of the system is zero (b) prove that the total angular momentum of the system (Lem) is independent of the choice of origin
A sample of an ideal gas at 15.0 atm and 1.0L is allowed to expand a constant external pressure of 2.00 atm at a constant temperature. Calculate the work in units of kJ for the gas expansion.
What is B(A+C)/A in cartesian notation? Express B, A and ( A+ C) in polar notation and repeat the above question.
The elevator accelerates upward with constant acceleration for a distance of 3.6 and then starts to slow down. What is the maximum speed of the elevator?
Copper crystallizes in a face-centered cubic lattice. If the edge of the unit cell is 351 pm, what is the radius of the copper atom?
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