Every second, the sun converts 4 million tons of matter to energy. how long will it take the sun to reduce its mass by 1% (the mass of the sun is 2 × 1030kg)? compare your answer with our best estimate of the age of the sun.

An object is moving east, and it’s velocity changes from 65m/s to 25m/s in 10 seconds. which describes the acceleration?

Which of the following are guidelines to follow for obtaining accurate observations

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc