An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.992c. relative to a stationary reference frame fixed to the laboratory, the particle travels a distance of 2.56 × 10-3 m before disintegrating. what is (a) the proper distance and (b) the distance measured by a hypothetical person traveling with the particle? determine the particle's (c) proper lifetime and (d) its dilated lifetime

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?