Arectangular block of copper metal has a mass of 1896g. the dimensions of the block is 213cm3 . what is the density of copper?

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

How many times did thomas edison mess up the light bulb

Positrons are spontaneously emitted from the nuclei of