If an object is an irregularly shaped solid and it is dropped into a graduated cylinder and it displaces 25 mL of water and has a mass of 50 grams what is the density of this irregular shaped object.

How does an observation about an object differ from an inference about that object

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.