Please help!! Two hockey pucks each with a mass of .2 KG slide across the ice and collide. Before the collision one puck is moving 16 m/s to the east and puck two is moving 11 m/s to the west. After the collision puck one is moving at 11 m/s to the west. What is the velocity of puck 2.

Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.