Starting from rest, a 10.0kg suitcase slides down a frictionless ramp that is 1.5m high. The suitcase then slides an additional 5.00m along the floor before coming to a stop. Find: 1.Kinetic energy of the suitcase at the bottom of the ramp. 2.The speed of the suitcase at the bottom of the ramp, 3.The work done by the force of friction in bringing the suitcase to a stop.4.The force of friction. 5.The coefficient of friction.

In the derivation of rrkm theory, a factor of 1/2 is introduced when equalizing the rates of formation and decomposition of activated complex as keal-hr) = ko this is clearly against the assumption of transition state theory that states all the activated complex in the transition state iss going to the product. find the reason why this factor is introduced here.

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?

Could we see a galaxy that is 20 billion light-years away?