An elastic rope is extended by 1.0cm when a load of 10kg hangs on it. what additional load will be required to cause a further extension of 2.0cm?

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?

Of is j/kg·k. if a 2.6 kg of isk to k, is ?

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.