At a given instant, two blocks connected by a spring (which has negligible mass) are sliding down a long ramp. at the moment we inspect the system, the spring is compressed and exerting forces on both blocks, but block 1, the block in front, is slowing down while block 2 behind it is speeding up. 1 2 ~v2 ~v1 how do the forces exerted by the spring on blocks 1 and 2 compare?

Heat from the sun reaches earth to a. radiation b. convection c. conduction

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?