The impact time for a particular collision is 3.0 x 10^-3 seconds and the impulse in the collision is 0.30 newton seconds. what is the force of the collision? a.) 25 newton’s b.) 50 newton’s c.) 1.0 x 10^2 newton’s

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?