A45kg ice skater stands at rest on the ice. a friend tosses the skater a 5kg ball. the skater and the ball then move backwards across the ice with a speed of 0.5 m/s. what was the speed of the ball at the moment just before the skater caught it?

Acar tire contains 0.0380 m^3 3 of air at a pressure of 2.20 ×10^{5} 5 n/m^2 2 (about 32 psi). how much more internal energy does this gas have than the same volume has at normal atmospheric pressure, 1.01x10^5 5 pa?

The dissociation energy of a molecule is the energy required tobreak apart the molecule into its separate atoms. the dissociationenergy for a particular molecule is 5.48 x 10-18 j.suppose that this energy is provided by a single photon. determinethe (a) wavelength and (b) frequency of the photon

Which is not true about oxygen-17 and oxygen-18?