I found a sample of earth material which contains a fossil. Can the sample be a mineral? Why or why not?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg