a box of mass 3kg is lifted 1.5 m onto a shelf. calculate the change in its gravitational potential energy. the gravitational field strength is 10 N/kg

Which property of fossils allow scientists to determine the relative rock ages..

The total amount of energy contained in an object

Asynthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. how is the standard deviation of the sample mean changed when the sample size is increased from n equals 8 to n equals 47