A hockey puck with mass 0.21 kg slides across the ice. A hockey player uses her stick to slow down the puck by applying a 4.6 N force over a distance of 0.50 m. What is the change in the energy of the puck?

what type of charge does it have? negative

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.