The speed of a hockey puck, sliding across a level ice surface, decreases at the rate of 2.6 m/s?. The coefficient of kinetic friction between the puck and ice is:

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Can someone me with these questions plz.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true