Reviewing mass
which statements accurately describe mass? check all that apply.
mass is a chemical property of an object.
mass is measured using a balance.
the mass of an object remains constant.
mass is the same as weight.
kilograms are units of mass.

Because shotguns bullets ricochet

The answer is  a.first and third quarters 

If your workout exceeds an hour you should substitute "a sports drink" for water.hope my answer has you : )

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: where m is the mass of the arrow and v its velocity.  all the other options, instead, do not increase the kinetic energy of the system: -  pulling farther back on the string : this will just increase the elastic potential energy of the system-  holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)-  decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)