for 20 POINTS) A student is trying to determine the muzzle velocity (initial) of a bullet that is too fast to measure directly. The student fires the 0.03kg bullet into a 6kg block of wood initially at rest. After the collision, the block, with the bullet embedded inside moves to the right with a speed of 1.29m/s right.
what is the momentum before the collision of both the bullet and the block?
what is the momentum after the collision of both the bullet and the block?
how fast was the bullet fired?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.