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?

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2

Which of the following statement is false