A 40g bullet, fired from a rifle, hits and embeds into the pendulum. The 5kg pendulum swings backwards (pivots) and reaches a height of 0.15m. What
was the initial velocity of the bullet before the collision with the pendulum?
please provide your work!!!

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

Which is the most accurate name for the ionic compound cas?

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?