A train is traveling at 200 miles per hour for 15 miles. He applies his brakes, decelerating at 8. 5 miles per hour 2 to avoid hitting a car he sees stuck at the
railway crossing. What is the train’s final velocity?

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Determine the maximum r-value of the polar equation r =3+3 cos 0