Find the minimum speed for the roller coaster riding along the inner side of a loop with a radius r and an acceleration of 1.5 times earth's little g for each of the following for each of the following rollercoaster constructions: a. the radius of curvature at the top of the loop is 15 m.
b. the radius of curvature at the top of the loop is 25 m.

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

Which of the following is an example of motion in two dimensions?

In the first law of thermodynamics, triangle e=q-w, what does q stand for