A 20 kg truck drives in a circle of radius 4 m at 10m/s. What causes the circular motion?
A. Normal Force
B. Friction
C. Tension
D. Gravity

What are the theoretical properties of a gas at a temperature of 0 kelvin?

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.