2. A mixture of mercury and copper is an example of a) solid and solid
b) liquid and solid
c) solid and liquid
d) liquid and liquid​

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

How is the ideal mechanical advantage of a wheel and axle calculated?

What is the magnitude of the gravitational force acting on the earth due to the sun?