Coefficient of linear expansion

The coefficient of linear expansion of aluminum is 0.000023/C. A circular hole in an aluminum plate is 2.725 cm in diameter at 0C. What is the diameter of the hole if the temperature of the plate is raised to 100C? A child wants to pump up a bicycle tire so that its pressure is 250 X 10 Pa above that of atmospheric pressure. ...continues

What force must be applied to a small cylinder piston with a diameter of 0.32 m to lift a car weighing 12,000N that is supported by the piston in a large cylinder that has a diameter of 1.4m?

What force must be applied to a small cylinder piston with a diameter of 0.32 m to lift a car weighing 12,000N that is supported by the piston in a large cylinder that has a diameter of 1.4m? Assume that there is a closed chamber in the common between the two pistons and that the chamber is filled with hydraulic oil.

Tension

A spherical shaped hollow steel shell with a radius of 2.5 m containing some instruments is lowerd by a cable into a lake the shell with its contents weighs 7.5*10^5N on the deck of the ship wich is being lowered. What is the tension in the cable when the sphere is completly immersed in the water?

Height

What is the height in cm of the colunm of mercury for a murcury barometer when the atospheric pressure at a certain locations is 1.00 atm? The density of mercury is 13.55g/cm^3

Which phase of matter has a fixed volume and takes the shape of its container?

Which phase of matter has a fixed volume and takes the shape of its container?

Angular acceleration.

The angular acceleration of 1200 rev/min^2 when expressed in radians/s^2 is what?

Rotational inertia

A solid cylinder of mass 8kg and diameter of 20 is rotated about an axis paralle to its central axis at a distance of 10 cm from the cylinders central axis. The rotational inertia about the parrale axis is what?

SI units

Is there an SI unit for strain?

Young's modulus

What is Young's modulus defined as?

Collisions

A 200 g ball hits a wall perdendicularly with a velocity of 20 m/s. If the collision last miliseconds, what is the average force exerted by the ball on the wall?