having trouble with conversion problems for statics..?

Question

1. A structural steel has an allowable stree of 21, 600 psi. Express this in pascals.

2. An electric motor shaft roatoes at 1750 rpm. Express the rotational speed in radians per second.

3. An allowable deformation of a certain beam is .080 in. Express the deformation in millimeters.

4. Compute the area of a rod having a diameter of .505 in. in square inches. Theh convert the result to square millimeters.

We were given 10 questionns and those 4 i'm having trouble with figuring out how to solve.. please helpp

Answer 1

1 1 psi = 6.895 kPa (6,895 Pa)
2 1 rotation = 360 degrees = 2pi radians
3, 4 1 in = 25.4 mm

Just remember to square the 25.4 in question 4.