About how fast are earth's tectonic plates moving, on average? a. 0.2-0.5 cm/yr b. 2-10 cm/yr c. 50-100 cm/yr d. 10-20 m/yr

Acylindrical specimen of a nickel alloy having an elastic modulus of 207 gpa (30 × 106psi) and an original diameter of 10.2 mm (0.40 in.) experiences only elastic deformation when a tensile load of 8900 n (2000 lbf) is applied. compute the maximum length of the specimen before deformation if the maximum allowable elongation is 0.25 mm (0.010 in.)

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished