How did einstein reconcile the ideas that motion is relative and the speed of light is a constant?

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Why do electron microscopes have higher resolving power than light microscopes?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse