In your own words, explain how the red shift in the spectrum of objects in space provide evidence for the big bang theory.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?