an astronaut in a orbiting spacecraft is strapped to a spring with a constant 400N/m. if the oscillation period is 2.5 s what is the astronauts mass?

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

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?

Explain what will happen if decomposers were apsent from a forest ecoysystem.