Due in 12 min. STUCK. Help me please?

A: Carl Sagan wrote extensively on people’s connections to the universe. What does Sagan mean when he says that, “we are star stuff?”

B: Do you agree with Sagan’s assessment of people’s connection to the universe? Explain your answer based on what you know about the life and death of stars.

Amachinist needs to remove a tight fitting pin of material a from a hole in a block made of material b. the machinist heats both the pin and the block to the same high temperature and removes the pin easily. what statement relates the coefficient of thermal expansion of material a to that of material b? a) the situation is not possible, heating block b will shrink the hole in the material as the material expands with increasing temperatureb) material b has the same coefficient of expansion as does material ac) material b has a negative coefficient of expansion and a has a positive coefficient of expansiond) material a has a greater coefficient of expansion than does material be) material b has a greate

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.