At what stage of stellar evolution does a star have a shell of burning material and a non fusing core? A. the giant stage

B. The dwarf stage

C. The protostar stage

D. the supernova stage

E. the main sequel stage

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

Determine the largest intensity w of the uniform loading that can be applied to the frame without causing either the average normal stress or the average shear stress at section b–b to exceed σ=19 mpa and τ=24 mpa, respectively.

What are the differences and relationships between speed, velocity, and acceleration