Why might the term red hot be misleading? (relating to stars)

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Which of the following are appropriate acceleration units?