A0.66-kg block is hung from and stretches a spring that is attached to the ceiling. a second block is attached to the first one, and the amount that the spring stretches from its unstrained length increases by a factor of 7. what is the mass of the second block?

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

The slope of a velocity time graph over any interval of time gives the during that interval

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system