Which of the following describes mass?
a. the number of particles or amount of matter
b. how tightly matter is packed into volume
c. the amount of space that matter occupies
d. how fast the particles of matter are moving

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Avalue that describes how heavy an object is and is related to the force of gravity is

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