If a 5-kilogram mass is raised vertically 2 meters from the surface of the Earth, its gain in potential energy is approximately {Hint: PE = mgh where g = 9.8 m/s2}

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above