A friend says that astronauts in orbit are weightless because they are beyond the pull of earths gravity. Correct your friends ignorance.

Geocentric theory: a. was initially rejected b. was in contradiction to the ideas of Ptolemy c. stated that the sun revolved around the earth d. all of the above

If 1.00 km^3 of air has a mass of 1.2x10^9 kg what is the density of air in g/cm^3

Becky has a shower and uses 20,000g of water with a specific heat capacity of 4200J/KG. When the water is supplied with 336,000J of energy, it heats up to 50^c. What is the startig temperature of the water?

Which chemical is released by brain cells along an activated reward pathway?

Which is heavier 1kg of iron or 1 kg of feathers? Which occupies more volume 1kg of iron or 1kg of feathers? Which has a larger density, iron or feathers?

Soul that drains slowly and most likely has a high amount of what?

What sd can friction do to moving objects?

Why is specific heat different for different materials

What must happen for an ion To form

What type of material is inside the holes in an electrical outlet?