Which of these is not true about weight: a) it is a measurement of how heavy an object is. b) it is always the same as mass, regardless of gravity. c) it is affected by an object's mass and the force of gravity. d) it is commonly measured in units such as grams, kilograms, ounces, and pounds.

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative