During an exothermic reaction, the energy given off comes from atoms being consumed mass being burned into energy the breaking and forming of bonds mass being created

A man has a weight of 100 Newtons. How much work is done if he climbs 4meters up a ladder?

Consider a loop of wire with a resistor. in the same plane, (with switch s closed) a long wire has a current i flowing from right to left.

A flexible helium-filled party balloon is released in the atmosphere. as it gains altitude, what happens to the density of the balloon? 1. decreases at first, then increases 2. decreases 3. unable to determine 4. increases at first, then decreases 5.

A passenger with a mass of 140,000 kg flies at a constant velocity of 220 m/s at an altitude of 11,000 meters. What net force acts on the plane?

F an electron fell to a lower orbit or energy level, energy would be A. created. B. emitted. C. absorbed. D. transferred.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called