What does the shift in carbon isotope values in marine shells indicate about the driving force for the abrupt warming 55 mya? (a) a spike in carbon dioxide occurred at the time of the warming. (b) large quantities of methane were responsible. (c) solar variability increased during the period. (d) a and/or b may be correct. (e) none of the answers is correct.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit