Achange occurs in an environment that lasts for several thousand years and causes changes to the gene
several species. what can be known about this change?
it is short-term
it is long-term
it involve an el niño storm.
it involves a la niña storm.

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?