In a childhood game called “crack the whip”, children hold hands, form a line, and pivot around one person at the center. who is most likely to let go first and why? refer to the centripetal acceleration and the centripetal force formulas to justify your comments where possible.

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c