For two identical satellites in circular motion around the earth, which statement is true?
a. the one in the higher orbit has more kinetic energy
b. the one in the lower orbit has more total energy
c. the one in the lower orbit has less total energy
d. both have the same total energy

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).