A mass is vibrating at the end of a spring of force constant 375 N/m. The figure below (Figure 1) shows a graph of its position x as a function of time t. .At what times is the mass not moving? Express your answers in seconds, separated by commas, to two significant figures. How much energy did this system originally contain? Express your answer in joules to two significant figures. How much energy did the system lose between t1 = 1.0 s and t2 = 2.0 s? Express your answer in joules to two significant figures.

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.)

What kind of simple machine is a catapult?

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d