Stopwatch, originally set at 00:00 When a car was first seen, the stop-start button was prewed. When the car
observer, the stopwatch showed 01:06.
stop-start butto
How long did the car take to reach the observer?
B 6 seconds
min
01.06
C 66 seconds
D
A 1.06 seconds

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?