A 500 g box is pulled by a force over a horizontal surface. The coemelent of kinetie trietien between the surface and the box is 0.31; pulling force has a magnitude of 채 N and is parallel to the surface. What is the magnitude of the friction foree acting on the boxt
a. 0.16 N
b. 1,5 N
c. 1.7 N
d. 4.6N
e. N 67.
What is the acceleration of the box?
a. 0.16 m/s
b. 1.5 m/s
c. 1.7 m/s
d. 4.6 m/gt
e. 3.8 m/g

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

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?

Matter that emits no light at any wavelength is called