HELP A 147-Newton horizontal force is exerted upon a 3.1-kg box to move
it across a level surface at a constant velocity of 1.4 m/s. The force of
friction encountered by the box is Newton.
O 47
O 105
O 4.84
O 147

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system