How much heat is required to convert 0.3 kilogram of ice at 0°c to water at the same temperature?
a. 100,375 j
b. 450,759 j
c. 334,584 j
d. 167,292 j

Aregular polygon has angkes of size 150° each.how many side has the polygon

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.