Jessica took a mylar balloon outside on a very hot day. as she waited for the bus the balloon began to get bigger. what is the best explanation of this?
a) as the particles became warmer, they lost energy and moved more, resulting in less pressure on the balloon.
b) as the particles became warmer, they gained energy and moved more, resulting in less pressure on the balloon.
c) as the particles became warmer, they lost energy and moved more, resulting in more pressure on the balloon.
eliminate
d) as the particles became warmer, they gained energy and moved more, resulting in more pressure on the balloon.

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?