Akitten sits in a lightweight basket near the edge of a table. a person accidentally knocks the basket off the table. as the kitten and basket fall, the kitten rolls, turns, kicks, and catches the basket in its claws. the basket lands on the floor with the kitten safely inside. if air resistance is negligible, what is the acceleration of the kitten-basket system while the kitten and basket are in midair? a the acceleration is directed downward with magnitude less than g because the basket is light. b the acceleration is directed downward with magnitude equal to g because the system is a projectile. c the acceleration fluctuates because of the rolling, turning, and kicking motion of the kitten. d the acceleration cannot be determined without knowing how hard the basket is pushed.

In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. thus, the charge can be considered to be distributed uniformly throughout the cloud. for the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. the point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. this breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another nearby cloud. the ionized air will then emit light due to the recombination of the electrons and atoms to form excited molecules that radiate light. in addition, the large current will heat up the air, resulting in its rapid expansion. these two phenomena account for the appearance of lightning and the sound of thunder. take the breakdown electric field of air to be eb=3.00ă—106n/c. part a estimate the total charge q on the cloud when the breakdown of the surrounding air is reached. express your answer numerically, to three significant figures, using ďµ0=8.85ă—10â’12c2/(nâ‹…m2) .

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell