A 2.0 N weight trolley moves in the horizontal part of a chute without friction at a speed of 3.0 m / s. Classify the following statements as vendors or false, correcting these: a) The cart reaches a height h = 45 cm on the way up.

b) The kinetic energy variation of the cart, until it stops, is 0.90J.

c) The variation in the gravitational potential energy of the Cart + Earth system, until the cart stops, is 0.90 J.

d) The weight of the cart performs a work of 0.90 J from A to C.

A5 nc point charge is at the origin and a second 3 nc point charge is on the x-axis at x = 0.8 m. find the magnitude and direction of the electric field on the x-axs at x = 0.2 m. you may express the direction by letting positive field mean the positive x direction

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Which best describes what forms in nuclear fission? a. two smaller, more stable nucleib. two larger, less stable nucleic. one smaller, less stable nucleusd. one larger, more stable nucleus