Why conservation of energy supplies in cooler climates is more important than in warmer parts of the world

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue