Match the machines with how they make work easier. 1. Inclined plane
2. Screw
3. Wedge
4. Lever
5. Wheel & axel
6. Pulley

Possible answers:
A. Multiply by distance
B. Multiply the distance and change direction
C. Multiply the force
D. Multiply force and distance and change direction

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

Ascientific blank must be testable and capable of being proven false?