Question 7 of 10 Why do the north and south poles of these magnets attract each other?

SNSN

A. They have two different magnetic fields.

B. They have opposite electrical charges.

C. The magnetic fields of the two magnets repel each other.

D. The opposite magnetic poles of the two magnets face

each other.

Aball is thrown straight up into the air with a speed of 21 m/s. if the ball has a mass of 0.1 kg, how high does the ball go? acceleration due to gravity is g = 9.8 m/s^2. a. 22.5 m b. 20.0 m c. 25.0 m d. 17.5 m

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

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.