At the gym, a woman lifts 40 kilograms of weights on the leg press machine. it takes her 0.5 seconds to raise the weights a vertical distance of 0.4 meters. how much power does the woman generate when lifting the weights? a) 180 watts b) 200 watts c) 320 watts d) 500 watts

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Aphysical change is a change in the size, shape,, or stafe of matter true or false