Weightlifers a and b each lift the same barrel from the floor to a certain height. weightlifter a accomplishes this feat in time t = 2.0 s, while weightlifter b does so in 1.4 s. let p be the the power generated by weightlifter a. what power was generated by weightlifter b?

1.4p

0.70p

p

2.8p

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

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation 2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!