Which of the following would be a good question that could be scientifically investigated?

a. what is the correct way to pursue happiness in life?
b. can play the piano at a shower tempo improve the sound quality?
c. what is the best advice a parent can give a child?
d. does lack of sunlight affect plant growth?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?