After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 53.0 cm . the explorer finds that the pendulum completes 99.0 full swing cycles in a time of 128 s . what is the magnitude of the gravitational acceleration on this planet? express your answer in meters per second per second.

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

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?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?