You swing a hammer a distance of 0.8 m with a force of 120 n for 0.5 s. what is your power?
a. 60 w
b. 75 w
c. 96 w
d. 192 w

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?

How many atoms of nitrogen are in the chemical formula ni(w on

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.