1. what is heat? a) a measurement of how fast the molecules of an object are moving. b) the energy contained within an object because of its moving molecules. c) the amount of heat needed to raise the temperature of a substance 1°c 2. what is temperature? a) a measurement of how fast the molecules of an object are moving. b) the energy in an object due to the movement of its molecules c) the amount of heat needed to raise the temperature of a substance 1°c

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?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?