Which characteristic is used to measure the amount of light radiated by a star?

size

color

luminosity

temperature

An underwater air bubble has an excess inside pressure of 13 pa. what is the excess pressure inside an air bubble with twice the radius?

A weightlifter lifts a 1000 newton barbell above his head from the floor to a height of 2.5 meters. he holds the barbell there for 5 seconds. how much work does he do during the 5 second interval?

Which of the following is known as the use of a wave?

When the rooster crows, the sun rises. therefore, the rooster causes the sun to rise?

5. How are humans affecting global climate change?

A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as well. Which of the following formulas can be used to calculate the volume of the ball?

Is there such a thing as real time weather radar? why not?

Luke and Carrie are driving down a straight section of the interstate at 70 mph in Luke's new convertible. Carrie is drinking a soda in the passenger seat.

A force produces power p by doing work w in a time t. what power will be produced by a force that does six times as much work in half as much time?

A batter hits a baseball with a bat. The bat exerts a force on the ball. Does the ball exert a force on the bat?