The earth has a mass 5.89 x 1024 kg and the moon has a mass 7.36 x 1022 kg. If the distance between the center of the earth and the center of the moon is 3.84 x 105 km, how far from the center of the earth is the center of mass of the earth-moon system?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

If a stone with an original velocity of 0 is falling from a ledgeand takes 8 seconds to hoybthe ground whays the final velocity of the stone