Calculate the mass of the object. use . matthew rolls a bowling ball with a speed of 2 meters/second. the ball hits the pins with 1.8 joules of kinetic energy. the mass of the bowling ball is kilograms.

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.

The air that we breath is made mostly of which gaseous molecule

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?