Asatellite of mass m 400 kg is observed with the initial speed v 3 km/s at the initial altitude h 4000 km above the earth's surface. the satelite descends in a free fall and hits the ocean with the final speed w. which one of the followings statements is the correct form of the 프~ problem 6(3 point ed push of what energy conservation in this process? these equations m stands for the mass of the earth, and r for the radius of the earth. in (b) 2 m1 none of the above. (n)

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

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.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter