What is my sisters

How much work does a 725-kg hot air balloon do as it rises from a height of 1,025 m to a height of 1,275 m?

A car in front of the school goes from rest to 5.6 m/s in 3 seconds. What is its acceleration?

A 4 kg block is pulled with 5.6 N of force to the right. The block experiences 1.1 N of friction. What is the acceleration of the block?

Amy walks 32 m right and then 12 m left. She turns and walks another 28 m right and then turns and walks 7 m left. What is Amy's displacement?

The top of the cylinder head is sealed by the A. valve cover. B. oil retainer. C. oil pan. D. front cover.

Electrons flowing into a resistor make that end A. positive with respect to the other end B. negative with respect to the other end C. higher in resistance D. extremely warm

The force of air resistance acts to oppose the motion of an object moving through the air. A ball is thrown upward and eventually returns to the ground.

The temperature of a substance during an experiment can be modeled by the function f (x) = - 7.5cos (πx30) + 31.4, where f (x) is the temperature °c and x is the number of minutes into the experiment.

Which of the following are good conductors? A. A rubber tire B. A penny C. A newspaper D. An aluminum soda can E. Water F. Air

Ideentify the two atmospheric layers that contain air as warm as 25 degrees Celsius.