A physics teacher poses the following question to her class: "We all know that the Earth pulls on the moon, but does the moon pull on the Earth? If so, which exerts a greater force?" The following students offer their answers and justifications. If the Earth pulls on the moon, then the moon must Student 1 also pull on the Earth. The forces they exert on each other would have to be equal and opposite. If the Earth pulls on the moon, then the moon must also pull on the Earth. But the Earth is much larger Student 2 and heavier than the moon, so the Earth will exert a greater force. The Earth pulls on the moon due to gravity but the Student 3 moon doesn't have gravity so it can't pull back on the Earth. The Earth pulls on the moon but the moon is so far Student 4 away that it can't pull back on the Earth. Which student's answer is the most accurate?

Air is held within a frictionless piston-cylinder container, which is oriented vertically. the mass of the piston is 0.45 kg and the cross-sectional area is 0.0030 m2. initially (state 1) the pressure of the gas is sufficient to support the weight of the piston as well as the force exerted by the atmospheric pressure ( 101.32 kpa). the volume occupied by the air within the cylinder in state 1 is 1.00 liter. one end of a spring (with spring constant k = 1000 n/m) is attached to the top of the piston, while the other end of the spring is attached to a stage that can move vertically. initially the spring is undeflected and therefore exerts no force. then the stage is then moved quasistatically downward a distance of 10.0 cm, at which point the system reaches state 2. the piston-cylinder is not insulated; rather it remains in diathermal contact with the surroundings, which are at a constant temperature of 300 k. what is the change of pressure within the container?

Awalk up the phase change graph worksheet

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island