Explain the scientific theory of plate tectonics by describing how the movement of earths crystal plates cause both slow and rapid changes in earths surface, including volcanic eruptions, earthquakes, and mountain building

Which is a result of using a machine? The mechanical advantage makes the work output greater than the work input. The machine can put out force without having any force applied to it.

Which of the following statements is most accurate? A.) Warm air sinks B.) Warm air is denser than cold air C.) Warm air is less dense than cold air D.) Warm air exerts more pressure on the land than cold air

Shyam took out a bottle of cold water from the fridge, wiped it dry and left it on the table. A few minutes later he found water droplets on the outside of the bottle. Which process leads to the formation of the droplets?

A crane with output power of 200W will lift a 600N object a vertical distance of 4.0 meters in seconds

What is kinetic energy

The characteristics that follow are characteristics of two of Galileo's surviving double-convex lenses. The numbers given are magnitudes only; you must supply the correct signs. L 1: front radius 950 mm, rear radius 2700 mm, refractive index 1.

Which car has the most kinetic energy? A car of mass 1500 kg with speed 5 m/s or A car of mass 1300 kg with speed 3 m/s or a car of mass 1200 kg with speed 2 m/s or a car mass 1400 kg with speed 4 m/s

A 500 kg table with 4 legs rests on solid flat ground. I place 3 books on the center of the table with masses of 10 kg, 20 kg and 30 kg respectively. What is the normal force between the ground and one leg of the table?

Fluorine-21 has a half-life of approximately 5 seconds. What percentage of the original nuclei would remain after 20 seconds

Which of these is an example of a totalitarian regime A.) Canada under prime minister Trudeau's rule B.) the Soviet Union under Josef lo