Explain the difference between variables and controls in a scientific experiment. what is the purpose of a control?

To squeeze a gas into a smaller place

The physical model of the sun’s interior has been confirmed by observations of

Ocean depth is usually measured in fathoms, but that is not a relatable unit and is often converted. Echosounding determined the depth of an area off the coast of Bermuda to be 780 fathoms. How many meters is this? (1 fathom=1.8 meters)

a train moves east with a speed of 45 m/s a man on the train walks west with a speed of. 4 m/s relative to the train how long does it take the man to move 10m relative to the train?

What do scientist use to determine the temperature of a star

How are the relationships of elements in a group different from the relationships of elements in a period?

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?

What happens to the speed of the particles if the temperature is increased

A 65-year-old male enters the hospital with high blood pressure, damaged lungs, low blood-oxygen concentration, and throat cancer. What are all of these symptoms associated with?

At a certain factory, 340 kg crates are dropped vertically from a packing machine onto a conveyor belt moving at 1.00 m/s. (A motor maintains the belt's constant speed.) The coefficient of kinetic friction between belt and crate is 0.400.