Need asap which is a physical change? a. burning wood b. rusting metal c. cooking an egg d. freezing water

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

What happens when a rubber rod is rubbed with a piece of fur?