Which travels at the greatest speed?
a. sound through air
b. light through glass
c. sound through water
d. light through a vaccum.
i think it's between a. and d. but i'm not sure. me

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

Which of the following correctly describes the early view of catastrophism?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.