In what two ways can the impulse exerted on something be increased? Increase the average force or increase the contact time
Increase the initial force or increase the mass of the object
Increase the velocity or change the diretion
Increase the acceleration and the contact time

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?