Asuka travels at an average speed of 50 mph for 20 miles. Without stopping, Asuka then travels 70 miles in 1.75 hours.
Find her average speed for the entire journey to 2 dp.

Why do electron microscopes have higher resolving power than light microscopes?

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.