Which astronomer supported the belief that earth was at the center fo the universe?

a. Kepler

b. Ptolemy

c. Brahe

d. Hubble

A human eye is an example of a simple machine found in the human body. True or false

True or false: Decreased output from the vasomotor center allows arterioles and veins to constrict.

It takes 40 j to push a large crate 4 m across a floor the force exerted on the crate i

Why is a football firm when it is inflated to its proper pressure

Research indicates many adults experience emotional turmoil during their 40s. T or F

A boulder with a mass of 2,500 kg rests on a ledge 200m above the ground. What is the boulder's GPE

When and if Galileo dropped two balls of the same size but different masses from the top of the Leaning Tower of Pisa, air resistance was not really negligible. Which ball actually struck the ground first?

Which activity is an example of a chemical change? a. sugar dissolving in water b. water evaporating into water wapor c. lighting a match d. freezing water

Microwaves are electromagnetic waves used in broadcasting and telecommunications. when do these waves increase in frequency?

In which of the following situations is the greatest amount of work accomplished? A boy lifts a 9-newton box 0.3 meters. A boy lifts a 4-newton box 0.6 meters. A boy lifts a 6-newton box 0.3 meters. A boy lifts a 2-newton box 0.6 meters.