In which of the following eons did the greatest variety of living things exist on earth?

a) hadean

b) archean

c) proterozoic

You're outside on a cold day (Tout = 0 °C) listening to your iPod with an external circular speaker having a diameter 0.0550 m. Because of the cold you decide to go inside where the temperature is 27.5 °C. If your favorite song begins with a 8.

Determine the mechanical energy of this object: 1-kg ball rolls on the ground at 2 m/s A. The ball is on the ground, so the mechanical energy is zero B. 2 J C. 1 J D. 4 J

The length of daylight at a location is related to 1) the stars 2) the moon 3) latitude 4 longitude

Which of the following objects exerts a gravitational force? a. the Sun b. an apple c. a basketball d. the Earth e. the Moon

Gamma rays are negatively charged.

How does melting And burning sugar follow the law of conservation of mass

A hill has three paths up and sides to a flat summit area that three path Lanks are different but the vertical height from the bottom of the mountain to the top is the same A) which path would be easiest for a car to claim B) not including the

Which one of the following is not an organic compound? Why? CH4 C2H6O Ca0

Which structure connects muscles to bone?

A firefighter mounts the nozzle of his fire hose a distance 36.9 m away from the edge of a burning building so that it sprays from ground level at a 45° angle above the horizontal. After quenching a hotspot at a height of 8.