Which element in the earth's atmosphere is essential for human life, is extremely rare or nonexistent in the atmospheres of other planets in our solar system, and is primarily responsible for the development of life outside the oceans?

Why do animals that are least specialized have a better chance at survival?

A pendulum makes 36 vibrations in 60 seconds, what is its: Period? And Frequency

You're conducting a physics experiment on another planet. You drop a rock from a height of 2.1 m and it hits the ground 0.6 seconds later. What is the acceleration due to gravity on this planet? A. 7.0 m/s2 B. 9.8 m/s2 C. 11.7 m/s2 D. 5.

Calculate the power of convex lens of focal length 20cm

How does an explosive eruption produce pyroclastic flow?

For a projectile launched from the vertically from the surface the earth with initial velocity v0, the velocity of the projectile when at distance r from the center of the earth satisifes the equation: v^2 =

What is the formula for convection?

A 398-kg boat is sailing 14.0° north of east at a speed of 1.50 m/s. 23.0 s later, it is sailing 33.0° north of east at a speed of 4.40 m/s. During this time, three forces act on the boat: a 32.8-N force directed 14.

You use sunglasses to reduce the glare of the sun when you go outside. You are taking advantages of light's ability to do which of the following? Possible Answers: to reflect to refract to diffract to polarize

Is light made of elements and atoms