What organism would be at the top of the energy pyramid

A) algae

B) barracuda

C) reef shark

D) snapper fish

A ball is dropped from an upper floor, some unknown distance above your apartment. As you look out of your window, which is 1.5 m tall, you observe that it takes the ball 0.18 seconds to traverse the length of the window.

An airplane flies eastward and always accelerates at a constant rate. At one position along its path, it has a velocity of 30.7 m/s. It then flies a further distance of 41300 m, and afterwards, its velocity is 49.1 m/s.

What type of force pulls in two opposite directions?

Are fat fish more likely to have broad stripes than thin fish

Is this argument valid or invalid? Why? What did you consider when determining whether this argument uses proper reasoning? If students earn college degrees, they tend to make more money. Chris earned a college degree.

What is the formula for calculating mechanical power

The ability to do work is called what?

How can the speed of a mechanical wave energy be calculated

A hollow sphere of negligible mass and radius R is completely filled with a liquid so that its density is rho. You now enlarge the sphere so its radius is 2R and completely fill it with the same liquid. What is the density of the enlarged sphere?

Assume that you stay on the Earth's surface. What is the ratio of the sun's gravitational force on you to the earth's gravitational force on you? Express your answer using two significant figures.