Which of the following is not a type of system?

Biomedical

Ecological

Social

Biological

(not sure if this is physics but it doesn't give me the option to pick science for subject)

Three guys are standing in a row, facing a solid, high wall. Guy A is 10 m from the wall, B is 20 m away from the wall, and C is 30 m away from it. Guy B shouts. Will any other guy be able to hear an echo of Guy B's shout?

How a suit of armor might be a good analogy for a function of the skeleton system

What has thermal, chemical, and electrical energy

A rolling ball slows down. Which claim about the forces acting on the ball must be true? Choose 1 answer: Choose 1 answer: (Choice A) A There are no forces on the ball. (Choice B) B There is no net force on the ball.

Given the mass, width, and length of a boat how do you calculate how deep the boat will sink in water?

Submarine A and submarine B are heading towards each other. They are both moving at a Steady speed of 5mls. Submarine A produces a pulse of sound to detect submarine B.

The bodies of birds are streamlined. Why. When we strike a matchstick with a rough surface it catches fire. why Grooves are made in tyres. why Discuss how friction plays a vital role in daily life.

What will be the force if they are moved so they are only one-eighth as far apart?

NaBr + H3PO4 = Na3PO4 + HBr

Which example describes constant acceleration due only to a change in direction