What do we call the combination of all food chains in a given ecosystem

Why do some devices use batteries and other devices use a wall outlet for power?

Which is described as the flow of charge particles? Electric field frictional force electric current gravitational force

Which of these is true about inherited traits? A. All traits are inherited from only one parent. B. Every trait is controlled by only one gene. C. Traits always follow simple patterns of inheritance. D. Traits may be determined by multiple genes.

An electric dipole with dipole moment p⃗ is in a uniform electric field E⃗. A. Find all the orientation angles of the dipole measured counterclockwise from the electric field direction for which the torque on the dipole is zero. B.

An apple in a tree has a gravitational store of 8J. As it falls, it accelerates constantly until it hits the ground. What is the apple's maximum kinetic energy store? Explain your answer.

Suppose 3 neutrons are released by an atom of U-235 in the first stage of a fission chain reaction. Each of these neutrons has enough energy to cause another fission reaction in another nucleus of U-235, releasing more neutrons.

What is empirical evidence and what's is it not

What is orbital radii?

Which statement about our solar system is false? a. The Kuniper Belt is between Uranus and Neptune. b. The Sun is the only star in our solar system. c. Our solar system is made up of the Sun and other objects that orbit the Sun. d.

We can model a small merry-go-round as a uniform circular disk with mass 88 kg and diameter 1.8 m. How many 22 kg children need to ride the merry-go-round, standing right at the outer edge, to double the moment of inertia of the system?