Explain what it means when we describe an ecosystem as being in equilibrium

The angular velocity of a flywheel obeys the equation ωz (t) = A+Bt2, where t is in seconds and A and B are constants having numerical values 2.65 (for A) and 1.60 (for B). Required: a. What are the units of A and B if ωz is in rad/s? b.

A gust of wind blows an apple from a tree. As the apple falls, the force of gravity on the apple is 9.39 N downward, and the force of the wind on the apple is 1.54 N to the right. What is the magnitude of the net external force on the apple?

If the north pole of a magnet in a compass is attracted to Earth's geographic north, what must be the polarity of Earth's magnetic north pole? A. north B. south C. It can't be determined from the information given.

The amplitude of a standing sound wave in a long pipe closed at the left end is sketched below. The vertical axis is the maximum displacement of the air, and the horizontal axis is along the length of the pipe.

How do modern scientists describe the make up of matter

Muscle control is the ability to quickly change directions and make complex movements

According to the first law of thermodynamics, what could happen when heat is added to a system? The internal energy of the system decreases. The heat is turned into work done by the system. New energy is created within the system.

How does a parallel circuit differ from a series circuit? A. A parallel circuit has one path for electrons, but a series circuit has more than one path. B. A series circuit has one path for electrons, but a parallel circuit has more than one path. C.

When a potassium ion (k+) enters a gaurd cell it creates a solution of what?

If two plates diverge at a rate of 1.3 cm/year, how much farther apart will the plates be after 200 million years?