Test variable (independent variable):The food, pollution, and predators. Outcome variable (dependent variable):The population Control group.

Control group: a regulated species.

Data:
Record your data from each trial in the data chart below:
Type of Factor
Beginning Frog Count
Simulation 1 (Low)
Simulation 2 (High)
Predators (alligators):

Pollution:

Food (mosquitoes):

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

What happens when a rubber rod is rubbed with a piece of fur?