What are some natural controls that keep an ecosystem community in balance? Select all that apply.

food competition

mate competition

industrial waste dumping

competition for shelter

deforestation

consumption by predator species

If 270 watts of power is used in 42 seconds, how much work is done? (Unit is joules (J), just type the number. Use commas if necessary).

Which factor indicates the amount of charge on the source charge? A. the number of field lines on the test charge B. the number of field lines on the source charge C. the direction of lines on the source charge D.

Frost wedging causes physsical weathering of rock by means of

What happens to the air pressure inside a balloon when the balloon is squeezed to half its volume at constant temperature?

A cylindrical container with a cross-sectional area of 85.2 cm 2 holds fluid having a density of 806 kg/m 3. The surface of the fluid is open to the atmosphere, and the pressure at the bottom of the tank is 106 kPa. What is the depth of the liquid?

A cheetah can run at 30 m/s, but only for about 12s. How far will it run in that time

A car is traveling 80 km/h if the car's speed remains constant how far will it have traveled in 3 hours a. 3km b. 26.7km c. 80 km d. 240 km

True or False? Gases such as water vapor condense when they are * heated*.

If a chromosome on unfolds itself how is transcription enhanced

Two friends, barbara and neil, are out rollerblading. with respect to the ground, barbara is skating due south at a speed of 5.9 m/s. neil is in front of her. with respect to the ground, neil is skating due west at a speed of 1.4 m/s.