A source from which organisms generally take elements is called a/an

A. biotic community.

B. reservoir.

C. exchange pool.

D. food web.

A penny falls from a windowsill which is 25.0 m above the sidewalk. How much time does a passerby on the sidewalk below have to move out of the way before the penny hits the ground?

How many isotopes can an element have?

Which of the following correctly compares the uses of bar graphs versus pie charts? Bar graphs show patterns in data with variables that change over time; whereas, pie charts show data as parts out of a whole (such as out of 100%).

What is the identify atom shown

During the spin cycle of your clothes washer, the tub rotates at a steady angular velocity of 33.9 rad/s. Find the angular displacement Δθ of the tub during a spin of 92.1 s, expressed both in radians and in revolutions.

The net change in energy equals the energy transferred as work and as heat is called what

The law of conservation of energy states that momentum is conserved in a collision. true or false

When the driver steps on the accelerator, the drive wheels of the car push horizontally against the ground with a force of 4500 N.

What is the monument of a 1200 kg truck traveling at a speed of 25 m/s?

If a cheetah runs at 25 m/s, how long will it take a cheetah to run a 100 m dash?