What is a community of organisms at a major regional or global level

Explain convection in as little as possible

Kepler-186f is much closer to the sun than earth is to its sun. why is it considered to be in the habitable zone even though it's close to a sun

A wave has a wavelength of 7 mm and a frequency of 19 hertz. What is its speed?

When electromagnetic fields interact with charged particles,

A river flows due south with a speed of 1.4 m/s. you steer a motorboat across the river; your velocity relative to the water is 4.7 m/s due east. the river is 660 m wide.

A light ray is incident on a reflecting surface. If the light ray makes a "35°" angle with respect to the normal to the surface, what is the exact angle (in degrees) made by the reflected ray relative to the normal?

Reimbursement means that a client is A. able to apply for healthcare insurance and refunded for a partial sum of the payment plan by the state. B.

Meg runs a 10km race in 45 minutes (0.75 hours). What was her speed in kilometers per hour? a. 22 km/hr b. 7.5 km/hr c. 4.5 km/hr d. 13 km/hr

If you are an astronaut slowly drifting away from the space station, you might be able to drift back to the station by throwing a 555-kg tool rapidly in the direction that you are traveling (away from the station) A. False B. True C. Don't ask me D.

The loss of an electron from a neutral helium atom results in