How is energy transferred between trophic levels in a food chain?

A jet can travel the 6000 km distance between washington, d. c. and london in 6 hours with the wind. the return trip against the same wind takes 7 hours 30 minutes. find the speed of the jet in still air and the rate of the wind.

Which of these is an example of qualitative observation? A. the atomic number of ironnis 26 B. iron nails are attracted to the magnet C. iron is located in the fourth period of the periodic table D.

Motion is always compared to something called

How far would the ball be above a fence 3.0 m (10 ft) high if the fence was 116 m (380 ft) from home plate?

A 7.26kg bowling ball (16 pounds) is at rest what is the net force on the bowling ball

How do invasive species spread? identify three methods. Why do invasive species pose such a threat?

If earth somehow expanded to a larger radius, with no change in mass, how would you're weight be affected? How would it be affected if earth shrunk?

Consider a helium balloon on a string tied to the seat of your stationary car. The windows are closed, so there is no air motion within the car. The car begins to accelerate forward. Which way will the balloon lean, forward or backward

The force of gravity acts upon meteors from the rocky asteroid belt between mars and Jupiter. Where is the force of gravity most likely to pull these meteors

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. Which of the following best describes how such a telephone is able to transmit and receive information? A.