A runner runs 300 m at an average speed of 3.0 m/s. She then runs another 300m at an average

speed of 6.0 m/s.

What is her average speed for the total distance of 600m?

A 2.0 m/s

B 4.0 m/s

C 4.5 m/s

D 8.0 m/s

Two objects with different masses accelerate at the same rate according to newton's 2nd law, what must be true about the forces pushing objects?

A proton initially at rest is accelerated by a uniform electric field. The proton moves 5.62 cm in 1.15 x 10^-6 s. Find the voltage drop through which the proton moves. (Answer should be positive)

what are the sharp curves nails on animals foot called

Compare and contrast spiral and elliptical galaxies

What advantages do helicopters have over airplanes?

Consider this statement: Air is matter. Which facts best support the statement? A. Balloons can be filled with air. B. Air is essential for life to exist. C. Air has mass. D. Air is not an element. E. To float on air is to be happy. F.

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.

Read the given list of organisms. squirrel, zebra, tortoise, rabbit, horse What best describes the role of these five organisms in a food web?

What are the SI units for specific heat capacity