An astronaut walking outside a space station can be seen, but not heard. The only way to communicate is through radio transmissions.

what type of wave is this? how do you know?

Calculate the kinetic energy of a 1000 kg moving a speed of 75 m/s

Whats the difference between work and power

Which group on the periodic table would form componds with group 2

Describe variation in the speed of sound through various media.

Buoyant force is the net upward force that affects on the object in a fluid True False

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