Two spaceships of mass 300,000 kg are 250 m apart. what is the force of gravity between them? (G = 6.67 times 10⁻¹¹ N*M²/kg²)

Compared with ultraviolet radiation, infrared radiation has greater (a) wavelength; (b) amplitude; (c) frequency; (d) energy.

A 4.2-m-diameter merry-go-round is rotating freely with an angular velocity of 0.80 rad? s. Its total moment of inertia is 1360 kg? m2. Four people standing on the ground, each of mass 65 kg, suddenly step onto the edge of the merry-go-round.

The Hubble Space Telescope (HST) orbits 569 km above Earth's surface. If HST has a tangential speed of 7,750 m/s, how long is HST's orbital period? The radius of Earth is 6.38 * 106 m.

Explain where in a spiral galaxy you would expect to find globular clusters, molecular clouds, and atomic hydrogen.

Two bicyclists start a sprint from rest, each riding with a constant acceleration. Bicyclist A has twice the acceleration of bicyclist B; however, bicyclist B rides for twice as long as bicyclist A. a.

Which equation relates charge, time, and current? answer A / l = triangle q/t

Martha is measuring the barometric pressure in her back yard every thirty minutes. She records her data in the table below.

A sound wave travels through air. In which regions are air molecules the least dense?

Which of the following is least likely to cause change to an equilibrium system? a. change in pressure b. change in temperature c. change in concentration d. change in wavelength absorption

A ball slows down as it rolls up a hill. this is an example of? A. relative velocity B. negative acceleration C. positive acceleration D. neutral motion