Wo stars that are bound together by gravity and orbit a common center of mass are known as A. constellations. B. binary stars. C. galaxies. D. meteoroids.

The amount of matter in a given space or volume is called what?

how does inertia affect collisions between cars?

a peice of titanium metal has a mass of 67.5 gm and a volume of 15 cm cubed. what is the density od titanium?

How much physical activity do adults need

What is a constellation as astronomers define it today? What does it mean when an astronomer says, "I saw a comet in Orion last night"?

Two sailboats leave a harbor in the bahamas at the same time. the first sails at 23 mph in a direction 330°. the second sails at 34 mph in a direction 190°.

What conclusion can be drawn from the statement that an element has high electron affinity, high electronegativity, and a high ionization energy? A) The element is most likely from Group 1A or 2A and in period 1 or 2.

When a cyclist rides past you on the street, this is an example of

Why are galaxies visible

I hockey puck slides across an ice rink more easily than it does across a rough concrete surface why is this