When two stars are bound together gravitationally and orbit a common mass, they're known as
a. constellations.
b. meteoroids.
c. galaxies.
d. binary stars.

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

What is the measurement of how fast an object moves relative to a reference point?

Marvin records scientific data about lake superior. for which property has marvin forgotten to use an si unit of measurement? shore length high temperature low temperature annual precipitation