if you double the number of crickets nearby, the chirp rate will a) doubled b) be halved c) remain the same d) none of these

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?