A piece of metal has a mass of 20kg and a density of 2.7×10^3kg/m^3.It is attached to a string and immersed in a tank of water. (a) Determine the volume of the object.
(b) Calculate the tension in the string when it is completely immersed.

Adouble-slit experiment is performed with light of wavelength 600 nm. the bright interference fringes are spaced 1.8 mm apart on the viewing screen. what will the fringe spacing be if the light is changed to a wavelength of 400 nm? ?

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?