The wavelength of a wave is 4 metre & its time period is 2 second. What is speed of the wave?

Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false

Which of the following statements are evidence that gases do not always behave ideally? check all that apply.? a. co2 gas becomes dry ice (solid co2) at 1 atm and –78.5 °c. b. when two gases are mixed, they follow dalton\'s law of partial pressures. c. at 4 k and 1 atm, helium is a liquid. d. it is impossible to compress a gas enough so that it takes up no volume.

Derive the formula 2as=v² -u² where the formula have have usual meanings