Atruck travels at a constant speed of 45 kilometers per hour. how far does the truck travel in 20 minutes?

Write a question about how changing temperature affects the gas inside the sports ball

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=