You are throwing a ball straight up in the air. at the highest point, the ball’s

a. velocity & acceleration are at zero
b. velocity is nonzero but it’s acceleration in zero
c. acceleration is nonzero, but it’s velocity is zero
d. velocity and acceleration are both nonzero

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

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=

Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?