A cannon launches a 3.0\,\text {kg}3.0kg3, point, 0, start text, k, g, end text pumpkin with 110\,\text J110J110, start text, J, end text of kinetic energy. What is the pumpkin’s speed?

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=