According to the figure above, the temperature in the solar nebula at the location now at the center of the asteroid belt is
a) 400kb) 900kc) 2000kd) 100k

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=

You throw a baseball directly upward at time =0 at an initial speed of 14.9 m/s. what is the maximum height the ball reaches above where it leaves your hand? ignore air resistance and take =9.80 m/s2.

Copper has a specific heat of 0.385 j. a piece of copper absorbs 5000 j of energy and undergoes a temperature change from 100 celsius to 200 degrees celsius. what is the mass of the piece of copper?