Sometimes, you observe one object, and instead of getting one thermal spectrum, you get two! Below is a spectrum taken of a nearby star. Looking at the spectrum, you should see two clear thermal peaks. The one on the left, peaking in the visible range, is from the star. What's causing the other peak?

It turns out that this peak is being produced by a debris disk surrounding this very young star. Debris disks are commonly seen around young stars - they are usually present during planet formation and then eventually dissipate. What temperature is the material in this disk at? Show your work and explain your reasoning clearly.

Hint: Pay attention to the wavelength units!!

The midpoints? a, b, and c are marked on the histogram. match them to the indicated scores. which? scores, if? any, would be considered? unusual?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec