A flat ribbon (strip) of silver having a thickness (t = 0.2 mm) is used in a Hall effect measurement of uniform magnetic field perpendicular to the ribbon, as shown in the Figure. The Hall coefficient for silver is (RH = 0.84 x 10-10m3/c). (a) What is the density of charge carriers in silver? (b) If a current (I = 20 A) %3D %3D produces a Hall voltage (VH = 15 µV), what is the magnitude of the applied magnetic field? Solution

Select the correct answer. anna will wear a black dress when she attends het cousin's wedding. which color(s) does the dress absorb? a. all colors b. no colors c. red and green d. white

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.

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)