An induction coil has 10×10^5 turns. The number of magnetic field lines through it changes from 4×10^-3wb to 0 in 0.01, Ie, then what is the average induced elecromotive force on the coil during this time?
A. 4×10^4V
B. 4×10^5V
C. 40×10^5V
D. None of the above.

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx