The next two questions refer to this situation: a rectangular loop with sides of length a= 1.00 cm and b= 2.70 cm is placed near a wire that carries a current that varies as a function of time:
i(t)=3.62+1.49t2
where the current is in amperes and the time is in seconds. the distance from the straight wire to the closest side of the loop is d= 0.460 centimeters.
a-what is the magnetic flux through the loop at time t= 2.90 seconds? (define positive flux into the page.)b-what is the induced e. m.f. in the loop at time t= 2.90 seconds? (note that positive emf is clockwise.)

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?