A100-turn coil with an average radius of 0.04 m is placed in a uniform magnetic field so that ϕ = 60°. the strength of the field increases at a rate of 0.250 t/s. what is the magnitude of the resulting emf?

Five

This is exactly like your question 2. You need only substitute the given numbers here.

Givens

Formula

e = N * delta B  * Area * cos phi

Solution

e = - 100 * 0.25 *  5.02 * 10^-3 * 0.5

e = 0.0628 = 0.063

Answer

A

Six

This is a notes question. The result is a sine curve. I don't know how they are counting the change in direction. Is a rising curve different from a falling curve? For sure going from plus to minus is a change in direction, but I still don't know how to count it. It will depend on what you  have been told.

I would answer 4 but this is by no means certain. The only other possible answer is 2

its c i just checked it

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.