Answer:
The correct answer would be A: 3,000.
Explanation:
To find the volume of a box, you have to do l * w * h. You multiply 30, 40, and 25 which gives you an answer of 3,000 cubic centimeters.
Add them together with south being negative. (-350 + 25) to get 325 south
The bread dough needs heat in order for the chemical process to take place, so the answer is “Absorbs energy”. Aka, heat.
Answer:
(a). = 5.43
(b). 13
(C) 0
Explanation:
part A:
φ(outside) = ∬B(outside) dS
note that;
φ(sum) = 2[φ(outside) + φ(inside).
then, we say
φ(outside) = ∫ μI/ 2πr dr (taking boundaries at R - d/2 and d/2.
μI/2πr dr= μI/2πr ln 2R- d/d
= 1.26× 1) ^-6 ×10 ln 40-2.5/2.5.
= 5.43 μWb.
magnetic flux in the conductor can be calculated from magnetic induction as integral of d/2 to R
please note that dS= 1. dr
φ (inside) = B(inside) dS
∫2μIr/ π d^2 dV.
μI/πd2 r^2 (at boundary d/2 and 0)
μI/4π
= 1.26×10^-6 ×10/4π.
= 1.0032 μWb .
where B(inside) = μI(inside)/ 2πr and I= Ir^2/ (d/2) ^2.
φ(sum)= φ(outside + inside)
=2(5.42 + 1.0032
= 13μWb
(c). is zero
Answer:
0.33 mV or 0.00033 V
Explanation:
Parameters given:
Radius, r = 4 cm = 0.04 m
Number of turns, N = 1
Initial magnetic field, Bini = 0.069 T
Final magnetic field, Bfin = 0.043 T
Time, t = 0.4 secs
EMF induced in a coil is given as the time rate of change of Magnetic Flux:
EMF = -ΔΦ/t
ΔΦ = ΔB * A
Where ΔB = change in magnetic field
A = area = pi * r²
EMF = -[(Bfin - Bini) * N * pi * r²] / t
EMF = -[(0.043 - 0.069) * 1 * 3.142 * 0.04²] / 0.4
EMF = 0.00033 V = 0.33 mV