Responda:
30.0066 m
Explicação:
Dado o seguinte:
Temperatura (t1) = 5 ° C
Comprimento (L1) = 30m
Temperatura (t2) = 25 ° C
Coeficiente de expansão linear do aço (α) = 11 × 10 ^ -6 ° C-1
Lembre-se:
Expansibilidade linear (α):
Alteração do comprimento / comprimento original (diferença de temperatura)
α = [ΔL / L1 (ΔT)]
α = [(L2 - L1) / L1 (T2 - T1)]
α * L1 (T2 - T1) = (L2 - L1)
11 × 10 ^ -6 * 30 (25-5) = L2 - 30
11 × 10 ^ -6 * 30 (20) = L2 - 30
11 × 10 ^ -6 * 600 = L2 - 30
6600 × 10 ^ -6 = L2 - 30
L2 = 0,0066 + 30
L2 = 30.0066m
If one tree bumps into another tree, it's entirely possible
that a car could get away without a scratch.
Answer:
=8.0 Watts
Explanation:
Power is a ratio of work done over time. The power in an electric circuit is calculated using the following formula:
P=I²R
P is power, I is current, R is resistance
Therefore, Power= 4²ₓ 0.5Ω
=8.0 Watts
Using fossil fuels to generate electricity doesn't take spinning turbines. Using the force of the wind (wind energy) to generate does contain spinning, though not of generators.
Answer:
C
Explanation:
Fusion and fission are similar in that they both release large amounts of energy. Nuclear fusion is a process in which two nuclei join to form a larger nucleus. Nuclear fission is a process in which a nucleus splits into two smaller nuclei.