I’m guessing it’s the last one, trough
Answer:
It is observed that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity. This shows that electric current produces a magnetic effect.
Formula to calculate speed:
Speed=Distance/Time
Distance: 24 m
Time: 3 sec
24/3=8
So the correct answer is 8 m/s
Answer:
Option C is the correct answer.
Explanation:
By Charles's law we have
V ∝ T
That is

Here given that
V₁ = 0.20 cubic meter
T₁ = 333 K
T₂ = 533 K
Substituting

New volume of the gas = 0.3198 m³
Option C is the correct answer.
Answer: 9.9%
Explanation: efficiency = (work output /work input) × 100
Note that, 1 kilocalorie = 4184 joules, hence 22kcal = 22× 4184 = 92048 joules.
Work output = 9200 j and work input = 92048 j
Efficiency = (9200/92048) × 100 = 0.099 × 100 = 9.9%