Answer:
Explanation:
Given that
At 17°C ,Lo= 20.09 cm
At 306°C ,L= 20.18 cm
ΔL= 200.18 - 20.09 = 0.09 cm
ΔT = 306 - 17 = 289°C
We know that
ΔL = L α ΔT
α =coefficient of linear expansion
ΔL = Lo x α x ΔT
0.09 = 20.09 x α x 289
Coefficient of linear expansion,
Answer:
(a) I = 0.6 A
(b) 22.5 * 10^19 electrons
Explanation:
Parameters given:
(a) Current is given as the time Tate of charge flow. Mathematically,
I = Q/t
Charge, Q = 3 C
Time, t = 5 secs
I = 3/5 = 0.6A
(b) The current flowing through the filament is 0.6A. In 1 min (60 secs), the charge will be:
Q = I*t
Q = 0.6 * 60 = 36 C
An electron has a charge, Qe, of 1.6022 * 10^(-19) C. Hence, the number of electrons will be:
N = Q/Qe
N = 36/(1.6022 * 10^(-19))
N = 22.5 * 10^19 electrons
A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs.
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Answer:
You meant "Negative-charged rod"?
If you did then here's the answer.
Away.
Explanation:
Since, the rod and Balloon both are negatively charged, and we know that like charges repel each other so, the electrons in the rod tend to move away from negatively charged balloon.