Heat used by electric heater :
Q = m • c • ∆T
Q = (75 kg)(4200 J/kg°C)(43°C - 15°C)
Q = 8.82 × 10⁶ J
Cost of electrical energy :
Cost = (8.82 × 10⁶ J)/(3.6 × 10⁶ J) • ($ 0.15)
Cost = $ 0.3675
Answer: Its A because i had the same question and it was a
Decrease the amount of force applied
It's most likely the combination of a bucket and the wheel.
Answer:
The purpose of step 1 is to induce magnetism into the needle, so that it retains magnetism and behaves as a magnet after the process.
Explanation:
The method of production the needle magnet in the procedure is the single stroke. This process involves a continuous stroking of a magnetic object (e.g needle) repeatedly for a period or number of times with a permanent magnet. Thus, when the permanent magnet is removed, the object retains magnetism, and behaves like a magnet.
The importance of the stroking process is the turn a magnetic object to a magnet by inducing magnetism into it.
