If the voltage across a circuit of constant resistance is doubled, how is the current in the circuit affected?

The current in the circuit will also get doubled.

According to ohm's law voltage is directly proportional to the current.

VαI

So if the voltage get doubled, the current will also get doubled

the reason is because the moon has some form of gravity, and that gravity pulls the ocean tides.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000