A 40W lamp wastes 34 J of energy every second by heating its surroundings. What is the efficiency of the lamp?
С
18%
D
85%
A
0.15%
15%
B

Which property of fossils allow scientists to determine the relative rock ages..

What is a possible result of higher air temperature caused by global warming

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors