To find the number of electron that trough the car battery you first calculate the current by using the following formula, which relates the power with the voltage:

$P=IV$ (1)

P: power of both headlights = 2(37.7W) = 75.4 W

I: current = ?

V: voltage of the battery = 12.0 V

You solve the equation (1) for I:

$I=\frac{P}{V}=\frac{75.4W}{12.0V}=6.283A=6.238\frac{C}{s}$

Next, you use the equivalence 1C = 6.241*10^18 electrons:

$6.238\frac{C}{s}*\frac{6.241*10^{18}\ electrons}{1C}=3.921*10^{19}\ electrons/s$

The number of electrons that cross the battery per second is 3.921*10^19 electrons

6 0

4 years ago

Help with atomic mass

Dafna1 [17]

Explanation:

what?? do you please say clearly

3 0

3 years ago

Read 2 more answers

A person of mass m measures their weight with a scale. How does the person’s weight measurement at the equator, WEQ, compare wit

lakkis [162]

Answer:

Weight measurement at poles will be slightly more than at equator.

Explanation:

Firstly earth bulges at equator. This makes the body far from earth center at equator than poles. Secondly, the surface centrifugal forces of earth due to rotation also plays vital role in disturbing the gravity value. The centrifugal forces cancel the effect of gravity more at equator than at poles.These factors combine to create difference of about 0.5% in gravity values at pole and equator.

gravity at pole=9.832 m/s^2

gravity at equator=9.780 m/s^2

5 0

3 years ago