The battery capacity of a lithium ion battery in a digital music player is 750 ma-h. the manufacturer claims that the player can operate for eight hours if the battery is initially fully charged. given this information, determine the number of electrons that flow through the player as you listen to your favorite songs for three hours.

a. 6.2 times 10^18 electrons
b. 1.0 times 10^3 electrons
c. 2.4 times 10^9 electrons
d. 6.3 times 10^21 electrons
e. 8.1 times 10^28 electrons

The number of electrons is

(D) is correct option.

Explanation:

Given that,

Battery capacity = 750 mA-h

Time t= 8 hours

Time t'=3 hours

We need to calculate the battery capacity

We need to calculate the number of electrons in 1 C Li

Using formula for number of electron

We need to calculate the number of electron in 2700 C

The total number of electrons battery can deliver in 8 hours

We need to calculate the number of electron in 3 hours

Using formula of number of electrons

Put the value into the formula

Hence, The number of electrons is

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min