Answer:
c
Explanation:
energy doesnt affect to mass of a object
The arrow in chemical equation means 'turns into' i think
By using Ohm's law, we can calculate the resistance of the wire. Ohm's law states that:

where V is the potential difference across the conductor, I is the current and R the resistance. Rearranging the equation, we get

Now we can use the following equation to calculate the length of the wire:

(1)
where

is the resistivity of the material
L is the length of the conductor
A is its cross-sectional area
In this problem, we have a wire of copper, with resistivity

. The radius of the wire is half the diameter:

And the cross-sectional area is

So now we can rearrange eq.(1) to calculate the length of the wire:
Answer:
(a) There are 3.17 times more shakes in a second than seconds in a year.
(b) Humans have existed for 9067.72 universe seconds.
Explanation:
(a) First we calcule how many seconds are in a year. One year have 365 days, one day has 24 hours, one hour has 60 minutes and one minute has 60 seconds, so:

Now, we calculate how many shakes are in a second:

Finally, we calculate how many more shakes in a second are there than seconds in a year:

(b) Using a simple rule of three we can calculate how many "universe seconds" have humans existed, recall that 1 day has 86400 seconds:
1010 years--------->86400s
106 years----------> x seconds
