Answer:
Explanation:
We are going to use the accelerated motion formula 
on the vertical component taking the upwards direction as positive.
Since <em>at maximum height the speed will be 
</em>, the formula can be written as 
, which for our values is:
Written to three decimal places.
Answer: 1.64 *10^19 electrons
Explanation: In order to the explain this problem we have to consider the following:
The current= charge/time; so
as the electrons move in the tungsten wire we have:
0.526 C/s= N electrons per second* charge of electron=
N electrons/s= 0.526/1.6*10^-19= 3.28 *10^18 electrons/s
Then, during 5 seconds will pass:
3.28 *10^18 electrons/s*5 5s= 1.64 *10^19 electrons
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Explanation:
we know,
F = mg
where m is mass of object and g = acc. due to gravity (9.8 ) m/ s^2
147 = m x 9.8
147/ 9.8 = m
15 = m
therefore mass of object = 15 kg
