Two conductors having net charges of +16.0 HC and -16.0 HC have a potential difference of 16.0 V between them. (a) Determine the
1 answer:
Answer:
(a) Capacitance is
(b) Potential difference is 256 V
Solution:
As per the question:
Charges on the two conductors, q is and
The potential difference between the charges, V = 16.0 V
Now,
(a) The capacitance of the system is given by:
q = CV
(Since, )
Now,
(b) When the charge, 'q' is increased to and
q = CV
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Answer:
a) 3.43 m/s
Explanation:
Due to the law of conservation of momentum, the total momentum of the bullet - rifle system must be conserved.
The total momentum before the bullet is shot is zero, because they are both at rest, so:
Instead the total momentum of the system after the shot is:
where:
m = 0.006 kg is the mass of the bullet
M = 1.4 kg is the mass of the rifle
v = 800 m/s is the velocity of the bullet
V is the recoil velocity of the rifle
The total momentum is conserved, therefore we can write:
Which means:
Solving for V, we can find the recoil velocity of the rifle:
where the negative sign indicates that the velocity is opposite to direction of the bullet: so the recoil speed is
a) 3.43 m/s
Answer:
2,38kg
Explanation:
Mass in function of time can be found by the formula: , where
is the initial mass, t is the time and k is a constant.
Given that a sample decay 1% per day, that means that after first day you have 99% of mass.
, but
, so we have
, then
Now using k found we must to find .