Answer:
11.25J
Explanation:
15=(output/75)x100
output =(75x15)/100=11.25J
Explanation:
The given data is as follows.
Speed of the bullet (v) = 500 m/s
Distance during one RC time constant (d) = 1 mm = 
Capacitance (C) = 600
= 
Hence, formula for speed of the bullet is as follows.
v = 
or, t = 
Time constant for RC circuit is as follows.
t = RC
R = 
= 
= 
= 
Thus, we can conclude that resistance in the flash tube is
.
Answer;
<u>= 56.96 mA</u>
Explanation;
From the Ohm's law;
V = IR, where V is the potential difference in volts, I is the electric current in amperes and R is the resistance in ohms.
V = 4.5 volts, R = 79 Ω
Making I the subject of the formula we get;
I =V/R
= 4.5 /79
= 0.05696 A
But, 1 A = 1000 mA
Thus; 0.05696 × 1000
<u>= 56.96 mA</u>