How much work is required to bring three protons, initially infinitely far apart, to a configuration where each proton is 1.5×10−15m from the other two? (this is a typical separation for protons in a nucleus.) express your answer using two significant figures.
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Ответ:
Explanation:
The work done(W) in bringing 2 protons to a separation 'r' is given as:
where,
k= coulomb's constant = 9 × 10⁹ N
q = charge of protons = 1.6 × 10⁻¹⁹ C
Now, the third charge (or proton) is brought near the other two protons
Thus, work done against both these is
Now,
The total work done (W) =![W_1 +W_2+W_3=3\frac{kq^2}{r}](/tpl/images/0109/7268/fd4df.png)
or
or
Ответ:
Heat required to raise the temperature of coffee is given as
Explanation:
As we know that the mass of the coffee is given as
m = 0.5 kg
specific heat capacity is given as
s = 4186 J/kg C
Now we know that the heat required to raise the temperature of coffee is given as
now we have