Energy is lost due to friction so it cannot be D, it also cannot be C since you can only have friction during movement, and potential energy is when you have the potential of having an amount of said energy, and friction slows things down, therefore it must be B.
Answer:
Explanation:
Given a material with temperature coefficient of resistance <em>c</em>, the equation that relates the resistance at temperature and the resistance at temperature is
We want to double our resistance, so , thus having:
For this T must be:
which for our values means (with , remember to write temperature in S.I., and that for silver ):
S= 1/2 x 182 x t = 1688.3
t = 1688.3 / 91
time = 18.55 seconds