If the surface temperature of the Sun was about 12,000 K instead of 6,000 K, what is the ratio of power per square meter of the 12,000 K object compared to power per square meter of the 6,000 K objects?

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)