Calculate the minimum wavelength (λ0) for the continuous spectrum of x-rays emitted when.. a) 30-kv electrons strike a cobalt (co) target
b) 60-kv electrons strike a copper (cu) target

Explanation:

The relationship between the wavelength and the potential difference V is given by :

Putting the values of known parameters,

(a)

(b)

Hence, this is the required solution.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

this could be newton#'s law of cooling. the cooling curve is exponential