Answer and working shown on photo, final answer for number electrons=2.5*10^17 electrons
Answer:
See attached handwritten document for answer
Explanation:
5 mins
Explanation:
because speed ÷ to distance since the distance is 5 miles the answer is 5mins if not it's 0.2 if the teacher incorrect it
Answer:
20.6 m
Explanation:
P₁ = Power of first bulb = 45 W
P₂ = Power of second bulb = 130 W
r₁ = distance from the first bulb
r₂ = distance from the second bulb = 35 m
Using the equation
![\frac{P_{1}}{r_{1}^{2}} = \frac{P_{2}}{r_{2}^{2}}](https://tex.z-dn.net/?f=%5Cfrac%7BP_%7B1%7D%7D%7Br_%7B1%7D%5E%7B2%7D%7D%20%3D%20%5Cfrac%7BP_%7B2%7D%7D%7Br_%7B2%7D%5E%7B2%7D%7D)
Inserting the values
![\frac{45}{r_{1}^{2}} = \frac{130}{35^{2}}](https://tex.z-dn.net/?f=%5Cfrac%7B45%7D%7Br_%7B1%7D%5E%7B2%7D%7D%20%3D%20%5Cfrac%7B130%7D%7B35%5E%7B2%7D%7D)
r₁ = 20.6 m