Three wires are made of copper having circular cross sections. Wire 1 has a length l and radius r. Wire 2 has a length l and rad
ius 2r. Wire 3 has a length 2l and radius 3r. Which wire has the smallest resistance?
1 answer:
You might be interested in
Answer:
the average speed of the car is 170 mph.
Explanation:
Given;
initial speed, u = 70 mph
time of motion, t₁ = 3 hours
final speed, v = 20 mph
time of motion, t₂ = 2 hours
The average speed of the car is calculated as;
Therefore, the average speed of the car is 170 mph.
Answer:
The measure of angle B equals the measure of angle C.
Explanation:
When a ray of light falls on a smooth polished surface and the light ray bounces back, it is called the reflection of light.
There are two laws of reflection;
1) The incident ray and reflected ray and normal all lie in the same plane.
2) The angle of incidence is equal to angle of reflection.
Here angle of incidence is represented by B and angle of reflection is by C.
So according to law of reflection the measure of angle B equals the measure of angle C.
