Answer:
the answer to the question is the part that is reflected by clouds and atmosphere 26%
Answer:
Explanation:
The answer is C. Both options are correct
Answer:
Explanation:
First of all, we need to calculate the resistance of the piece of copper wire between the bird's feet, which is given by
where:
is the resistivity of copper
is the length of the piece of wire between the bird's feet
is the cross-sectional area of the wire, with r being the radius. Since the radius is half the diameter:
the area is
And the resistance is
And given the current in the wire, I=32 A, we can calculate the potential difference across the bird's body by using Ohm's law:
Assuming the lines need to be straight, I'd go with a triangle (the lines can keep going to infinity too, that's fine). But that only has 3 intersections of 2 lines, if you need all 3 lines to intersect exactly 3 times and need to be straight, it can't be done, I don't think. However, you could lay each line on top of each other to have infinite intersection points, but that's probably not what they want.
The mass of the boy and skateboard is there to throw you off. X and Y velocities are independent of each other, meaning that the only things you need are the velocity of the skateboard and the velocity of the boy. The total velocity of the boy is 7.5 m/s because the boy would still be moving with the 5 m/s that the skateboard has if the boy were to just jump straight up. Since the boy jumps forward with a velocity of 2.5 m/s, you would add them together.
