Answer:
53 m/s
Explanation:
Since we take the positive x-direction to be toward the north, an SUV travelling to the south would have a negative velocity, -18m/s, relative to Earth. Velocity of Earth relative to the SUV would be 18m/s. And velocity of police car relative to Earth would be positive, 35 m/s.
Velocity of police relative to SUV would equal to velocity of police car relative to Earth plus velocity of Earth relative to SUV
= 35 + 18 = 53 m/s
They all travel by the same speed and light
Answer:
Explanation:
First of all, let's find the cross-sectional area of the copper wire. The radius of the wire half the diameter:
So the area is
Now we can calculate the resistance of the piece of copper wire between the bird's feet, with the formula:
where
is the resistivity of copper
is the length of the piece of wire
is the cross-sectional area
Substituting, we find
And since we know the current in the wire, I=149 A, we can now find the potential difference across the body of the bird, by using Ohm's law:
The answer is c. It starts in the past by saying he "bought" then shifts to present by saying "goes" and "buys" but then shifts back to past by saying "last week"
hope this helps
