Answer:
(C) , The wires repel
Explanation:
We are given that
Length of wire=L=7 m
We have to find the magnitude and direction of the force that the two segments of this cord exert on each other.
Where
Using the formula
When the wires carrying current in equal current in opposite direction then, the wire repel to each other.
Hence, the wires repel to each other.
Because we can predict the outcome by making a hypothesis from what you already know.
you pick a certain route bc you know the other has more traffic and will take longer even though it is a shorter distance
You cannot average the two speeds in conditions of equal distance. You need equal time..
Look at it this way: 15 m/s for 10 km would take 666.67 seconds.
25 m/s for another 10 km would take 400 seconds. Total time: 1066.67 seconds. Total distance 20 km. This average speed 20000 m/1066.67 seconds = 18.75 m/s.
If you had gone 15 m/s for the same *time* as going at 25 m/s, then you could have averaged the speeds directly.
To get a real feel for this, imagine going at 1 m/s for 10 km, and then going at the speed of flight for the other 10 km. The first part would take 10000 seconds (nearly 3 hours) and the second almost zero time. Would your average speed be half the speed of light?
Answer:
speed and temperature
Explanation:
Two major factors, mass and distance, affect the strength of gravitational force on an object. You witness the first factor in everyday life - more massive objects are heavier weight the force with which an object near the Earth or another celestial body is attracted toward the center of the body by gravity. An object's weight depends on its mass (the amount of matter it consists of) and the strength of the gravitational pull.