Answer:
C) Emf is the force exerted on a single charge to move it from one terminal to the other of an emf device.
Explanation:
Electromotive force, abbreviation E or emf, electrical energy per unit supplied from an energy source, such as an electrical generator or a battery. In the engine or battery, electricity is transformed from one source to another as the device works on the electrical charge that is passed within itself.
In physics it is defined as Work done by a cell or battery in moving a unit charge from its one terminal to the other, against the potential.
Hence C is correct
Acant help you because some letters are blocked out sorry.<span />
You can use conservation of momentum, Ramon has a momentum of m * v = 59.0 * 1.20 = 70.8. James must have that same momentum so m * v = p -->
p / m = v --> 70.8 / 85.0 = 0.83 m/s for James
Answer:
300 meters south
Explanation:
Displacement is a vector that connects the initial position with the final position of the motion.
In order to find the net displacement, we must add the distance covered in each part of the motion, considering the proper sign. We take the following convention:
North --> +
South --> -
So, John made the following trips:
Home --> school: 250 m north = +250
School --> home: 250 m south = -250
Home --> school: 250 m north = +250 m
School --> friend's house: 550 m south = -550 m
So, the net displacement is
d = +250 -250 +250 -550 = -300
So, 300 m south.
