Answer:a.Dry cell
Explanation: A dry cell is a type of electric battery, commonly used for portable electrical devices like a flashlight
The speed should be slower at the top of the ramp and gain speed toward the bottom of the ramp
The average speed of an equatorial point is given by the ratio between the distance covered during one complete rotation (therefore, the circumference of Jupiter at the equator) and the time to complete one rotation:
where S is the circumference and t the time.
The radius of Jupiter is
so the circumference at the equator is:
While the time to complete one rotation is (in seconds)
Therefore the average speed of a point at the equator is
Magnetic field lines always forms closed loop in such a way that it originates from North pole and then terminates back into the South pole
Inside the magnet we will draw the field lines from south pole to north pole
So it is not possible that magnetic field lines originates from north pole and again terminates at the same pole
So this is
FALSE
The bike is maintaining "constant velocity". He's moving at 15 m/s when we see him for the first time, 15 m/s later that day, and 15 m/s next week.
The car starts from zero, and goes 4.0 m/s FASTER each second. After one second, it's going 4.0 m/s. After 2 seconds, it's going 8 m/s. And after 3 seconds, it's going 12 m/s.
This is the point at which the question wants us to compare them ... 3 seconds. The bike is moving at 15 m/s and the car has sped up to 12 m/s. <em>The bike is moving faster than the car.</em>
If we hung around and kept watching for another second, the car would then be moving at 16 m/s, and would be moving faster than the bike. But we lost interest after answering the question, and we left at 3 seconds.