Helpful ways: braking - it makes the wheels slow down faster, friction from the chain
harmful: when you fall and slide across the ground, when you get your leg stuck in the chain
Answer:
or -0.000250 C
Explanation:
The field points downward, which is the direction of a positive charge. In order for the penny to rise, it has to have a negative charge since its direction is opposite that of the field.
To calculate the magnitude of the charge:
The penny is to accelerate upward so it must overcome gravity. Hence, the net force to cause it to accelerate it upward is the difference between the electrostatic force and its weight.
Now, the electric field intensity is given by
where q = charge
to 3 significant figures.
In standard form, q = The negative sign indicates it has a negative charge, as explained initially.
"<span>The process by which your body converts food into energy", sounds more accurate.
"</span><span>The amount of potential energy contained in food", is basically a long way of saying - Calories.
So, I would go with the one that talks about the process of converting food to energy.</span>
Answer:
Keepers also have a useful safety function, as they stop external metal being attracted to the magnet. ... A keeper for low-coercivity magnets is just a strong permanent magnet that keeps all the domains pointing the same way and realigns those that may have gone astray.
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