Which diagram models a hypothetical situation in which every location on earth would have 12 hours of daylight and 12 hours of d
2 answers:
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Answer:
0.3nanocouloumb
Explanation:
Pls see attached file
Answer:
E. Some charges in the region are positive, and some are negative.
Explanation:
Electric potential is given as;
where;
W is the work done in moving a charge between two points which have a difference in potential
Q is quantity of charge in the given region
If the electric potential at a given point in the region is zero, then sum of the charges in the given region must be equal to zero. For the charges to sum to zero, some will be positive while some will be negative,.
Therefore, the correct statement in the given options is "E"
E. Some charges in the region are positive, and some are negative.
Answer:
a)
b)
c)
d)
Explanation:
a) To find the <u>highest point</u> of the ball we need to know that at that point the ball stops going up and its velocity become 0
Solving for y
b) To find how long does it take to reach that point:
<em><u>Solving for t</u></em>
c) To find how long does it take to hit the ground after it reaches its highest point we need to find how long does it take to do the whole motion and then subtract the time that takes to go up
Solving for t
<em>or </em>
Since time can not be negative, we choose the second option
d) To find the <u><em>velocity</em></u> when it returns to the level from which it started we need to use the following formula:
The sign means the ball is going down