Answer:
q = square root (4KsL³/k)
The force of extension of the spring is equal to the force of repulsion between the two like charges. Two like charges(positive or negative) would always repel each other and two unlike charges would always attract each other. This electric force between the charges is what is responsible for the stretching of the spring. The electric force causes the spring to increase in length from L to 2L. Equating these forces, that is the electric force between the charges and the elastic force of the spring and rearranging the variables gives the expression to obtain q.
Explanation:
See the attachment below for full solution.
To be honest with you, there's not enough information here to calculate
the answer, because we don't know the power consumption of the front
porch light. The best we can do is represent that as a variable ... pick a
catchy name for it, which will show up in the final answer, and then you
can 'plug in' (get it ?) whatever size light bulb you want to use over the
front porch.
OK. First we have to give it a name. I could use a single letter, but
that's what everybody else always does. Remember ... this is going to
represent the power (watts) consumed by the front porch light when it's
turned on. It's the symbol that means "Front Porch Light Power" wherever
you see it. I could easily call it x or y or z, but I'm going to call it " FPLP ".
OK. FPLP = power consumption of the light, in watts .
0.001 FPLP = power consumption of the light, in kilowatts (kW).
(1 week) · (7 day/week) · (24 hour/day) = 168 hours .
Energy = (power) · (time) = (0.001 FPLP) · (168 hr) = 0.168 FPLP kWhours
Cost = ($0.17 per kWh) · (number of kWh) = (2.86¢) · (FPLP) .
There it is !
For an example, if you use a 100-W bulb in the front porch light,
then FPLP=100 W. If you leave it on 24/7 for a whole week, then
it's going to cost
(2.86¢) · (FPLP) = (2.86¢) · (100 W) = $2.86
Answer:
Explanation:
The given time is 1 / 4 of the time period
So Time period of oscillation.
= 4 x .4 =1.6 s
When the block reaches back its original position when it came in contact with the spring for the first time , the block and the spring will have maximum
velocity. After that spring starts unstretching , reducing its speed , so block loses contact as its velocity is not reduced .
So required velocity is the maximum velocity of the block while remaining in contact with the spring.
v ( max ) = w A = 1.32 m /s.
Answer/Explanation: As mentioned above, the characteristic chemical property of a metal atom is to lose one or more of its electrons to form a positive ion. However, certain metals lose electrons much more readily than others. In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li).
-Bababooeyboy
Answer:
The total number of significant figures is twelve.
Explanation:
