when you push up it will make a stronger push hope this helps you!!!!!!!!!!! :)
For the given question above, there are other details that is missing. Here is what I got from my research.
Mass of a hydrogen atom as 1.008 u,
<span>where 1 u=1.661 times 10^-27 kg.
</span>The frequency of a mass on a spring is:
<span>f = omega / 2pi = sqrt (k/meff) / 2pi </span>
<span>The meff you use is the effective mass. If two bodies with mass M and m are both free to move: </span>
<span>Meff = Mm / (M+m) </span>
<span>If M=m, then Meff = m/2 (as you were given) </span>
<span>So the answer is: </span>
<span>f = sqrt (2k/m) / 2pi </span>
Yes because if energy could have a positive change why can you not have a negative change
The correct option is
<span>D) can be transformed to different voltages
In fact, transformers can be used in order to change the voltage of an alternating current. This feature is particularly useful, because it allows to transmit electricity through power lines using very high voltages, and this allows to reduce the power dissipated along the lines.
In fact, the power generated by a power station is the product between the current and the voltage:
</span>
<span>So the current is:
</span>
(1)
<span>
The power dissipated along the transmission line, instead, is given by
</span>
<span>and if we use (1) inside this, we find
</span>
<span>so we see that the higher the voltage, the lower the power dissipated along the transmission lines.
Then, transformers are also used at the end of the power lines, in order to convert these very high voltages into the standard voltage (e.g. 240 V) used by household appliances.</span>