La densidad del metal disminuye a medida que se calienta . Piense en el agua . Cuando hace frío , se convierte en hielo , lo cual es muy densa . Cuando hace calor , se evapora en gas , que no es denso.
<span>Espero que esto no es confuso , yo no soy un hablante nativo de español .</span>
Answer:
Similarities between magnetic fields and electric fields: Electric fields are produced by two kinds of charges, positive and negative. Magnetic fields are associated with two magnetic poles, north and south, although they are also produced by charges (but moving charges). Like poles repel; unlike poles attract.
they attract each other
Explanation:
15) a
16) b
17) a
Hope this helps
Answer:
red laser emits 1.42 times the number of photons of the blue laser, per unit of time
Explanation:
In order to calculate the rates of photon emission for both wavelengths, you take into account that the power of the light is given by the following formula:
(1)
That is, the power is the energy per time.
h: Planck's constant
c: speed of light
λ: wavelength of the light
The number of photons emitted per unit of time is given by:
P: power of the light
E: energy of the light
For the two wavelengths you have
(2)
Where you have use that P1=P2
Finally, you replace the values of the wavelengths in the equation (2):
Then, the red laser emits 1.42 times the number of photons emited by the blue laser
Answer:
A. Area under force-time graph & Area under force-displacement graph
Explanation:
To find the impulse or work done the area under force-time graph and area under force-displacement graph will give us these respective values.
Impulse = Force x time
Work done = Force x displacement
When we plot a graph of force and time, the area under it is the impulse.
When a graph of force and displacement is plotted, the area under is the work done.