Answer:
Explanation:
Given that,
The speed of an electron,
We need to find the wavelength of this electron. It can be calculated using De -broglie wavelength concept as :
h is the Planck's constant
So, the wavelength of the electron is . Hence, this is the required solution.
Answer:
250 N
Explanation:
Assuming both girls are pushing in the same direction
Given
Total amount of force,they exert on box= 500 N
let <u>force exerted by Macy</u> =
<u>force exerted by Sam</u>=
⇒ +=500 N
But also given <u>both girls push with equal amount of force</u>
⇒ =
Therefore
+ =500 N
=500 N
=250 N
⇒ =250 N , = 250 N
The latent heat of fusion refers to the solid to liquid or liquid to solid states.
Answer: Option C
<u>Explanation:
</u>
It is known that the inter conversion process from the states of solid to liquid is referred as fusion. So, for these conversions, the external energy in the heat form should be supplied to solid.
This external energy should be greater than the latent heat of solid in order to successfully break the bonds to form liquid. So the change in the enthalpy of the reaction while conversion from solids to liquids are termed as latent heats of fusion.
Even the inter-conversion from liquid to solid state will undergo change in enthalpy where the heat will be released and that is termed as latent heats of solidification. It is found that latent heat of solidification is equal in magnitude but opposite in direction with the latent heats of fusion.
Answer:
student A
Explanation:
It's going the same value
Global warming is the unusually rapid increase in Earth's average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels. ... Temperatures are certain to go up further. Despite ups and downs from year to year, global average surface temperature is rising.