When vinegar and baking soda react, the mixture becomes cold to the touch and a gas and a new liquid substance are formed.
2 answers:
Answer: A: The reaction is chemical and endothermic.
Explanation:
It is a chemical change as the rearrangement of atoms take place and formation of new products take place which includes a liquid and gas.
As the reaction vessel becomes cold to touch, it means the reaction is endothermic which means the energy is absorbed by the reactants to convert to products.
In physical change, the rearrangement of atoms do not take place and no new products are formed. exothermic reactions are the ones in which heat is released and the reaction vessel becomes hot.
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Answer:
The distance between first-order and second-order bright fringes is 12.66mm.
Explanation:
The physicist Thomas Young establishes through its double slit experiment a relationship between the interference (constructive or destructive) of a wave, the separation between the slits, the distance between the two slits to the screen and the wavelength.
(1)
Where is the distance between two adjacent maxima, L is the distance of the screen from the slits,
is the wavelength and d is the separation between the slits.
The values for this particular case are:
Notice that is necessary to express L and in units of milimeters.
⇒
⇒
Finally, equation 1 can be used:
Hence, the distance between first-order and second-order bright fringes is 12.66mm.
Answer:
a = 2710m/s²
Explanation:
See attachment below.
