Answer:
D
Explanation:
energy can not be created or destroyed it can only be transferred or changed to one form to another.
The frequency of wavelength of 1km <u>299792.458 Hz.</u>
These molecules already react to the inward motion of the loudspeaker membrane moving toward the source. Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.
calculation:-
C= wavelength × frequency
frequency = 3 × 10⁸/ 1000 Hz
= 299792.458 Hz.
= 3 ×10⁵ Hz
Based on such a model, we found that mass is not an intrinsic property of the particle. Instead, mass is basically a measure of particle energy. The relations between energy and mass can be directly derived based on the wave properties of the particle. Waves are one of the ways in which energy may be transferred between stores. Waves can be described as oscillations or vibrations about a resting position.
Learn more about The wavelength here:-brainly.com/question/10728818
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Answer:
mercury or Hg
Explanation:
i looked at the periodic table haha
hope this helps and is right <3
Answer: It is number a
a. Cold is removed from the container of water until the rock, the container, and the water all reach the same final temperature.
Answer: 8.7 grams
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 
of particles.
To calculate the moles, we use the equation:
As oxygen is in excess, Aluminium is the limiting reagent and limits the formation of products.
According to stoichiometry:
4 moles of aluminium give = 2 moles of 
Thus 0.17 moles of aluminium give=
Mass of 
Thus the mass of is 8.7 grams
