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3 years ago

I WILL MARK BRAINLIEST If the number of crests that pass a point in a given time increases, what has decreased?

2 answers:

6 0

Wavelength decreases as frequency increases.
Taylor Swift was observing the amplitude of the waves as compared to the day before.

stira [4]3 years ago

5 0

Answer:

For 1: The correct answer is Wavelength.

For 2: The correct answer is Amplitude.

Explanation:

Wavelength is defined as the distance between two crests or two troughs.

Frequency is defined as the number of oscillations that occur in 1 second.

Amplitude is defined as the maximum displacement from its equilibrium position. It is the vertical distance from the crest to the equilibrium position of the wave.

Intensity of the wave is basically the energy of the wave and it is proportional to the square of the amplitude of the wave.

Speed of the wave the is defined as the distance traveled by a given point on a wave.

For 1:

As, the number of crests increases on a point which means that the number of oscillations increases and hence, the frequency increases.

Frequency is inversely proportional to the wavelength of the wave and therefore, increase in frequency will result in the decrease of wavelength.

Hence, the correct answer is Wavelength.

For 2:

When Taylor Swift stood knee deep in the ocean, she noticed that the waves were high as compared to the previous day, which means that the vertical distance of the wave has increased from its mean position.

Hence, the correct answer is Amplitude.

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The vapor pressure of liquid chloroform, CHCl3, is 100. mm Hg at 283 K. A 0.380 g sample of liquid CHCl3 is placed in a closed,

Katyanochek1 [597]

Answer:

100 mm Hg

Explanation:

From the question we are told that

The vapor pressure of CHCl3, is $P = 100 \ mmHg = \frac{100}{760}= 0.13156 \ atm$

The temperature of CHCl3 is $T = 283 \ K$

The volume of the container is $V_c = 380mL = 380 *10^{-3}\ L$

The temperature of the container is $T_c = 283 \ K$

The mass of CHCl3 is m = 0.380 g

Generally the number of moles of CHCl3 present before evaporation started is mathematically represented as

$n = \frac{m }{M }$

Here M is the molar mass of CHCl3 with the value $M = 119.38 \ g/mol$

=> $n = \frac{ 0.380 }{119.38 }$

=> $n = 0.00318 \ mols$

Generally the number of moles of CHCl3 gas that evaporated is mathematically represented as

$n_g = \frac{PV}{RT}$

Here R is the gas constant with value $R = 0.08206 L \ atm /mol\cdot K$

$n_g = \frac{0.13156* 380 *10^{-3} }{0.08206 * 283}$

$n_g = 0.00215 \ mols$

Given that the number of moles of CHCl3 evaporated is less than the number of moles of CHCl3 initially present , then it mean s that not all the liquid evaporated

At equilibrium the temperature of CHCl3 will be equal to the pressure of air so the pressure at equilibrium is 100 mmHg

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3 years ago

Please help!!!!

Tomtit [17]

Answer 1) Option D : Discrete

Explanation : As in the example the scientist studies about the effects of growing human populations on the biodiversity which is found in a region, and where each region was selected had a different population density of humans from 1 to 10 million per 10 square miles. Then in each region the number of different species that can be found was recorded. So here the numerical data was collected for different regions. So, we can conclude it as discrete because when the variable takes on a countable number of values it is called as discrete.

Answer 2) Option D : The entertainment industry

Explanation : When people had enough time and money with them there was no need of creating the communications industry as it was a need not a luxurious thing. With the creation of Internet industry it is somewhat irrelevant. They had enough of time and money so building a labor industry seems to be a lame choice. So, the option of entertainment industry suits the best.

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3 years ago

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What are two ways to make a saturated solution of NH3 in 100.g H20 at 60°C become unsaturated?

son4ous [18]

The two ways to make a saturated solution are 1 reducing the temperature of the solution and Adding more solute.

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3 years ago

A compound contains nitrogen and a metal. This compound goes through a combustion reaction such that compound X is produced from

tia_tia [17]

Answer:

The correct answer is: X is nitrogen dioxide, and Y is a metal oxide

Explanation:

Combustion of compound of containing nitrogen and metal will give nitrogen dioxide and metal oxide as product. During combustion reaction a compound reacts with oxygen in order to yield oxides of elements present in the compound.

The general equation is given as:

$4M_3N_x+7xO_2\rightarrow 4xNO_2+6M_2O_x$

Hence, the correct answer is :X is nitrogen dioxide, and Y is a metal oxide.

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3 years ago

Which of these is a compound? A. Steel B.Sugar C.Air D.Nitrogen

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Sugar is a compound made of carbon, hydrogen and oxygen.

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3 years ago

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