Which shows the general structure of a carboxylic acid

What is it called when <br> Light changes direction and slows down when it enters water from air.

scoray [572]

This should be called refraction

5 0

2 years ago

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What is used to make the dry cells ????

Alex17521 [72]

Answer: The parts of a dry cell battery are as follows: at the center is a carbon rod called a cathode. The cathode is surrounded by an electrolyte paste. The paste and cathode are surrounded by a separator before finally being sealed within a zinc cylinder.

Explanation: A diagram is show below

3 0

3 years ago

you are riding in a train that is traveling at a speed of 120km/h how long will it take to travel 950km

muminat

The time take for the train to travel 950 Km is 7.92 h

<h3>What is speed? </h3>

Speed is the distance travelled per unit. Mathematically, it can be expressed as:

Speed = distance / time

With the above formula, we can determine the time. Details below:

<h3>How to determine the time</h3>

The time taken for the train t travel 950 Km can be obtained as follow:

Speed = 120 Km/h
Distance = 950 Km
Time =?

Speed = distance / time

120= 950 / time

Cross multiply

120 × time = 950

Divide both side by 120

Time = 950 / 120

Time = 7.92 h

Learn more about speed:

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4 0

1 year ago

A compression, at a constant pressure of 140 kPa, is performed on 4.0 moles of an ideal monatomic gas (Cv = 3/2 R). The compress

kobusy [5.1K]

<u>Answer:</u> The change in internal energy of the gas is 29.414 kJ.

<u>Explanation:</u>

To calculate the temperature of the gas at different volumes, we use ideal gas equation:

$PV=nRT$

When volume = $0.26m^3$

We are given:

Conversion used: $1m^3=1000L$

$P=140kPa\\V=0.23m^3=260L\\n=4.0mol\\R=8.31\text{L kPa }mol^{-1}K^{-1}$

Putting values in above equation:

$140kPa\times 260L=4mol\times 8.31\text{L kPa }mol^{-1}K^{-1}\times T_i\\\\T_i=1095.06K$

When volume = $0.12m^3$

We are given:

$P=140kPa\\V=0.12m^3=120L\\n=4.0mol\\R=8.31\text{L kPa }mol^{-1}K^{-1}$

Putting values in above equation:

$140kPa\times 120L=4mol\times 8.31\text{L kPa }mol^{-1}K^{-1}\times T_f\\\\T_f=505.41K$

To calculate the change in internal energy, we use the equation:

$\Delta U=nC_v\Delta T=nC_v(T_f-T_i)$

where,

$\Delta U$ = change in internal energy = ?

n = number of moles = 4.0 mol

$C_v$ = heat capacity at constant volume = $\frac{3}{2}R$

$T_f$ = final temperature = 1095.06 K

$T_i$ = initial temperature = 505.41 K

Putting values in above equation, we get:

$\Delta U=4\times \frac{3}{2}\times 8.314J/K.mol\times (505.41-1095.06)\\\\\Delta U=29414.1J$

Converting this value in kilojoules, we use the conversion factor:

1 kJ = 1000 J

So, $29414.1J=\frac{1kJ}{1000J}\times 29414.1J=29.414kJ$

Hence, the change in internal energy of the gas is 29.414 kJ.

6 0

3 years ago

A cell is a system of parts that work together to carry out basic life processes. An animal is also a system of parts that work

blagie [28]

Nucleus is like the brain of the cell
Cell wall would be the skin
Cell membrane is the skeletal system
Mitochondria is the digestive system
I hope I’m right

4 0

3 years ago

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