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LenaWriter [7]
3 years ago
10

How many Joules are there in 3301 calories? (1 cal = 4.18 J)

Chemistry
2 answers:
Schach [20]3 years ago
7 0

Answer:

13798.18 J

Explanation:

3301 cal * 4.18 J/1 cal = 13798.18

Recall that (1 cal = 4.18 J)

laila [671]3 years ago
4 0
The answer to this question is (13811384) Joules.
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Convert 90.23 kPa into atm
svlad2 [7]

Answer:

The answer is

<h2>0.89 atm </h2>

Explanation:

To convert from kPa to atm we use the conversion

101.325 kPa = 1 atm

If

101.325 kPa = 1 atm

Then

90.23 kPa will be

\frac{90.23}{101.325}  \\  =0.89050086...

We have the final answer as

<h3>0.89 atm</h3>

Hope this helps you

6 0
3 years ago
1. Which of the following statements about mechanical waves is true?
Anna [14]
1. The answer is "a".

<span>
Mechanical waves require a medium to travel. If there is no medium, the mechanical wave doesn't travel. Since, they are waves; they have a wavelength, frequency, speed and also amplitude. The speed depends on the medium and type of the wave. An example for the mechanical waves is sound wave.</span>


<span>2. E = hf, where E is energy, h is plank constant and f is the frequency. Hence, if the frequency is high, then the energy is high. </span>


v = fλ , where v is the speed, f is the frequency and λ is the wavelength. If the frequency is high, then the wavelength is low.


According to the given choices, gamma rays have the shortest wavelength and highest energy on electromagnetic spectrum.


3. The wavelength of X-rays are smaller the wavelength of infrared.

<span>According to the v=fλ, lower the wavelength, then higher the frequency.  According to the E = hf, if the frequency is high, then the energy is also high. </span>


Hence, the correct answer is "d"


4. <span>In a longitudinal wave (compression wave) the particles of a matter move </span>parallel. 


There are two types of waves according to the particle movement. They are transverse waves and longitudinal waves. In transverse waves, the particles of the medium move perpendicular to the direction of the wave and longitudinal waves have parallel movement of particles to the direction of wave.


5. In regard to spend of sound, sound travels slowest in gases.

 

<span>Solids have the highest speed of sound while gases have the lowest. This is because of the particle arrangement of each phase. Solid phase has very tightly packed particle arrangement and due to that the transfer of sound wave in easy than in gases.</span>

6 0
3 years ago
SOMEONE HELP ME PLEASE ILL GIVE BRAINLY!
dolphi86 [110]

Answer:

It would be a physical change, because the atoms are rerranging to form new molecules!

Explanation:

3 0
2 years ago
Mr. Fuller assigned his science class a lab comparing the masses of objects to the nearest gram using a balance. The mass of a p
zaharov [31]
Like about 15 paper clips to balance the scale
6 0
3 years ago
Read 2 more answers
Consider the following four solutions: a. NaCl in water b. Acetic acid in water c. Acetic acid in benzene d. Naphthalene in benz
Softa [21]

Answer:

NaCl in water; ion-dipole interaction

Explanation:

Sodium chloride is an ionic solid. Ionic solids dissolve in water due to ion dipole interaction. Ionic solids are composed of an ion pair which are strongly bound by electrostatic interaction between the oppositely charged ions in the solid state.

When an ionic substance is dissolved in water, the positive ion interacts with the negative end of the dipole in water while the negative ion interacts with the positive end of the dipole in water. Hence the ions are pulled apart by this ion-dipole interaction and the crystal structure of the solid collapses as the ionic solid dissolves in water.

Sodium chloride is an ionic solid. Interaction between the sodium ion and the negative end of the dipole in water as well as chloride ion and the positive end of the dipole in water leads to the dissolution of sodium chloride solid in water. This is the strongest solute-solvent interaction in the list.

6 0
4 years ago
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