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Temka [501]
3 years ago
9

What was your hypothesis? According to your data, do you think your hypothesis was correct? What is latent heat? How does it sho

w up on a phase diagram? When a substance is absorbing latent heat, what is happening to it? According to your data, what are the melting and boiling points of water? How can you tell? What practical applications are there for this procedure?
Physics
2 answers:
Elanso [62]3 years ago
6 0

Answer:  My hypothesis is that the water was going to melt at 25-degrees Celsius and boil at 100-degrees Celsius. It turns out that my hypothesis was almost correct, the ice actually melted a little sooner. It melted at 20-degrees Celsius. So my hypothesis was incorrect.

Explanation:

Iteru [2.4K]3 years ago
3 0

This is the answer i got.


  My hypothesis is that the water was going to melt at 25-degrees Celsius and boil at 100-degrees Celsius. It turns out that my hypothesis was almost correct, the ice actually melted a little sooner. It melted at 20-degrees Celsius. So my hypothesis was incorrect.

Latent heat is changing phase, and when a change in phase is accomplished at constant pressure temperature is constant. On the phase diagram, latent heat shows up as a "thermal plateau" where the graph is a flat line for a brief portion. The melting point of the ice was about 20-25 degrees celsius when it started turning into water, and at 100 degrees celsius when it started boiling. I could tell because the ice turned into water and the water got very hot.

The practical applications for this procedure were, ice,a pot,and a stove.

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Two forces,one of 12 N and another of 24 N,act on a body in such a way that they make an angle of 90degree with each other.Find
jok3333 [9.3K]

Answer:

26.83 N.

Explanation:

If the angle between two vector is 90°, to get the resultant, we use Pythagoras theorem.

a² = b²+c²......................... Equation 1

Where a = R = Resultant, b =  12 N, c = 24 N.

Substitute these values into equation 1

R² = 12²+24²

R² = 144+576

R² = 720

√R² = √720

R = 26.83 N.

Hence, the result of the two force is 26.83 N.

4 0
3 years ago
A bike rider was moving to the right at a constant speed. Suddenly the wind then starts blowing against her with 3 N of force to
stiks02 [169]

Answer:

The correct option is D

Explanation:

This question can be better understood when discussed using the Newton's first law of motion which states that an object would continue to move with a uniform speed (in a straight line) unless acted upon by an external force. What happens here (in the question) is that the bike rider would have continued moving at a constant speed (to the right) if not for the opposing force of the wind that acted against her (to the left). <u>This wind/force would cause her speed to reduce or slow down (as posited by the law)</u>.

8 0
3 years ago
The atomic mass of an element is defined as the weighted average mass of that element’s
marishachu [46]

Answer:

False

Explanation:

Atomic mass (Also called Atomic Weight, although this denomination is incorrect, since the mass is property of the body and the weight depends on the gravity) Mass of an atom corresponding to a certain chemical element). The uma (u) is usually used as a unit of measure. Where u.m.a are acronyms that mean "unit of atomic mass". This unit is also usually called Dalton (Da) in honor of the English chemist John Dalton.

It is equivalent to one twelfth of the mass of the nucleus of the most abundant isotope of carbon, carbon-12. It corresponds roughly to the mass of a proton (or a hydrogen atom). It is abbreviated as "uma", although it can also be found by its English acronym "amu" (Atomic Mass Unit). However, the recommended symbol is simply "u".

<u> The atomic masses of the chemical elements are usually calculated with the weighted average of the masses of the different isotopes of each element taking into account the relative abundance of each of them</u>, which explains the non-correspondence between the atomic mass in umas, of an element, and the number of nucleons that harbors the nucleus of its most common isotope.

4 0
4 years ago
Predict the products of the combustion of methanol, CH3OH(l).
gregori [183]

Answer:

Carbon dioxide and water

Explanation:

The products of complete combustion are always carbon dioxide and water.

The balanced reaction is:

4 CH₃OH + 3 O₂ → 4 CO₂ + 2 H₂O

8 0
3 years ago
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Elenna [48]
The right answer for the question that is being asked and shown above is that: "The image produced is virtual and of the same size as the object." the image if the object is shifted closer to the lens to a point one focal length away from it is that The image produced is virtual and of the same size as the object.<span>
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3 0
4 years ago
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