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OLga [1]
3 years ago
11

Why do you think the temperature does not change much during a phase change? If possible, discuss your answer with your classmat

es and teacher.
Physics
1 answer:
skelet666 [1.2K]3 years ago
6 0

Answer:

Explanation:

The fact is that there exists no temperature change until a phase change is complete. That is to say, during a phase change, the energy that will be supplied is used only to separate the molecules. There is no part of it is used to increase the kinetic energy of the molecules. So its temperature will not rise, not really, since the kinetic energy of the molecules remains the same. Also, it should be noted that the average kinetic energy of the molecules does not change at the moment that melting occurs, thus the temperature of the molecules does not change.

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Provide one example of this law during a physical change.
Sergio [31]

Answer:

physical

Explanation:

physical is physical yes.yes because wkwkwkwkwkwkwkwkkwkwkwkwkkwkkwkwkwkwkwkwkwkwkkwkwkwkwkwkwkwkkwkwkwkwkwk

8 0
3 years ago
Analyze the explanation and identify any false statements. Each statement to be analyzed is identified by a capital letter. A ba
Sladkaya [172]

Answer:

Explanation:

The rotational kinetic energy remains constant as long as the length and angular speed are fixed.

Statement A is true.

When the ball is pulled inward and the length of the string is shortened, the rotational kinetic energy will remain constant due to conservation of energy,

Statement B is false .

Reason - Conservation of energy will not be there because external work is done on the system  by the force that pulls it inward.  

but the angular momentum L will not remain constant because there is an external force acting on the ball to pull it inward

Statement C is false .

Reason - the angular momentum L will remain constant because there is an external force acting on the ball which acts perpendicular to the velocity of the ball .

The moment of inertia I remains constant

Statement D is false

Reason - because distance from axis of rotation is changing.

the angular speed will remain the same throughout the process because the ball is rotating in the same plane throughout the motion.

Statement E is false

Reason - Since moment of inertia decreases , to conserve angular momentum , angular speed increases.

4 0
3 years ago
A) A 12 kg object has a velocity of 37.5 m/s. What is its momentum?
Mkey [24]

Answer:

The answer would be 450 m kg/s

Explanation/ Explanation / Example:

Provided an object traveled 500 meters in 3 minutes , to calculate the average velocity you should take the following steps: Change minutes into seconds (so that the final result would be in meters per second). 3 minutes = 3 * 60 = 180 seconds , Divide the distance by time: velocity = 500 / 180 = 2.77 m/s .

If this doesn't help let me know!

4 0
3 years ago
To play ice hockey, each player needs ________. skates rollerblades crosses sunglasses
ipn [44]

Answer:

skates

Explanation:

Ice hockey is considered to be an extremely tough sport in which there are twelve players who fights over small 3" puck which can be launched like a missile. If one plays ice hockey he should must have necessary equipment to support his sport. These equipment include Ice Skates,Helmet with Cage and Mouth-guard:, Hockey stick, Hockey pants,Hockey gloves, shoulder pads, elbow pads, Shin Guard:Neck guard and Jockstrap (men) or Pelvic protector (women).

<em>Here we can see that correct choice is ice skate which is important for supporting player's ankles while playing ice hockey.</em>

<em></em>

Hope it helps!

6 0
3 years ago
As the temperature of an object increases, the wavelength of the brightest light emitted _______
alexira [117]

Answer:

option (B) decreases

Explanation:

According to the Wein's displacement law, the minimum wavelength of the radiated emission is inversely proportional to the absolute temperature of the body which emits radiation.

\lambda_{m}\alpha \frac{1}{T}

Where, T is the absolute temperature of the body and λm is the minimum wavelength of heat radiated.

Here, as the temperature increases, the wavelength decreases.

4 0
4 years ago
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