In the diagram, what is happening to the temperature at Point B? Question 6 options: A. The temperature is rising as the molecules break apart from each other B. The temperature is not rising because the heat is being used to break the connections between the molecules C. The temperature is dropping as the molecules break apart from each other D. The temperature is rising as the substance melts E. The temperature is not rising because the molecules are slowing down
Answers
Answer: The correct answer is option D.
Explanation:
At point B, the temperature becomes constant which means that energy given to the substance is getting used in to the breaking of forces which are present in between the molecules of the substance. These forces are known as inter-molecular forces. Or we can also say that ,at point B the state of the substance is changing.
Hence, the correct answer is option D.
Related Questions
Displacement vectors A, B, and C add up to a total of zero. Vector A has a magnitude of 1550 m and a direction of 25.6° north of east. Vector B has a direction of 41.0° east of south, and vector C has a direction of 35.1° north of west. Find the magnitudes of vector B and vector C.
What is the charge of fluorine if it gains 1 electron
10. Which of the following statements is accurate?A. Sound waves passing through the air will do so as transverse waves, which vibrate vertically and still retain their horizontal positions. B. Compressions and rarefactions occur throughout a transverse wave. C. The wavelength of both traverse and longitudinal waves is measured parallel to the direction of the travel of the wave. D. Amplitude of longitudinal waves is measured at right angles to the direction of the travel of the wave and represents the maximum distance the molecule has moved from its normal position.
Which one of the following SI base units is not matched to the correct unit of measurement? A. Mass: kg B. Time: s C. Length: km D. Temperature: K
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Answer:
In cold air, the molecules mover slower because of the colder tempature, however, in hot air they move faster this is because the molecules are being heated up. Hot = faster, cold = slower
Explanation:
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Answer:
A.) 3.975 m/s
B.) 0.925 m/s
Explanation:
Given that a person walks first at a constant speed of 4.90 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.05 m/s.
A) What is her average speed over the entire trip?
The average speed = (4.90 + 3.05)/2
Average speed = 7.95/2
Average speed = 3.975 m/s
B) What is her average velocity over the entire trip?
Since velocity is a vector quantity, that is, we consider both the magnitude and direction
Average velocity = ( 4.90 - 3.05)/2
Average velocity = 1.85/2
Average velocity = 0.925 m/s
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Answer:
Efficiency = 90 %
Wasted energy = 10 %
Explanation:
Since we have the input energy and useful output energy of the electric kettle, the only thing we are required to calculate here is its efficiency. This is gotten from
E = useful output energy/input energy × 100
E = 9/10 × 100 = 90 %
The percentage of wasted energy is
W = wasted energy/input energy × 100
W = 1/10 × 100
W = 10 %
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1 pascal = 1 newton / 1 square meter
So a pascal is an acceptable unit of pressure, and the statement
is true. It's very popular worldwide for this purpose, but it's by no
means the only one used everywhere. We also still see measurements
in units of pounds per square inch, Torr, millibars, atmospheres, etc.
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Properties of wire, and things you can
do to it to make its resistance high:
-- Thickness. Make it as thin as a hair on a mosquito's leg.
-- Length. Make it long enough to go around the Earth.
-- Resistivity of the material. Make the wire out of glass or wood.
I tried 3(-9.8m/s2) and some other formula's but could never arrive at the correct answer of 24.7m/s. Could someone explain how to arrive at this answer and the reasoning behind it?
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-- You kick it horizontally, out off of the cliff, at 15 m/s. There's no horizontal
force on it, so its horizontal speed never changes.
-- As soon as it clears the edge of the cliff, gravity starts accelerating it
downward, 9.8 m/s faster every second. After 2 seconds, it has
(2 x 9.8) = 19.6 m/s
of downward vertical speed.
At this point, its velocity points somewhere between horizontal and downward-
vertical. I gather from the wording of the question that you're not so much
concerned with the direction of the velocity as you are with its magnitude ...
that is, the stone's speed in whatever direction it's actually moving.
You have a vector with two components: 15 horizontal and 19.6 vertical.
Those components are perpendicular, so their resultant is just the hypotenuse
of the right triangle.
(Speed)² = (15 m/s)² + (19.6 m/s)²
= (225 m²/s²) + (384.16 m²/s²)
= (609.16 m²/s²) .
Speed = √(609.16 m²/s²) = 24.681 m/s
That's where the 24.7 m/s comes from. /\
(I just looked back at the question again. Notice that we don't care
how high the cliff is. That "44m" is in there only to distract those who
don't know what they're doing, and who think that they must use it
just because it's there.)
the y velocity is 19.62 after 2 seconds because of acceleration of 9.81 m/s x 2
the velocity can be found by making a diagram and solving through the pythagorean theorem
15 sq + 19.62 sq = velocity sq
225 + 384.9444 = velocity sq
velocity = sqrt 609.944
velocity = 24.7