What does temperature measure?a. the amount of disorder in a substance
b. the average kinetic energy of molecules
c. the average potential energy of molecules
d. the direction of the moving molecules in a substance
Answers
Final answer:
Temperature measures the average kinetic energy of molecules in a substance.
Explanation:
The correct answer is b. the average kinetic energy of molecules.
Temperature measures the average kinetic energy of molecules in a substance. When the temperature of a substance increases, the molecules move faster and have more kinetic energy. This is why substances generally expand when heated and contract when cooled.
For example, when you heat water, the temperature increases, and the water molecules move faster, eventually reaching a boiling point where they have enough kinetic energy to break the bonds and escape as steam.
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Related Questions
Currently, Earth's tilt is closest to _____.A. 0°B. 14.5°C. 23.5°D. none of these because, Earth's tilt changes dramatically with each orbit
How does molecules move in Hot and cold air?
A soccer ball is traveling at a velocity of 50 m/s. The kinetic energy of the ball is 500 J. What is the mass of the soccer ball?
Minerals mined for titanium are
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Answer: He is the lead singer of queen with Brian may (guitarist) John Deacon(bassist) and Roger Taylor(drummer). Before being known as queen they were called Smile
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The required component of vector is 7√2/2 unit.
What is unit vector?
Physical quantities that exhibit both magnitude and direction are referred to as vector quantities. As an illustration, consider displacement, force, torque, momentum, acceleration, and velocity.
Typically, an arrow is used on top of a vector quantity to depict the vector value of the velocity and to clarify that the quantity has both magnitude and direction.
A quantity with both magnitude and direction is referred to as a vector. A unit vector is one with a magnitude of 1. It also goes by the name Direction Vector.
Given vector is :
.
and the other vector is :
.
The unit vector along is
Hence, component of A vector along B vector is =
=
= (3+4)/√2
= 7/√2
= 7√2/2 unit.
So, the required component of vector is 7√2/2 unit.
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a^2 = b^2 + c^2
when a is the hypotenuse, and b and c are opposites and adjacent in a right triangle
3^2 + 4^2 = 5^2
Therefore, the hypotenuse has a magnitude of 5
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Final answer:
The question is related to Physics and deals with kinematic equations. With the supplied information, one can calculate elements such as velocity or applied force in the jump.
Explanation:
The subject of the question pertains to the field of Physics, specifically the area of kinematic equations which deal with the motion of objects. The provided information in the question pertains to the rise of a person's body during a jump. Given the average height of 60cm that a person typically attains and the approximate rise of the body from the knees up being 50cm, these figures can be used in a Physics context to determine different factors of the jump such as velocity or force applied.
For example, using the equation of motion (height = 0.5 * gravity * time^2) where gravity is around 9.8 m/s^2, you can calculate the time taken to reach maximum height. We can calculate this using the initial velocity combined with the gravity force. Furthermore, the force applied can be calculated knowing the mass of the person and the acceleration (which is the initial velocity divided by the time).
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B. You build a tall sand castle at the beach. After wave washes it over, the sand castle turns into a big pile of sand
C. Boiling water turns a raw egg into a hard boiled egg
D. Max divided cookie dough into small pieces on a cookie sheet.
E. A loaf of freshly baked bread tastes better and looks much different than a lump of bread dough
F. A glass of water is left in the Sun. In the time, the water evaporates leaving the glass empty.
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B.physical change, there is no new substance made and the effect can be undone
C.chemical change, the effect cannot be undone
D.physical change, the effect can be undone
E.chemical change, a new substance is made and the effect cannot be undone
F.physical change, there is no new substance and the effect can be reversed
hope this helps :)
b. 1.875 kg
c. 23 kg
d. 120 N
Answers
F =MxA =15x8 =120
Answer:
120 N
Explanation:
p =mv p = 15 kg*8m/s2 = 120N
B. The frequency of infrasonic vibrations is much too high to be heard by humans.
C. Ultrasonic vibrations have a frequency lower than the range for normal hearing.
D. Infrasonic vibrations are used in sonar equipment as well as to detect flaws in steel castings.
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Infrasonic and ultrasonic vibrations can’t be heard by humans because they’re outside of the range of frequencies that can be detected. Infrasonic vibrations have a lower frequency than can be heard by the human ear; ultrasonic vibrations have a higher frequency than can be heard by the human ear. Infrasonic vibrations can be felt if the amplitude is great enough. Ultrasonic vibrations are utilized in sonar equipment and in applications to detect flaws in steel castings and to remove grease or foreign material from machine-part surfaces.