PHYSICS MIDDLE SCHOOL

The KE of a body becomes 2 times of its original value then the new momentum will be more than its initial momentum by

Answers

Answer 1

Answer:

Answer:

√2

Explanation:

If the final kinetic energy is 2 times the initial kinetic energy:

KE = 2 KE₀

½ mv² = 2 (½ mv₀²)

v² = 2 v₀²

v = √2 v₀

Therefore, the ratio of the final momentum to the initial momentum is:

p / p₀

mv / (mv₀)

v / v₀

√2

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A circuit has a known resistance of 5 Ohms. An ammeter in the circuit gives a reading of 5 Amps. What is the Voltage of the circuit?

Answers

E = I R

Voltage = (current)×(resistance).

V = 5A x 5 ohms = 25 volts.

A teacher listed the following two processes.• Process 1: water changing to ice in a refrigerator
• Process 2: steam coming out of a kettle filled with hot of water

Which table correctly identifies the change of state taking place in each example?
A)
Process Phase Change
1 Liquid to gas
2 Liquid to gas
B)
Process Phase Change
1 Liquid to gas
2 Liquid to solid
C)
Process Phase Change
1 Liquid to gas
2 Gas to Liquid
D)
Process Phase Change
1 Liquid to solid
2 Liquid to gas

Answers

The answer is D because water changing to ice is liquid to solid and water turning to gas is liquid to gas.

so we know that water is a liquid, ice is a solid (block) and steam is a gas. With this information, change out the process and see which is true (I will check your answer if you comment below)

What has more thermal energy a small balloon or a large balloon

Answers

Answer:

large balloon

Explanation:

Thermal energy is the amount of energy contained in a system solely by the effect of its temperature. However, this concept should not be confused with that of internal energy. Internal energy, in turn, is defined as the sum of kinetic energy (translational, rotational and vibrational) with the different forms of potential energy (attractive or repulsive) that can exist between the molecules of a body.

Kinetic energy is associated with the movement of molecules, while potential energy is energy that can be stored in a physical system. In the case of balloons filled with air or liquids, the larger the balloon, the greater the kinetic potential and consequently the thermal energy. For example, a large balloon filled with air will have more thermal energy, because it will have more air molecules that will move through the kinetic energy causing thermal energy.

The average kinetic energy of these individual particles causes an effect we can sense—warmth. ... The air in the air-filled balloon absorbed thermal energy from the flame and started moving faster. The increased movement of the molecules of air expanded the balloon and plastic of the balloon quickly melted. So the big one

How is power defined?A.the quantity of work accomplished
B.the direction of the work
C.the total distance an object is moved
D.the rate at which work is accomplished
Please Help

Answers

The correct answer to this question is D) The rate at which work is accomplished.

EXPLANATION:

Let us consider a body performs W amount of work due to the application of some external forces.

Let the body does that work during the time interval of t seconds.

Hence, the power of the body is defined as the rate of doing work or the work done per unit time. We know that energy is the capacity to do work. So, power can be defined as the rate of consumption of energy.

Mathematically power can be written as -

Power P = $(W)/(t)$ .

Hence, the correct definition of power is that the rate at which work is accomplished.

The power is the rate at which work is accomplished, option $D$ is correct.

Further Explanation:

The power is the rate of transformation energy which is used by another body.

The power is the quantity with only magnitude so it is a scalar quantity. The standard of international unit is watt, it is also written as J/s. The standard of international unit watt in honor of James Watt.

A quantity is said as a vector if it has some magnitude and direction in order to give the details regarding the quantity.

A quantity is said as a scalar if it has only the magnitude in order to give the details regarding the quantity.

Concept:

The term power is defined as “The rate at which the work is finished or the energy is transferred from one place to another or transformed into another form.”

The term energy is defined as the capacity to do work or result in some displacement by applying some force.

The expression for power is:

$\fbox{\begin\np =\frac{{\Delta w}}{{\Delta t}}\end{minispace}}$

Here, $p$ is the power, $\Delta w$ is the change in energy and $\Delta t$ is the change in the time.

Therefore, the power is the rate at which work is accomplished, option $D$ is correct.

Learn more:

1. Work and power brainly.com/question/9566221

2. Calculate power brainly.com/question/2829572

3. Energy and SI unit https://brainly.in/question/1227001

Answer Details:

Grade: Middle school

Subject: Physics

Chapter: Kinematics

Keywords:

Define, power, quantity, work, accomplished, direction, total distance, object, moved, rate, option, D.

Who is the silentest that revised the atomic modle

Answers

Bohr is the scientist you are looking for my friend...;)

Which explains whether boron or arsenic is the dopant most likely used in the semiconductor layer marked with +?

Answers

Explains whether boron or arsenic is the dopant most likely used in the semiconductor layer marked with plus, so this layer is the emitter of a PNP transistor, so it could include boron.

What is the structure of a semiconductor?

The simplest semiconductor materials are made up of atoms of a single chemical element with four valence electrons, that is, tetravalent atoms. Two atoms, tetravalent, widely used in semiconductor materials are germanium (Ge) and silicon (Si).

P-Type - In P-type doping, boron or gallium is the dopant. Gallium boron has only three electrons and each one is external. When combined" in the silicon lattice or form "holes" "gaps in the lattice and a silicon electron has nothing to bind to".

See more about semiconductors at brainly.com/question/15184439

Answer:

D) This layer is the emitter of a PNP transistor, so it could include boron.

Got it on quiz! Good luck!

Explanation:

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