_____ indicate, by letter, the epcific volume-versus-temperature

Answer:

It will need 20 Watts power to move the box 5 meters in 5 seconds.

Step-by-step explanation:

The power is defined as the work per unit time or the rate of doing work:

W=dL/dt

Where de work L, can be calculated by multiplying the force by the displacement d:

L=F.d

To this example, F and D are known, therefore the work is:

L=20N . 5m=40 Nm

We know that the work is doing within a time of 5 seconds:

W= 40 Nm / 5s = 20 Nm/s = 20 Watts

Hello,

A roller coaster is moving 10 m/s and a mass of 7 kg. The roller coaster has kinetic  energy.

✔ We have : Ek = 1/2m x v²; with Ek in J, m in kg and v in m/s

Answer:

No.

Explanation:

A feather is less dense and thus less force exerted while a rock is very dense thus exerting more force .

The student should apply a 17V potential differential across the 0.7 mm piece.

The potential difference between places A and B is defined as the change in potential energy (PE) of a charge (q) transported from A to B, divided by the charge (V = VB - VA).

The joules per coulomb, sometimes known as volts (V) in honor of Alessandro Volta, are the units of potential difference.

The change in potential energy (PE) of a charge (q) transported from point A to point B, divided by the charge, is thus used to determine the potential difference between points A and B as V = VB - VA.

Volt is the SI unit for electrical potential. V stands for it.

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Answer:

D)

Explanation:

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Brainliest pls ❤️

Answer:

A

Explanation:

virtual images can be either upright or inverted

A renewable resource, also known as a flow resource, is a resource that gets replenished naturally to replace the portion depleted by usage and consumption.

Examples: solar energy, tidal energy, wind energy, hydro power, bio-energy etc.

A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a pace equal to keep up with consumption rate.

Examples: fossil fuels, natural gas, nuclear energy, natural gas etc

Answer:

Explanation:

Given:

P = 12 W

R = 270 Ω

t = 2.5 s

____________

Q - ?

Power:

P = I²·R

Current strength:

I = √ (P / R) = √ (12 / 270) ≈ 0.21 A

Charge:

Q = I·t = 0.21·2.5 = 0,525 C

Electrical energy which is provided to the pump is transformed into gravitational potential energy and into sound in equal portions. Thus, the correct option is C.

The principle of conservation of energy establishes that the energy cannot be created nor it can be lost alone. Energy can only be transformed, based on the principle of conservation of energy, the mechanical energy of the system is established as formed by the kinetic energy and the different in potential energies.

In this case, the electrical energy of the system is transformed into kinetic energy to raise the water temperature, when it reaches a height level where its actual speed is zero, all the mechanical energy is transformed into gravitational potential energy.

Therefore, the correct option is C.

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Your question is incomplete, most probably the complete question is:

Ahmad uses an electric pump to raise water to a reservoir on his farm. The pump is very noisy, and Ahmad’s uncle, who is an engineer, told him that only 50\%50%50, percent of the energy it consumes is delivered as gravitational potential energy to the water. When Ahmad turns off the pump, he notices that when he touches it, it has not warmed up.

What happened to the electrical energy provided to the pump?

a. It mostly transformed into gravitational potential energy, and a small portion transformed into sound.

b. It mostly transformed into sound, and a small portion transformed into gravitational potential energy.

c. It transformed into gravitational potential energy and into sound in equal portions.

d. It mostly transformed into sound energy and gravitational potential energy, and a small portion disappeared.

The velocity of the big fish after eating the little fish is 7.75 m/s (to the right).

Mass of the big fish = 8 kg, Velocity of the big fish = 3 m/s, Mass of the small fish = 3 kg, Velocity of the small fish = 1 m/s.

Velocity is a vector quantity and its unit is m/s. In this case, since the velocity of the big fish is towards the right, we take it as positive. Similarly, since the velocity of the small fish is towards the big fish, we take it as negative. We can find the momentum of both the fishes using the formula:

p = mv

Where p is the momentum, m is the mass and v is the velocity.Let us first find the momentum of the big fish:

p₁ = m₁v₁ = 8 × 3 = 24 kg m/s.

The momentum of the small fish:

p₂ = m₂v₂ = -3 × 1 = -3 kg m/s (the negative sign is used because the velocity is in the opposite direction of the big fish)

After the big fish eats the small fish, the mass of the big fish will be:

m₁' = m₁ + m₂ = 8 + 3 = 11 kg

Similarly, the velocity of the big fish after eating the small fish will be:

v₁' = (m₁v₁ + m₂v₂) / (m₁ + m₂)= (24 - 3) / 11 = 21 / 11 = 1.91 m/s (to the right)

Again, using the formula:

p₁' = m₁'v₁'

we can find the momentum of the big fish after eating the small fish:

p₁' = m₁'v₁' = 11 × 1.91 = 21.01 kg m/s

Finally, we can find the velocity of the big fish using the formula:

v₁' = p₁' / m₁'v₁' = 21.01 / 11 = 1.91 m/s (to the right)

Therefore, the velocity of the big fish after eating the little fish is 7.75 m/s (to the right).

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Answer:

So you maybe don't fall, have something fall on you, and for a bunch of different reasons. EARFQUAKES are really dangrous.

Explanation:

Hope this helps you!

Answer:

Weight of the pile of boxes as I think

Answer:

B

Explanation:

because. it reduces the distance between the earth

In a problem using energy considerations to solve for the speed of a ball thrown from the top of a building when it strikes the ground below, the potential energy should have its zero value at the ground level.

Based on the law of conservation of energy, the sum of potential energy and kinetic energy is constant. When a ball is thrown from the top of a building, it initially has potential energy due to its position with respect to the ground. As the ball falls, its potential energy is converted into kinetic energy because of the force of gravity.

When the ball hits the ground, it has zero potential energy and all of its initial potential energy has been converted to kinetic energy. Therefore, to solve for the speed of the ball, we can set the initial potential energy to zero at the ground level and use the law of conservation of energy to equate the initial potential energy to the final kinetic energy.

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Answer:

E) The rod remains uncharted.

Explanation:

The negatively charges rod has an excess of electrons. These electrons repel each other, so when this rod touches the horizontal uncharged insulating rod, they will try to go to the uncharge rod. However, this is an insulating rod, so there will be no transfer of electrons. It means that the rod remains uncharted.

Answer:

The medium sound waves

Explanation:

change in the direction of a wave passing from one medium to another.

Answer:

c. may be accompanied by the sound of explosively expanding hot air, called thunder.

Explanation:

Lightning is a discharge which is due to the reaction between oppositely charged charges in the clouds, or between clouds base and the Earth surface.

The motion of the cloud causes charging of clouds by friction, thus the reaction between opposite charges (jumping of charges from one cloud to another) in the cloud can lead to lightning. Also, oftentimes the bottom of a cloud is negatively charged so that this is attracted to the positive charge on the earth surface. Thus leading to a discharge called lightning.

Thus in the given question, the appropriate option is C. This implies that, lightning may be accompanied by the sound of explosively expanding hot air, called thunder.

PLS HELP ME AS QUICK AS POSSIBLE,

THANKS :)) I'm a bit confused

Can you answer 1 and 2, then confirm 3 :))))

The pressure exerted by the water at the bottom of the well is 170000 Pa.

We can use the formula for pressure due to a liquid:

pressure = density × gravity × height

where;

Assuming the density of water is 1000 kg/m³ and the acceleration due to gravity is 9.81 m/s², we can calculate the pressure at the bottom of the well as:

pressure = 1000 kg/m³ × 9.81 m/s² × 17 m

pressure = 166970 Pa

Rounding off to two significant figures, the pressure exerted by the water at the bottom of the well is 170000 Pa.

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If a rocket takes off from Earth with a certain force, there are several things that must be true about Earth to make this possible.

Firstly, Earth must have a gravitational field that attracts the rocket toward its center. This gravitational force pulls the rocket toward the ground, and the rocket must overcome it with a force greater than the force of gravity in order to take off.

Secondly, Earth's atmosphere must be present, as the rocket needs to push against the air molecules to create thrust and lift off the ground. Thirdly, Earth's surface must be firm enough to support the launch of the rocket, with a strong and stable launchpad to prevent any accidents.

Fourthly, Earth's rotational speed and position in its orbit around the Sun must also be taken into account, as this affects the required trajectory of the rocket for a successful launch. Overall, a combination of Earth's gravitational force, atmosphere, surface conditions, and position in its orbit all play a crucial role in enabling a rocket to take off from Earth.

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Answer:

208 Joules

Explanation:

The radius of the circular path the charge moves, r = 26 m

The magnetic force acting on the charge particle, F = 16 N

Centripetal force, \(F_c\) = m·v²/r

Kinetic energy, K.E. = (1/2)·m·v²

Where;

m = The mass of the charged particle

v = The velocity of the charged particle

r = The radius of the path of the charged particle

Whereby the magnetic force acting on the charge particle = The centripetal force, we have;

F = \(F_c\) = m·v²/r = 16 N

(1/2) × r × \(F_c\) = (1/2) × r × m·v²/r = (1/2)·m·v² = K.E.

∴ (1/2) × r × \(F_c\) = (1/2) × 26 m × 16 N =  = (1/2)·m·v² = K.E.

∴ 208 Joules = K.E.

The kinetic energy of an particle moving in the circular path, K.E. = 208 Joules.

Answer:

The ball will continue to travel at 18 m/s horizontally

When the ball hits the ground it will have a horizontal component equal to that of the car window (it continues to move at 18 m/s horizontally)

The adopting family that Leilani lived with can be classified as a "fictive kin" family, creating a social bond that mimics biological relationships and provides support similar to biological parents.

Sociologists would classify the adopting family that Leilani lived with as a "fictive kin" family. Fictive kinship refers to a social bond between individuals that mimics the biological relationships of kinship. In this case, the adopting family took on the role of Leilani's parents, providing her with emotional, social, and financial support just like biological parents would.

Fictive kinship is common in many cultures, and it can be formed through a variety of mechanisms such as adoption, godparenting, or even close friendships. The purpose of fictive kinship is to create a sense of belonging and connection within a community, and it often plays a crucial role in providing support to individuals who have lost their biological family members.

In the case of Leilani, the adopting family fulfilled the role of parents, providing her with love and care for the majority of her childhood. While they may not have been biologically related, the bond they formed with Leilani was just as strong as if they were. Thus, sociologists would classify the adopting family as a fictive kin family, demonstrating the importance of these non-biological family structures in society.

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Could someone help me? A cannon is fired with an initial horizontal velocity of 20 m/s and initial vertical velocity of 25 m/s . After 3s in the air, the canon hits its target. How far away was the canon from its target?

A high jumper leaves the ground with an initial velocity of 10 m/s rightward at an angle of 15 degrees . What is the high jumper's initial horizontal velocity?

Answer:

1.6 m/s?

Explanation:

80 ÷ 50 = 1.6 m/s

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The solution for any unitary operator can be expressed as iA.

To prove that any unitary operator U can be expressed as iA, where  is Hermition, we will use the spectral theorem.

What is the Spectral Theorem?The spectral theorem is a fundamental theorem in linear algebra that gives conditions under which a linear operator is diagonalizable. In the finite-dimensional case, it states that a symmetric matrix can be diagonalized by an orthogonal matrix.

In the infinite-dimensional case, the theorem deals with self-adjoint linear operators and continuous functions on their spectrum.

Let U be a unitary operator. Then U is invertible and satisfies U†U = UU† = I, where U† is the adjoint of U.

Since U is invertible, we can write U as U = e^B, where B is some Hermitian operator.

Since U is unitary, we have UU†

= e^BB†e^-B

= Ie^BBe^-B

= Ie^0

= Iand U†U

= e^-BB†e^B

= Ie^-BBe^B

= Ie^0

= I.Therefore, B satisfies the relations BB† = B†B = I.

This means that B is normal and can be diagonalized by a unitary matrix U:U†BU = D,where D is a diagonal matrix whose entries are the eigenvalues of B.

Then we have U†e^BUU†

= U†Ue^BUU†

= e^BUU†

= e^DU†,so we have expressed U as e^B = Ue^DU†, which is of the form iÂ, where  is Hermitian.

Therefore, any unitary operator U can be expressed as iA, where  is Hermitian, and the proof is complete.

Therefore, any unitary operator U can be expressed as iA, where  is Hermitian.

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