each second, a nuclear power plant generates 2100 mj of heat energy from nuclear reactions in the reactor's core. this energy is used to boil water and produce high-pressure steam at 390 ∘c. the steam spins a turbine, which produces 700 mw of electric power, then the steam is condensed and the water is cooled to 40 ∘c before starting the cycle again. what is the plant's actual efficiency?

The resistance of a circuit that contains two 50.0 Ω resistors connected in series with a 12.0 V battery is 100 Ω. The resistance of the circuit is equal to the sum of the individual resistors when they are connected in series.

In this case, two 50.0 Ω resistors are connected in series, resulting in a total resistance of 100 Ω. Resistance can be defined as the obstruction that electricity faces when it travels through a conductor. The greater the resistance, the less current is allowed to flow through the circuit. The following equation is used to calculate resistance: R = V / IWhere R is resistance, V is voltage, and I is current.

Resistance can also be calculated using Ohm's Law if we know the values of voltage and current. When resistors are connected in series, the total resistance of the circuit is equal to the sum of the individual resistors. This is expressed by the following equation:RT = R1 + R2 + ... + RNWhere RT is the total resistance of the circuit, and R1, R2, and RN are the individual resistors. In this case, the circuit contains two 50.0 Ω resistors connected in series.

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Answer: Yes. Please find the answer in the explanation.

Explanation:

Yes. Since velocity is a vector quantity, that is, it has both magnitude and direction.

If the displacements covered are not of the same direction, the velocity will not also of the same direction.

Take for instance, if the velocity in a positive is 40 m/s and velocity in the opposite direction is - 20 m/s . Then, the resultant velocity will be 40 - 20 = 20 m/s

Therefore,  it is possible that at any time during their trip their velocity was -20 m/s.

Answer:

the answer is 600/5 km/h

The slope of a line is also referred to as the gradient and it is the number which describes both the direction and the steepness of the line.

This type of formula is used to calculate how steep a line is and is usually denoted as m. The formula can be seen below:

m = y2-y1 / x2-x1

Slope can be defined as the ratio of the vertical change between two points to the horizontal change between two points and measures the steepness of a line.

The chosen answers provided are therefore the most appropriate in this context.

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Answer:

The right solution is "5.38 grams".

Explanation:

The given values are:

Heat of fusion,

L = 80 cal/g

Mass of ice cube,

\(m_{ice} = 41 \ g\)

Specific heat of ice,

\(C_{ice}=0.5 \ cal/g\)

Let,

Gram of water freezes will be "m".

⇒  \(mL=m_{ice} C_{ice} (0+21)\)

Or,

⇒     \(m=\frac{m_{ice} C_{ice} (0+21)}{L}\)

On substituting the values, we get

⇒         \(=\frac{41\times 0.5\times 21}{80}\)

⇒         \(=\frac{430.5}{80}\)

⇒         \(=5.38 \ grams\)

Answer:405

Explanation:Multiply 45x9.0=405

Answer:

405 Hz

Explanation:

Give the person on top Brainly

Answer:

The change that has to take place inside the power cord in order for the device to function properly include;

The changing of the alternating current (AC) from the electrical outlet to the direct current having a specific voltage and current value with which the device can be powered

Explanation:

A battery powered device makes use of direct current (DC) electric power from a battery, while the power normally given out at an electrical outlet comes as an alternating current (AC) electric power source.

The power cord for battery-powered device, also known as an AC/DC adapter, that allows them to be plugged into electrical outlets converts the AC electric current it obtains from the electrical outlets to DC electrical current of the appropriate voltage and amperage that the device can make use of for electric power to function and for charging the battery which is the power source for the device

Therefore, the change that has to take place in the power cord is the conversion of the electric outlet alternating current (AC) voltage and amperage values, into direct current (DC) of the required voltage and current for the device

Answer:

D. The acceleration is downward at all points in the motion

Explanation:

:D

Hi there!

\(\large\boxed{d = 162.5m}\)

Find the distance traveled using the kinematic equation:

d = vi(t) + 1/2(a)(t²)

In this instance, vi = 0 because the object was initially at rest. Plug in the other values to solve:

d = 0t + 1/2(13)(5²)

d = 1/2(13)(25)

d = 162.5m

Answer:

R= v/I

R= 9/1.05=8.5714 ohms

The minimum required power input for the refrigerator is 20.4 W.

The minimum required power input for the refrigerator can be calculated using the formula: P = Q/t, where P is the power input, Q is the heat removed from the refrigerated space, and t is the time taken to remove that heat.

First, we need to calculate the heat removed by the refrigerator, which can be found using the formula: Q = m*c*(T2-T1), where m is the mass of the refrigerated space, c is the specific heat capacity of the substance being refrigerated, T2 is the initial temperature (-17 °C), and T1 is the final temperature (26 °C).

Assuming a mass of 1 kg and a specific heat capacity of 2.5 J/g°C for the substance being refrigerated, the heat removed is 1575 J.

Dividing this by the rate of heat removal (13.6 J/s) gives us the time taken (115.8 seconds).

Finally, plugging in the values, we get the minimum required power input of 20.4 W.

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The minimum required power input for the refrigerator is 20.4 W.

The minimum required power input for the refrigerator can be calculated using the formula: P = Q/t, where P is the power input, Q is the heat removed from the refrigerated space, and t is the time taken to remove that heat.

First, we need to calculate the heat removed by the refrigerator, which can be found using the formula: Q = m*c*(T2-T1), where m is the mass of the refrigerated space, c is the specific heat capacity of the substance being refrigerated, T2 is the initial temperature (-17 °C), and T1 is the final temperature (26 °C).

Assuming a mass of 1 kg and a specific heat capacity of 2.5 J/g°C for the substance being refrigerated, the heat removed is 1575 J.

Dividing this by the rate of heat removal (13.6 J/s) gives us the time taken (115.8 seconds).

Finally, plugging in the values, we get the minimum required power input of 20.4 W.

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Hubble space telescope, Hubble deep field guide, moon, mercury, Saturn, sun, galaxy messier 101

Answer:

1-Hubble Deep Field Galaxy

2-Galaxy Messier 101

3-Sun

4-Saturn

5-Mercury

6-Moon

7-Hubble Space Telescope

An ICE table can be used to calculate the pH of a solution. The ICE table is an acronym for Initial, Change, and Equilibrium concentrations is 1.2× 10⁻³.

An acronym is a word or name formed as an abbreviation from the initial components of a phrase or a word. It is pronounced as a word, rather than letter by letter. Acronyms are often created using the first letter of each word in a phrase to form a new word. Examples of acronyms include NASA (National Aeronautics and Space Administration), OPEC (Organization of Petroleum Exporting Countries), and ASAP (as soon as possible). The use of acronyms is common in both speech and writing and can be used to shorten the length of long phrases or words.

Acetic Acid (HA): 0.100 - x,Sodium Acetate (NaA): 0.100 + x,The equilibrium equation for this reaction is:HA + NaA ⇌ H2A + Na+,The equilibrium constant (K) is: K = [H2A][Na⁺] / [HA][NaA],Substituting the equilibrium concentrations into the equation, we get:

K = (x)(x) / [(0.100 - x)(0.100 + x)],Rearranging, we get:x2 = (1.8 × 10⁻⁵)(0.1002),Solving for x, we get:x = 1.2× 10⁻³

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Answer:

The answer is never

Explanation:

If 2 balanced forces are pushing on it then the speed will not change

The change in the momentum of the balls is -8 kg.m/s.

The initial momentum of the balls is calculated as follows;

Pi = 4 kg(4 m/s) + 2 kg(2 m/s)

Pi = 20 kg.m/s

Pf = 2 m/s (4 kg + 2 kg)

Pf = 2 m/s (6 kg)

Pf = 12 kg.m/s

ΔP = Pf - Pi

ΔP = 12 kg.m/s - 20 kg.m/s

ΔP = -8 kg.m/s

Thus, the change in the momentum of the balls is -8 kg.m/s.

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The complete question is below:

What is is the change in momentum of the balls?

Answer:

Please find the answer in the explanation.

Explanation:

Given that the actual speed of the car at the top of the hill is 20.0m/s. What is the reason for this difference in velocity?

Speed is a scalar quantity that is, it has only magnitude but no direction.

While velocity is a vector quantity, that is, it has both magnitude and direction.

If the actual speed of a car is 20 m/s, that is the magnitude of the speed only without direction.

The velocity will therefore be of the same magnitude but with addition of direction. Either west, east or north south.

Answer:

20m/s due east

Explanation:

Given parameters:

Displacement eastward  = 200m

Time  = 10s

Unknown:

Velocity  = ?

Solution:

Velocity is the displacement divided by time;

    Velocity  = \(\frac{displacement}{time}\)  

 Velocity  = \(\frac{200}{10}\)    = 20m/s due east

Answer:

Explanation:  

When objects collide, energy can be transferred from one object to another, thereby changing their motion. In such collisions, some energy is typically also transferred to the surrounding air; as a result, the air gets heated and sound is produced.

An isolated system is completely isolated from its surroundings and no transfer of energy or mass is possible between the system and surroundings.

The law of conservation of energy or the first law of thermodynamics states that the energy can neither be created nor be destroyed, but it can be transformed from one form to another. In other words, the total energy of an isolated system is always conserved.

For example, when you are driving a car or a motorcycle, the chemical energy that was stored either in the fuel or in the battery is getting converted into mechanical energy. Similarly, when an explosion happens, the chemical energy of the fuel is converted into light energy and heat energy.

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Answer: The number of neutrons

Explanation: trust me bro

Some chlorine atoms have an atomic mass of 37, while others have an

the atomic mass of 35.the difference between the two types of chlorine

atom is The number of neutrons, therefore the correct answer is option C

The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.

While the atomic mass of an atom is the sum of the total number of protons and the number of neutrons present inside of any atom.

Since there are chlorine atoms with an atomic mass of 37 and those with an atomic mass of 35. Option C is the appropriate response because the number of neutrons distinguishes between the two varieties of chlorine atoms.

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The star is moving away from Earth at a velocity of 1.8 x 106 m/s.

The Doppler Effect describes the shift in wavelength of a wave when the source is moving in relation to the observer. The shift can be observed in sound waves, light waves, and other waves.

The Doppler Effect can be used to determine the velocity of objects moving away from an observer, as in the case of stars moving away from Earth.

The velocity of a star moving away from Earth can be determined using the equation:

v = Δλ/λ x c, Where v is the velocity of the star, Δλ is the shift in wavelength of the spectral line, λ is the wavelength of the spectral line measured in the lab on Earth, and c is the speed of light (3.00 x 108 m/s).

In this case, the shift in wavelength of the spectral line is Δλ = 500.3 nm - 500 nm = 0.3 nm.

The wavelength of the spectral line measured in the lab on Earth is λ = 500 nm.

Plugging in these values to the equation above: v = Δλ/λ x cv = (0.3 nm / 500 nm) x (3.00 x 108 m/s) = 1.8 x 106 m/s.

Therefore, velocity of star 1.8 x 106 m/s.

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(a) The charge of the ion is determined as 2.76 x 10⁻¹³C.

(b) The potential difference between the oil droplet’s starting point and end point is 16.28 V.

The charge of the ion is calculated as follows;

W = Fdsinθ

F = W/dsinθ

F = (3.9 × 10⁻¹²)/(0.022 x sin120)

F = 2.046 x 10⁻¹⁰ N

E = F/q

q = F/E

q = (2.046 x 10⁻¹⁰)/(740)

q = 2.76 x 10⁻¹³C

E = V/d

V = Ed

V = 740 x 0.022

V = 16.28 V

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An interior designer is choosing a paint color for a room and has two samples that are both blue, however one blue is described as brighter than the other. Both would have the same wavelength but would differ due to the amplitude property of light.

It is the amplitude of light which makes one sample brighter than other.

The amplitude plays an important part in differentiating the same colors of the same wavelength. It tells us about the brightness or intensity of a certain light wave as compared to others of the same wavelength. So, whenever two same colors look different due to brightness, it is due to the amplitude property of the light.

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Answer:

I dont know what you mena by road and the people

(i) Switch k1 is closed:

The current passing through the circuit is:  0.25 amps

R_total = R1 + R2 = 3 + 5 = 8 ohms

The current passing through the circuit is:

i = V / R_total = 2 / 8 = 0.25 amps

(ii) Switches k1 and k2 are closed:

The current passing through the circuit is: 1.07 amps

1/R_total = 1/R1 + 1/(R2 + R3) = 1/3 + 1/(5 + 0) = 8/15

R_total = 15/8 ohms

The current passing through the circuit is:

i = V / R_total = 2 / (15/8) = 1.07 amps

(iii) Switch k1 is open and k2 is closed:

The current passing through the circuit is: 1.07 amps

1/R_total = 1/R2 + 1/(R1 + R3) = 1/5 + 1/(3 + 0) = 1/5 + 1/3 = 8/15

R_total = 15/8 ohms

The current passing through the circuit is:

i = V / R_total = 2 / (15/8) = 1.07 amps

So the current passing through the circuit depends on which switches are closed, and can range from 0.25 amps to 1.07 amps.

What is current?

Crrent refers to the flow of electric charge through a conductor, such as a wire. It is measured in amperes (A) and is defined as the rate at which electric charge flows past a given point in a circuit. current is caused by the movement of charged particles, such as electrons or ions, through a conductor.

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Answer: = 25. 5 m

Explanation:

Solve for C using Pythagorean theorem:

1. \(\sqrt{a^{2}+b^{2} }=c\)

2.  \(\sqrt{22.2 m ^{2} +12.6m^{2} } =c\)

3. \(25.52646 m= c\)

∴ Magnitude of the vector is 25.5 m

Answer:

Usually when climbing, it's best to be in the small front ring and the largest back ring. If your cadence is about 100 rpm, then whatever gear you're in is fine. It depends on the road, but as long as your pedaling is at a level you're comfortable with, you're fine.

Explanation:

Google answer by the way.

Answer:

F = 20 N

Explanation:

Given:

m = 0.12 kg

H = 2.3 m

S = 0.067 m

g = 9.8 m/s²

____________

F - ?

1)

Potential energy over grass:

Wp = m*g*H = 0.12*9.8*2.3 ≈ 2.7 J

2)

Work against the friction force of the grass:

A = F₁*S

3)

According to the law of conservation of energy:

A = Wp

F₁*S = Wp

F₁ = Wp / S = 2.7 / 0.067 ≈ 40 N

4)

Average grass resistance strength:

F = F₁ / 2 = 40 / 2 = 20 N