in steady state, what is the total power p expended by the refrigerator and air conditioner together?

Answer:

Approx 50 atm

Explanation:

See graph below:

Answer:

Muscle memory is found in many everyday activities that become automatic and improve with practice, such as riding bicycles, driving motor vehicles, playing ball sports, typing on keyboards, entering PINs, playing musical instruments, poker, martial arts, and dancing.

Explanation:

The magnitude of the force that each wire exerts on a 1.20 mm length of the other is 5.33 * 10^-10 N.

When the current in each wire is doubled, i1i1 becomes 10.0 aa and i2i2 becomes 4.00 aa. We need to calculate the magnitude of the force that each wire exerts on a 1.20 mm length of the other.
To calculate the force, we can use the formula F = (μ₀ * i1 * i2 * L) / (2 * π * d), where μ₀ is the magnetic constant, i1 and i2 are the currents in the wires, L is the length of the wire segment, and d is the distance between the wires.
For the first wire, i1 = 10.0 aa, and for the second wire, i2 = 4.00 aa. We can assume that the wires are parallel and the distance between them is constant, so we can take d = 1.20 mm.
Plugging in the values, we get:
F = (4 * π * 10^-7 * 10.0 aa * 4.00 aa * 1.20 mm) / (2 * π * 1.20 mm)
F = 5.33 * 10^-10 N

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If the normal force of the bow on the string is 0. 75 N ,The string be pulled before it slips if the string static friction is bowed at its center is 0.60mm.

The normal force exerted by the bow on the string is the force perpendicular to the surface of contact between them. In this case, the normal force is given as 0.75 N. The string can be pulled before it slips when the applied force reaches the maximum static friction force between the string and the bow.

The maximum static friction force is determined by the coefficient of static friction (μs) between the string and the bow, multiplied by the normal force. The coefficient of static friction represents the interaction between the two surfaces and their tendency to resist relative motion. The maximum normal force force can be calculated using the equation Fmax = μs * N, where Fmax is the maximum static friction force, μs is the coefficient of static friction, and N is the normal force.

Fmax=0.8×0.75

Fmax=0.60mm

The distance to which the string can be pulled before it slips depends on the relationship between the applied force and the maximum static friction force. Once the applied force exceeds the maximum static friction force, the string will start to slip. The specific distance at which this occurs would require additional information about the coefficient of static friction and the applied force.

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Although a magnet can change the direction of travel of an electron beam, it cannot change its charge. The charge of an electron is a fundamental property and is not affected by magnetic fields.

A magnet is an object or material that produces a magnetic field, which can exert attractive or repulsive forces on other magnets or magnetic materials. It has a north pole and a south pole with opposite magnetic polarities. Magnets can be natural or artificial, and they are used in numerous applications like electric motors, generators, speakers, magnetic storage devices, and medical imaging machines. They play a crucial role in various industries and scientific fields where the manipulation of magnetic fields is necessary.

They are also commonly used in magnetic compasses for navigation and in various industrial and scientific applications where the manipulation of magnetic fields is required.

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The density of the substance is 0.4 g/mL.

The correct answer is :

                          A. 0.40 g/mL.

To determine the density of the substance, we need to divide its mass by its volume. Given that the mass is 2.0 g and the volume in the graduated cylinder increased from 70 mL to 75 mL, we can calculate the density.

The change in volume is obtained by subtracting the initial volume (70 mL) from the final volume (75 mL), resulting in a change of 5 mL. Now, we can proceed with the density calculation.

Density = Mass / Volume

Density = 2.0 g / 5 mL

Simplifying the calculation, we find that the density is 0.4 g/mL.

Therefore, the correct answer is A. 0.40 g/mL.

This means that for every milliliter of the substance, it has a mass of 0.4 grams. Density is a fundamental property of matter and helps identify and classify substances. It is often used to compare and differentiate materials based on their compactness or concentration of mass within a given volume.

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The maximum angular speed of the turntable to avoid slipping is option (2), √(µg/x).

The maximum angular speed of the turntable can be found by equating the centrifugal force with the frictional force acting on the block.

At maximum angular speed, the centrifugal force acting on the block is given by F = mRω², where R = x is the distance of the block from the center and ω is the angular speed of the turntable.

The frictional force acting on the block is f = µN, where N is the normal force on the block.

At maximum angular speed, the normal force N is equal to the weight of the block, N = mg.

Equating the centrifugal force and the frictional force:

mRω² = µN

mRω² = µmg

ω² = µg/R

ω = √(µg/R)

Substituting R = x:

ω = √(µg/x)

Therefore, the maximum angular speed of the turntable so that the block does not slip is given by √(µg/x).

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Answer:

The gravitational potential energy of a squirrel is 53.312 J.

Explanation:

We have,

Mass of a squirrel is 0.68 kg

It is placed at a height of 8 m above the ground.

It is required to find the gravitational potential energy of a squirrel. It is possessed by an object due to its position. Its formula is given by :

\(E=mgh\\\\E=0.68\times 9.8\times 8\\\\E=53.312\ J\)

So, the gravitational potential energy of a squirrel is 53.312 J.

Answer:

it will option B,hope it helps

C. The wavelength is longer.

A sound wave is called a longitudinal wave because compressions and rarefactions in the air produce it.

The air particles vibrate parallel to the direction of propagation.

A longitudinal wave consists of a repeating pattern of compressions and rarefactions.

Thus, the wavelength is commonly measured as the distance from one compression to the next adjacent compression or the distance from one rarefaction to the next adjacent rarefaction.

Longitudinal waves move through a medium from the point of the disturbance in the form of compressions (where particles of the medium are bunched together) followed by rarefactions (where particles of the medium are farther apart).

In longitudinal waves, the distance from one compression to the next is the wavelength.

Therefore,

In longitudinal wave the wavelength is longer.

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The winch needs a minimum power of 320 Watts to pull the object up the incline at 4.00 m/s. To determine the minimum power required by the winch, we need to consider the work done against friction and the time it takes to move the object.

The power (P) can be calculated using the formula:

P = work / time

The work done against friction can be calculated using the formula:

work = force * distance

The force of friction (F) can be determined by multiplying the coefficient of kinetic friction (μ) with the normal force (N). The normal force can be calculated by multiplying the mass of the object (m) with the acceleration due to gravity (g).

force of friction (F) = μ * N

force of friction (F) = μ * m * g

The distance traveled by the object can be determined using the formula:

distance = speed * time

Now, let's calculate the power:

First, we need to calculate the force of friction (F):

F = μ * m * g

Given that the coefficient of kinetic friction (μ) is 0.200, the mass of the object (m) is not provided, and the acceleration due to gravity (g) is approximately 9.8 m/s².

Next, we need to calculate the distance traveled by the object. It is not provided in the question, so we cannot proceed with the calculation of power without this information.

Without knowing the distance traveled by the object, we cannot calculate the minimum power required by the winch to pull the object up the incline at 4.00 m/s.

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approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.To calculate the volume of coffee that has spilled out of the beaker, we can use the concept of thermal expansion. The change in volume is given by the formula ΔV = βVΔT, where β is the coefficient of volume expansion, V is the initial volume, and ΔT is the change in temperature.

First, let's convert the initial volume to cubic meters: V = 0.858 x 10^(-3) m^3.
Next, we calculate the change in temperature: ΔT = 90.6 - 18.2 = 72.4 °C.
The coefficient of volume expansion for water (and coffee) is approximately β = 3.4 x 10^(-4) °C^(-1).
Plugging in these values into the formula, we get:
ΔV = (3.4 x 10^(-4) °C^(-1)) * (0.858 x 10^(-3) m^3) * (72.4 °C) = 2.093 x 10^(-6) m^3.

Therefore, approximately 2.093 x 10^(-6) cubic meters (or 2.093 milliliters) of coffee has spilled out of the beaker.

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According to the statement the resulting electric force between them will decrease by a factor of 16 (4^2 = 16).

The electric force between two point charges is given by Coulomb's Law, which states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
F = k * (q1*q2)/(r^2)
Where F is the electric force, k is the Coulomb constant, q1 and q2 are the charges of the two point charges, and r is the distance between them.
If the initial distance between the two point charges is 2 cm, and the final distance is 8 cm, then the distance has increased by a factor of 4 (8/2 = 4).
Therefore, the resulting electric force between them will decrease by a factor of 16 (4^2 = 16).
This means that the electric force between the two point charges will be 1/16th of what it was before, once they have been moved to a distance of 8 cm apart.

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The total required area of the heat exchanger decreases with increasing tube diameter.

When designing a single tube-pass heat exchanger to heat water by condensing steam in the shell, the total required area of the exchanger is influenced by the tube diameter selected. In this scenario, the water flows through smooth horizontal tubes in a turbulent flow while the steam is condensed dropwise in the shell.

The tube diameter plays a significant role in determining the total required area of the exchanger. As the tube diameter increases, the cross-sectional area for water flow also increases. This results in a higher flow area for the water, reducing its velocity. With reduced velocity, the water spends more time in contact with the tube wall, leading to a greater heat transfer rate.

As the heat transfer rate increases, the overall heat transfer efficiency improves, and consequently, the required area of the exchanger decreases. This is because larger tube diameters provide a larger heat transfer surface area, allowing for more efficient heat exchange between the water and the steam.

The effect of tube diameter on the total required area in a single tube-pass heat exchanger can be explained by considering the fluid dynamics and heat transfer processes involved. The increase in tube diameter allows for a larger cross-sectional area, which leads to a decrease in water velocity. This reduced velocity enhances the contact time between the water and the tube wall, facilitating better heat transfer.

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Answer:Single-Replacement, synthesis, decomposition, combustion.

Explanation:

Had to get it wrong to find out

Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions. Hence option B is correct.

Redox reaction is type of reaction in which oxidation number participating molecules changes. Redox reaction involves two types of the reaction oxidation and reduction. these two reaction take place simultaneous. Oxidation is the loss of electrons and reduction is the gain of electrons.

Oxidation is nothing but addition of oxygen and loss of hydrogen and reduction is loss of oxygen and gain of hydrogen.

Redox reactions include Single-replacement, synthesis, decomposition, composition Reactions.

The oxidation half-reaction is: H₂ → 2H⁺ + 2e⁻

The reduction half-reaction is: F₂ + 2e⁻ → 2F⁻

Hence option B is correct.

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Answer:

b

Explanation:

Answer:

b. Thermal energy will flow from your hand to the snowball.

Explanation:

Answer:

B

Explanation:

Nerve impulses are transient changes in electrical charge that move along the axon of the neuron. An electrical charge that moves along a neuron's membrane is known as an action potential.

It can occur when chemical inputs from a neighbouring cell alter the membrane potential of a neuron. The membrane potential refers to the variation in the net electrical charge of these ions between the inside and exterior of the cell. The clustering of ions on opposing sides of the cell membrane is the cause of this variation in net electrical charge. The electrical charge difference across the cell membrane leads to the membrane potential. Nerve impulse transmission.

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Answer:

dsadadas

Explanation:

dadadda

Answer:

GET GOOD

Explanation:

Answer:

the law of interaction, says that if one body exerts a force on a second body, the second body exerts a force equal in magnitude and opposite in direction on the first body. It's the law of action-reaction, and it helps to explain why you feel a jolt when you collide with another bumper car.

Heavier cars have more momentum, so they travel further, given the same amount of friction.

Explanation:

It takes around 4 seconds for the camera ro fall 250 feet

use the quadratic formula where a=-16 b=0 and c=250

The time it takes for the sandbag to reach the ground is approximately 14.57 seconds. The velocity of the sandbag when it hits the ground is approximately 40.72 m/s.

To calculate the time it takes for the sandbag to reach the ground, we can use the equation of motion for free fall. Since the sandbag is dropped from the balloon, its initial velocity is 0 m/s. The acceleration due to gravity is approximately 9.8 m/s². Using the equation:

s = ut + (1/2)at²

where s is the displacement, u is the initial velocity, t is the time, and a is the acceleration, we can rearrange the equation to solve for time:

t = √(2s/a)

Plugging in the values, where the displacement (s) is the height of the balloon from the ground level, we get:

t = √(2 × 350 m / 9.8 m/s²) ≈ 14.57 seconds

For the velocity of the sandbag when it hits the ground, we can use another equation of motion:

v = u + at

where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Since the sandbag is falling vertically downward, the acceleration due to gravity acts in the same direction, and the initial velocity is still 0 m/s. Plugging in the values, we have:

v = 0 m/s + (9.8 m/s²)(14.57 s) ≈ 40.72 m/s

Therefore, the velocity of the sandbag when it hits the ground is approximately 40.72 m/s.

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The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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Answer:

Explanation:

nuclear fusion?

Answer:

show vector 2A and maybe i can help

Explanation:

Answer:there is the scetch in the picture

Explanation:

A mass is a fixed quantity of matter. The weight that mass feels depends on the Gravity acting on the mass.

In physics, gravity  is a essential interplay which reasons mutual appeal among all matters with mass or energy. Gravity is, with the aid of using far, the weakest of the 4 essential interactions, about 1038 instances weaker than the sturdy interplay, 1036 instances weaker than the electromagnetic force and 1029 instances weaker than the susceptible interplay. As a result, it has no substantial have an impact on at the extent of subatomic particles. However, gravity is the maximum substantial interplay among gadgets at the macroscopic scale, and it determines the movement of planets, stars, galaxies, and even light.

On Earth, gravity gives weight to bodily gadgets, and the Moon's gravity is answerable for sub lunar tides within side the oceans (the corresponding antipodal tide is as a result of the inertia of the Earth and Moon orbiting one another).

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Answer:

D) v= 6.4 m/s a=10m/s^2

Explanation:

At top vnet= ucos (theta)

= 10 cos (50)

=10× 0.64=6.4m/s

Acc will be g (10m/s^2)

•At top point vy=0 and vx=ucos (theta)

Horizontal vel always remain same.

The magnitude of the acceleration of the block is 1.78m/s².

The coefficient of kinetic friction between the block and the ramp is  0.368.

The resistive force of friction (Fr), which pushes the objects together, is divided by the normal or perpendicular force (N), which pushes them apart, to produce the coefficient of friction (fr), which is a numerical value. The following formula represents it: fr = Fr/N.

Given,

m=3.00kg, θ=30° ,

x= 2.00m, t=1.50s.

constant rate of acceleration,

\(X_{f} = v_{i} t\) + 1/2at²

solving,

a = 2(\(X_{f}\)-\(v_{i} t\))/t²

a = 2(2-0)/(1.5)²

a = 1.78m/s².

We have neither a burrowing-in nor a taking-off action when Newton's law is applied in the y direction, which is perpendicular to the inclination. The y component of acceleration is then equal to zero:

 ∑ \(F_{y}\)=n–mgcosθ=0

Thus n=mgcosθ

Because  f=\(\mu_{k}\)n

\(\mu_{k}\) = f/mgcosθ

\(\mu_{k}\) = 9.37/3×9.8×cos30°

\(\mu_{k}\) = 0.368.

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Everyone is subject to natural background radiation is (a). true statement because natural background radiation, which includes radiation from the environment and natural sources including radon gas from the ground, cosmic rays from space, and radioactive elements in the earth's crust, is a risk to everyone.

Humans are inevitably exposed to this type of radiation on a regular basis, albeit the amounts differ according to altitude, geography, and other factors. The amount of ionizing radiation in the environment at a specific location that isn't the result of intentional introduction of radiation sources is known as background radiation.

There are many different natural and man-made sources of background radiation. In addition to man-made medical X-rays, radioactive fallout from nuclear weapons testing, and nuclear accidents, these include cosmic radiation as well as environmental radioactivity from naturally occurring radioactive minerals (such as radon and radium).

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