The average US house uses 10,972 kilowatt hours (kWh) in a year, an average of about 914 kWh per month. 1) hoover dammm produces about 4 billion kilowatt hours per year. How many houses can it power? 2) If the average (not hoover) dammm is 15 meters in height, how much water would have to drop out of the dam to power a house for a year?

Answer:

Friction of the mountain on the skier in the opposite direction

Explanation:

answered it on khan academy

Friction of the mountain on the skier in the opposite direction.

A force is a push or a pull that acts upon an object as a results of its interaction with another object. Forces result from interactions.

Forces result from contact interactions (normal, frictional, tensional, and applied forces are examples of contact forces) and other forces are the result of action-at-a-distance interactions (gravitational, electrical, and magnetic forces).

There are two forces resulting from this interaction - a force on the chair and a force on your body. These two forces are called action and reaction forces and are the subject of Newton's third law of motion.

Therefore, Friction of the mountain on the skier in the opposite direction.

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Answer:

C. Nucleus

Explanation:

The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell. Threads of chromatin in the nucleus contain deoxyribonucleic acid (DNA), the genetic material of the cell.

have a good day and here’s a funny comic just for fun! :)

Answer:

An image of the cosmic microwave background radiation, taken by the European Space Agency (ESA)'s Planck satellite in 2013, shows the small variations across the sky (Image credit: ESA/Planck Collaboration) The cosmic microwave background (CMB) is thought to be leftover radiation from the Big Bang, or the time when the universe began

Explanation:

Answer:

Forces come in pairs, so the force of gravity (9.8 N) with the mans weight (794N) on the earth is counteracted with the normal force ( the force of the earth back on the man) which is the same

Explanation:

Forces are available in pairs, so the force of gravity (nine.8 N) with the man's weight (794N) on the planet is counteracted with the everyday force ( the pressure of the earth again on the man) that's identical.

Gravitational force is a pressure that draws any items with mass. We name the gravitational force appealing as it constantly attempts to tug loads collectively, it never pushes them apart. In reality, every item, together with you, is pulling on each other objects inside the complete universe.

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Answer:

a)

Weight in Air = 0.3N

Weight in Water = 0.25N

Weight in Liquid = 0.24N.

Upthrust /Buoyant Force = Weight in Air – Weight in Fluid(Water in this case)

= 0.3 – 0.25

= 0.5N.

b) R.D of Body = Density of Body/Density of Standard Fluid(Water).

There's a Derived Formula for RD.

I'm gonna Apply it here.

Ask me for the derivation in the Comment section if you need it.

RD = α/ρ = (Weight in Air) / (Upthrust Force)

Where

α = density of the Body(or reference substance)

ρ = density of standard fluid (water)

= 0.3/0.05 = 6.

c) RD of Liquid = (Density of Liquid) /(Density of standard Fluid(water)

Or we just go by that formula

RD of Liquid = Weight in Air/Upthrust(In Liquid)

We'll be using the Upthrust in that Liquid now.

= 0.3 – 0.24 = 0.06

RD = 0.3/0.06 = 5.

Coordinate covalent bonds, also known as dative bonds or coordinate bonds, are a type of chemical bond formed by the sharing of a pair of electrons between two atoms, in which one of the atoms provides both electrons.

The atom that provides both electrons is said to have "donated" its electrons, while the other atom is said to have "accepted" the electrons.

In a coordinate covalent bond, the bond is formed because one of the atoms has a spare pair of electrons that it can donate to the other atom, which has a shortage of electrons. This results in a stronger bond than a regular covalent bond, as both electrons come from the same atom.

Coordinate covalent bonds are often seen in compounds that contain transition metals, where the metal ion donates a pair of electrons to a ligand (another molecule or ion) to form a complex. These bonds are important in many biological systems, such as enzymes, where the transition metal ions coordinate with ligands to form a specific active site for a reaction.

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In a refracting telescope, the distance between the objective and eyepiece lenses satisfies a certain relationship that ensures the image produced by the objective is at infinity and is used as the object for the eyepiece.

A refracting telescope consists of two lenses: the objective lens and the eyepiece lens. The objective lens produces an image of a distant object at its focal point, which is located at a distance f1 from the lens. This image is real and inverted, but it is also very small.

The eyepiece lens is placed in front of this image and produces a magnified virtual image that can be viewed by the observer. The distance between the eyepiece lens and the objective lens is called the tube length.

For the telescope to work properly, the distance between the lenses must satisfy the relationship f2 = f1/ (M-1), where f2 is the focal length of the eyepiece lens, f1 is the focal length of the objective lens, and M is the magnification of the telescope.

This relationship ensures that the image produced by the objective lens is at infinity and is used as the object for the eyepiece. It also ensures that the magnification of the telescope is equal to the ratio of the focal lengths of the two lenses.

In conclusion, the distance between the objective and eyepiece lenses in a refracting telescope satisfies a specific relationship that ensures the image produced by the objective is at infinity and is used as the object for the eyepiece.

This relationship is f2 = f1/(M-1), where f1 and f2 are the focal lengths of the objective and eyepiece lenses, respectively, and M is the magnification of the telescope. This relationship is essential for the proper functioning of the telescope and for producing a magnified, clear image of distant objects.

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As said, cyclonic airflow is characterized by convergence at the surface and divergence above.

In the Northern Hemisphere, surface winds of cyclones blow anticlockwise, whereas, in the Southern Hemisphere, they blow clockwise. Cyclones are named for the way their winds swirl in a circle around their obvious center eye. The Coriolis effect explains why the flow of blood is going in the opposite direction.

Any significant wind storm that moves clockwise to the south of the equator and anticlockwise to the north and revolves around a low-pressure center is called a cyclone.

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The X component was 13.4m and the Y component was 19.9m.

define magnitude ?

A crucial question in science is undoubtedly what is magnitude in physics. Magnitude is a term used to describe size or distance. We can connect the amount of the movement to the size and movement speed of the item.

The magnitude of a thing or a quantity is its size. A automobile moves at a quicker pace than a motorcycle, just like in terms of speed. In this situation, the car's speed is greater than the motorbike's. Let's now talk about what magnitude means in physics.

y=m sin(∅)

x=m cos(∅)

y=2+sin(56)=19.89

=19.89 ≈ 19.9m

x=2+cos(56)=13.42

=13.42≈13.4m

The X component was 13.4m and the Y component was 19.9m.

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Since the relationship between wavelength and frequency is inverse, the wavelength of the sound coming from source A is half that of the sound coming from source B. This implies that wavelength is cut in half as frequency is doubled.

The distance between adjacent, identical wave components, such as between adjacent compressions as shown in Figure 17.8, is the wavelength of a sound. The frequency is the number of waves passing a point in a unit of time, and it is the same as the frequency of the source.

When anything vibrates, a sound is made. The medium (such as water, air, etc.) around the vibrating body also vibrates. Air vibrations are referred to as longitudinal waves.

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B, A mechanical wave transfers energy through empty space

A wave that is an oscillation of matter and is responsible for the transfer of energy through a medium is called a mechanical wave. The distance of the wave's propagation is limited by the medium of transmission.

A mechanical wave is a wave that is not capable of transmitting its energy through a vacuum. Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave.

Answer:

A is your answer

Explanation:

I am an former AP Physics student.

Answer:

10m/s

Explanation:

500÷50 gets your answer

The density,  D = m/V = 45.93/0.0225 = 2041.33 g/cm3.

Density is a measure of mass per unit volume. It is defined as the mass of an object divided by its volume. Density is an important physical property of matter, as it affects the behavior of objects in different environments. Density is also a useful tool for measuring the concentration of a particular object or material. The higher the density of an object, the more mass it has for a given volume. Density is typically expressed in kilograms per cubic meter (kg/m3).

To calculate the density of the table tennis ball, we need to know the mass and volume of the ball. The mass of the table tennis ball is 2.7g, and the volume is 0.0067cm3. To calculate the density, we divide the mass by the volume, so D = m/V = 2.7/0.0067 = 402.99 g/cm3.

To calculate the density of the golf ball, we need to know the mass and volume of the ball. The mass of the golf ball is 45.93g, and the volume is 0.0225cm3. To calculate the density, we divide the mass by the volume, so D = m/V = 45.93/0.0225 = 2041.33 g/cm3.

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Answer:

7 meters, 2.8 meters

Explanation:

work done (nm) = force (n) * distance (m)

140= 20 * m

140/20 = m

m=7 meters

140= 50 * m

140/50 = m

m= 2.8 meters

Answer:

Hamid

Explanation:

I got it right on my test

The statement that describes what happens in the graph is option (B).

The lander's velocity decreases toward the reference.

Velocity time graph is a type of graph that describes the change in velocity with respect to time of motion of an object.

Below is the basic explanation of the behavior of the average velocity of the particle with time.

Thus, we can conclude that between 20 and 25 seconds in the velocity tike graph, the average velocity of the object decreased towards the reference point (reference velocity = - 40 m/s.).

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If the distance between two objects is 4.00 m and the distance is tripled, then the new distance will be 12.00 m.

To find out the new distance, you need to multiply the original distance by the factor by which it is tripled, which is 3.In other words, if the distance between two objects is "d", and it is tripled, then the new distance is 3d.

Using this formula, if the original distance is 4.00 m, then the new distance will be 3 x 4.00 m = 12.00 m.

The new distance is three times the original distance.

Therefore, the new distance between the two objects will be 12.00 meters if the original distance was 4.00 meters and it was tripled.

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The solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma.

The solar wind, which is a stream of charged particles (plasma) emitted by the Sun, exhibits characteristics of a highly ionized plasma. As it travels from the Sun to the Earth, the solar wind encounters variations in temperature, density, pressure, and speed. In this case, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, the solar wind can be classified as a highly ionized plasma.

During a Coronal Mass Ejection (CME), eruptive phenomena on the Sun's surface cause a sudden release of a large amount of plasma and magnetic fields into space. This disturbance leads to an increase in the temperature of the solar wind to around 10^7 K and an increase in its speed to approximately 10^3 km/s. This enhanced energy and velocity result in a significant disruption of the solar wind's flow, making it a turbulent fluid.

Turbulent fluids are characterized by chaotic and irregular motion, with strong fluctuations and mixing. The increased temperature and speed during a CME generate turbulent behavior within the solar wind, leading to the disruption and mixing of plasma particles along its trajectory.

To determine the type of fluid flow, the Reynolds number (Re) is often used. It relates the flow's characteristics, such as velocity and length, to the fluid's viscosity. In this case, since the solar wind is a plasma and has negligible viscosity, the Reynolds number is extremely high, well above the turbulent threshold of 4000. Therefore, the solar wind with increased temperature and speed due to a CME can be classified as a turbulent fluid.

In summary, the solar wind, with a constant temperature of 1.3x10^5 K and a speed of 450 km/s, is a highly ionized plasma. However, during a Coronal Mass Ejection (CME), the temperature and speed of the solar wind increase significantly, leading to turbulent fluid behavior.

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For the slab of volume charge density pv = z2, and thickness h, the equivalent surface charge density pseq can be calculated as: pseq = z2 * h.

The equivalent surface charge density pseq can be determined using the following equation:

pseq = pv * h

In this equation, pv is the volume charge density of the slab, and h is the thickness of the slab.

Density is generally defined as the measurement of how tightly a material is packed together.

It is mainly defined as the mass per unit volume. Density Symbol: D or ρ Density Formula: ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.
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Answer:

a

Explanation:

Answer:

the pressure within the atmosphere of Earth

Explanation:

Atmospheric pressure is a force in an area pushed against a surface by the weight of the atmosphere of the earth.

Answer:

Answer is radiant and chemical.

Hope this help:)

Sry if wrong

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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Answer:

1 atm = 1.01E5 nt/m^2 = 1.01E5 pascals

5.05E5 nt/m^2 = 5.05E5 pascals

1 pascal = 1 nt/m^2

(a) The acceleration of the crate  is  1.5 m/s^2

(b) The crate’s final velocity is 9 m/s.

To move the crate with a constant velocity, the force you apply must equal the force of friction. So, to move the crate, you must push with a force of 275 N.

If you push with a force of 380 N, the net force on the crate will be;

F (net)  380 N - 275 N = 105 N.

The acceleration of the crate will be given by Newton's second law of motion:

a = F / m

where;

So, substituting in the known values, we get:

a = 105 N / 70 kg = 1.5 m/s^2

Finally, if the crate started from rest, its final velocity after 6 seconds can be found using the equation:

v = at

v = 1.5 m/s^2  x  6s = 9 m/s

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Answer:

the action of investigating something or someone; formal or systematic examination or research.

Explanation:

This definition is provided by Oxford Languages

The average power necessary to move a 35 kg block up a frictionless 30° incline at 5 m/s is 121 W.

To calculate the average power required, we can use the formula: Power = Work / Time. The work done in moving the block up the incline can be determined using the equation: Work = Force * Distance. Since the incline is frictionless, the only force acting on the block is the component of its weight parallel to the incline. This force can be calculated using the formula: Force = Weight * sin(theta), where theta is the angle of the incline and Weight is the gravitational force acting on the block. Weight can be determined using the equation: Weight = mass * gravitational acceleration.

First, let's calculate the weight of the block: Weight = 35 kg * 9.8 m/s² ≈ 343 N. Next, we calculate the force parallel to the incline: Force = 343 N * sin(30°) ≈ 171.5 N. To determine the distance traveled, we need to find the vertical displacement of the block. The vertical component of the velocity can be calculated using the equation: Vertical Velocity = Velocity * sin(theta). Substituting the given values, we get Vertical Velocity = 5 m/s * sin(30°) ≈ 2.5 m/s. Using the equation for displacement, we have Distance = Vertical Velocity * Time = 2.5 m/s * Time.

Now, substituting the values into the formula for work, we get Work = Force * Distance = 171.5 N * (2.5 m/s * Time). Finally, we can calculate the average power by dividing the work done by the time taken: Power = Work / Time = (171.5 N * (2.5 m/s * Time)) / Time = 171.5 N * 2.5 m/s = 428.75 W. Therefore, the average power necessary to move the 35 kg block up the frictionless 30° incline at 5 m/s is approximately 121 W.

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Liquid containers are necessary to store liquids or other fluids, and are manufactured using various materials. These materials have unique properties and physical characteristics to meet the diverse requirements of different fluids and their storage conditions. Two of the materials used to make liquid containers are covalently bonded and metal.

1) Covalently bonded materials:Covalent bonds are strong bonds formed between atoms by sharing electrons. Covalently bonded materials are non-metallic materials that use a covalent bond between atoms to form the material. Examples of covalently bonded materials that can be used to manufacture liquid containers include:

- Polyethylene Terephthalate (PET): PET is a plastic material used to make water bottles and soft drink bottles. PET is lightweight and unbreakable, making it ideal for shipping and storing liquids.

- Polypropylene (PP): PP is a popular plastic material that is lightweight, durable, and resistant to chemical reactions. PP is used to make containers that store harsh chemicals and strong acids, as well as food containers, such as yogurt cups and margarine tubs.

In conclusion, there are many materials available that can be used to manufacture liquid containers, including covalently bonded materials and metals. The choice of material used depends on the type of liquid being stored and the storage conditions.

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½ × 18 × 6² = 324 J

hope that helps^^

Answer:

V = 5 m³

Explanation:

The density of air, d = 1.2 kg/m³

Mass of the dry air, m = 6 kg

We need to find the volume o the gas. We know that, the density of an object is given by mass divided by its volume. So,

\(d=\dfrac{m}{V}\\\\V=\dfrac{m}{d}\\\\V=\dfrac{6}{1.2}\\\\V=5\ m^3\)

So, the volume of the dry air is 5 m³.