Electric circuits are used to convert the kinetic energy of moving charges, such as electrons, into useful work, such as powering your electronic devices. True or False?

Answer:

Explanation:

Formula

E = I * R                                      Substitute the givens into the formula

Givens

E = 120 volts

I = ?

R = 4800 0hms

Solution

Ohms law is a 3 letter equation that relates volts ohms (resistance) * current (in amperes)

E = i * R

120 V = I * 4800 ohms               Divide both sides by 4800  

120 V/4800 = I * 4800/4800     Divide

0.025 amps = I

Answer

I = 0.025 amps

when you’re trying to ollie higher, your front foot will be slightly farther back than it normally is. this lets you drag more on the board, helping you get the height you need. hope this helped :)

Answer: I had the same problem if I was you I would use my phone and record a slowdown of your ollie. Also pop hard and focus on how much  you jump, your ollie is only going to go as high as you jump so try to get some Hight also do moving first it helps in the long run trust if you dont its just as hard as learning how to ollie in the first place.

Explanation: keep riding I hope the best

The earliest known observations of the night sky date back to ancient civilizations such as the Babylonians, Egyptians, and Chinese, who recorded the positions of stars, planets, and other celestial bodies.

a = F / m

where F is the force (thrust) acting on the rocket and m is the mass of the rocket.

In this case, F = 20,000 N and m = 3,000 kg

So, a = 20,000 N / 3,000 kg = 6.67 m/s²

b) To calculate the final speed of the rocket after 5 minutes, you can use the formula:

v = a * t

where v is the final speed, a is the acceleration and t is the time.

In this case, a = 6.67 m/s² and t = 5 minutes = 300 seconds.

So, v = 6.67 m/s² * 300 seconds = 2,001 m/s

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If the applied voltage is polarised in the opposite direction (negative on red and positive on black), the metre will display "backwards."

Some devices may be electrically charged at all times if an outlet has reverse polarity. Electricity will flow to the switch in a properly connected outlet; with reversed polarity, it will be present in the item even when it is not switched on.Reverse polarity protection is an internal circuit that ensures the device is not destroyed if the polarity of the power source is reversed. The reverse polarity protection circuit disables power to the transmitter or transducer's sensitive electronic circuitry.If you reside in a house that has had amateur electrical work done, there's a strong chance you have some outlets with reversed polarity. That essentially means that some of your channels may surprise you. Uh oh! While not all shocks are lethal, they are all painful and unpleasant. Only a qualified electrical contractor in North Scottsdale, AZ can perform electrical repairs in your home.

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The volume of water that has the same mass as 70.0 cm³ of gold is 1351 cm³

The density of water is 1 g/cm³ and the density of gold is 19.3 g/cm³. Therefore, we can use the ratio of their densities to determine the volume of water that has the same mass as 70.0 cm³ of gold.

First, we need to find the mass of the gold. We can use the density of gold to do this:

mass of gold = volume of gold x density of gold

mass of gold = 70.0 cm³ x 19.3 g/cm³

mass of gold = 1351 g

Now we can use the mass of gold and the density of water to find the volume of water that has the same mass:

mass of water = mass of gold

volume of water x density of water = mass of gold

volume of water = mass of gold / density of water

volume of water = 1351 g / 1 g/cm³

volume of water = 1351 cm³

Therefore, the amount of water with the same mass as 70.0 cm³ of gold is 1351 cm³.

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Speed of plane, x = 616 mph and speed of wind, c = 56 mph

Time rate at which an object is moving along a path is known as speed, whereas velocity is the rate and direction of the movement of object.

Let x be the speed of plane and c be the speed of wind

then x - c = speed without wind; and x + c= speed with wind

We know, distance=speed* time

2hr30min = 150 min=2.5 hr

1680 =(x-c)* 3

1680 =3x -3c --- (1)

1680 = (x+c)* 2.5

1680 =2.5x+2.5c ----(2)

Multiply equation (1) with 2.5 and equation (2) with 3

4200 = 7.5x -7.5c  

5040 =7.5x + 7.5c

Adding these 2 equation to eliminate c

9240 =15 x

Speed of plane, x = 616 mph

1680 =3x -3c

3c =3x-1680

3c =3(616) -1680

3c =168

Speed of wind, c = 56 mph

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The magnetic field of an electromagnetic wave is given by the equation: B = B_0 sin(kx - ωt)

where B is the magnetic field amplitude, B_0 is the maximum value of the magnetic field, k is the wave number, x is the position, ω is the angular frequency, and t is the time. In the given equation b = (5.1 × 10^(-10)) sin(kx - t) t, it appears that the magnetic field is varying with both position and time, which is unusual for an electromagnetic wave. The presence of the "t" term within the sine function suggests a dependence of the magnetic field on time. However, this equation does not represent the standard form of an electromagnetic wave. If you provide more information or clarify the equation, I would be able to assist you further.

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Answer:

Explain. yes it is possible because when the net force is zero and acceleration is zero. ... no, Neglecting air friction, the only force acting on this object is the force of gravity downward. There is no force of equal magnitude as the force of gravity acting in the opposite direction.

Even though New Zealand is very far away, transporting milk from there to England can be more energy efficient than producing milk in England because New Zealand has a much more favorable climate for dairy farming, allowing cows to graze outdoors all year round.

This means that less energy is needed for heating, lighting, and ventilation compared to intensive indoor dairy farming in England. In addition, New Zealand's pasture-based farming practices require less energy-intensive inputs such as feed and fertilizer, further reducing the carbon footprint of milk production.

Lastly, modern transport methods such as refrigerated ships can transport large quantities of milk over long distances with relatively low energy use, making it a viable option for meeting demand in countries with less favorable conditions for dairy farming.

Most cows in New Zealand are Friesians (the black and white cows you see when driving past a farm) or Jersey cows (the soft brown cows). It's amazing how cows turn green grass into white milk. It is considered the most expensive grain or food for cows.

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The purpose of this lab is to explore the relationship between the angle of incidence and the angle of refraction for a given medium.  By examining the data collected during the experiment and analyzing the relationship between these angles, you will be able to address this question and gain a deeper understanding of the behavior of light during refraction.

During the lab, you will measure the angles of incidence and refraction for light passing through a medium. The angle of incidence refers to the angle at which light strikes the interface between two media, while the angle of refraction is the angle at which the light bends as it enters the second medium.

To investigate the relationship between these angles, you will vary the angle of incidence while keeping the properties of the medium constant. By measuring and recording the corresponding angles of refraction, you will be able to analyze the data and draw conclusions about their relationship.

The time required for this lab is approximately 45 minutes, but it may vary depending on your experimental setup and the complexity of the measurements.The main question to be answered in this lab is: How do the angle of incidence and the angle of refraction for a given medium compare to each other? By examining the data collected during the experiment and analyzing the relationship between these angles, you will be able to address this question and gain a deeper understanding of the behavior of light during refraction.

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Answer:I think it would be 0

Explanation:

Both are pushing with 100n therefore it will not move

Answer:

Friction creates warmth

The magnitude of the electric field at a point midway between the two charges is approximately 14334.78 N/C.

To calculate the magnitude of the electric field at a point midway between a -8.5 μC and a 6.2 μC charge 9.6 cm apart, we can use Coulomb's Law. Coulomb's Law states that the electric field between two charges is given by:

E = k * |q₁ - q₂| / r²

Where:

E is the electric field,

k is Coulomb's constant (k = 8.99 × 10⁹ N·m²/C²),

q₁ and q₂ are the magnitudes of the charges, and

r is the distance between the charges.

In this case:

q₁ = -8.5 μC = -8.5 × 10⁻⁶ C,

q₂ = 6.2 μC = 6.2 × 10⁻⁶ C,

r = 9.6 cm = 9.6 × 10⁻² m.

Plugging in the values into the equation, we get:

E = (8.99 × 10⁹ N·m²/C²) * (|-8.5 × 10⁻⁶ C - 6.2 × 10⁻⁶ C|) / (9.6 × 10⁻² m)².

E = (8.99 × 10⁹ N·m²/C²) * (14.7 × 10⁻⁶ C) / (9.6 × 10⁻² m)².

E = (8.99 × 10⁹ N·m²/C²) * (14.7 × 10⁻⁶ C) / (9.216 × 10⁻⁴ m²).

E = (8.99 × 10⁹ N·m²/C²) * (14.7 × 10⁻⁶ C) / (9.216 × 10⁻⁴ m²).

E ≈ 14334.78 N/C.

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The minimum force of friction necessary to stop the car just before hitting the deer is 3,000N.

Friction is a force between two surfaces that opposes motion when they rub against each other. It is the force that allows us to walk without slipping, and it is also the force that makes it difficult to move a heavy object. Friction is a type of non-conservative force, which means that it takes energy to overcome it, and that energy is not stored or conserved.

The force of friction necessary to stop the car can be determined using the equation F = mv²/2d. In this equation, F is the force of friction, m is the mass of the car (2,000kg), v is the initial velocity of the car (30m/s), and d is the distance between the car and the deer (300m). Plugging in the values, we get F = 2,000 ×(30)² / (2 × 300) = 3,000N. Therefore, the minimum force of friction necessary to stop the car just before hitting the deer is 3,000N.

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Answer:(a) For an object to be in focus, the distance from the lens to the object, d_o, must be such that the lens forms a sharp image on the film located at a distance of 51.0 mm from the lens. Using the thin lens equation,

1/f = 1/d_o + 1/d_i

where f is the focal length of the lens, and d_i is the distance between the lens and the image. Since the lens forms a sharp image on the film, d_i = 51.0 mm. Solving for d_o, we get

1/50.0 mm = 1/d_o + 1/51.0 mm

d_o = 2587 mm

Therefore, the object must be 2587 mm, or 2.59 m, away from the lens for it to be in focus.

(b) Let h_o be the height of the object and h_i be the height of the image. By similar triangles, we have

h_o / d_o = h_i / d_i

Solving for h_o, we get

h_o = (h_i * d_o) / d_i

Substituting the given values, we get

h_o = (2.00 cm * 2587 mm) / 51.0 mm

h_o = 101.2 cm

Therefore, the height of the object is 101.2 cm.

Explanation:

The velocity of the jet is calculated to be 900 miles/hr when the relation between velocities of both propeller and the jet is given.

The distance travelled by a propeller plane and a jet = 3000 miles

Velocity of the plane Vp = 1/3 Velocity of the jet Vj

Vp = 1/3 Vj

Vj = 3 Vp ----(1)

Time taken by the propeller plane to complete the trip = 10 hours

Velocity of the propeller plane = Distance of the propeller plane/Time

⇒ 3000/10 = 300 miles/hr

The velocity of the jet = 3 times the velocity of the propeller plane

⇒ 3 × 300 miles/hr = 900 miles/hr

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Dalton's atomic theory is still mostly true, and it forms the framework of modern chemistry.

Key Points:

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The observed effect is strongest in Region B due to its unique geographical characteristics. Region B exhibits a distinct pattern of high intensity and concentration of the observed effect compared to other regions in the figure. This can be attributed to several factors that contribute to the strength of the effect.

Firstly, Region B is characterized by its proximity to a major geographic feature, such as a mountain range or a large body of water. These features can significantly influence weather patterns and atmospheric conditions in the region. In the case of Region B, the presence of a nearby mountain range acts as a barrier, forcing air masses to rise and creating localized weather phenomena. This elevation change leads to variations in temperature, humidity, and wind patterns, which amplify the observed effect.

Secondly, the geographical location of Region B plays a crucial role. It is situated in a region where multiple air masses converge, resulting in the formation of atmospheric disturbances. This convergence leads to a collision of different weather systems, causing an intensification of the observed effect. Additionally, the positioning of Region B within the larger atmospheric circulation patterns, such as prevailing wind directions or jet streams, can further enhance the strength of the effect.

Furthermore, the local topography of Region B contributes to the amplification of the observed effect. The presence of valleys, slopes, or other geographical features can create microclimates within the region. These microclimates can trap air masses, moisture, or pollutants, leading to heightened concentrations and greater impact of the observed effect.

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The diameter of the X-ray source, calculated based on a flickering frequency of 200 cycles per second, is approximately 2.53 × 10⁻¹⁷ kilometers.

To calculate the diameter of the X-ray source, we need to utilize the concept of the diffraction limit. The diffraction limit states that the smallest resolvable detail in an image is determined by the wavelength of the radiation and the aperture size of the instrument.

In this case, since we are dealing with X-rays, which have a very short wavelength, we can assume that the diffraction limit is governed by the size of the X-ray source itself. The formula for the diffraction limit is given by:

θ = λ / D

Where θ is the angular resolution, λ is the wavelength of the radiation, and D is the diameter of the source.

To calculate the diameter, we rearrange the formula:

D = λ / θ

Since the flickering frequency is given as 200 cycles per second, which corresponds to 200 oscillations in one second, we can determine the angular resolution as:

θ = 2πf

Where f is the frequency. Substituting the values into the equation, we have:

θ = 2π * 200 = 400π radians per second

Assuming an X-ray wavelength of approximately 0.01 nm, or 10⁻¹¹ meters, we can calculate the diameter as:

D = (10⁻¹¹ m) / (400π rad/s) ≈ 2.53 × 10⁻¹⁴ meters

Converting this to kilometers, we find that the diameter of the X-ray source is approximately 2.53 × 10⁻¹⁷ kilometers.

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Given,

The mass of the fruit basket, m=10 kg

The height of the cliff, h=45 m

Kinetic energy is the energy possessed by an object due to its motion. Kinetic energy is directly proportional to the square of the velocity of the object.

Potential energy is the energy possessed by an object due to its position. The gravitational potential energy is directly proportional to the height at which the object is situated.

As the basket is at rest, its velocity is zero and hence it does not have kinetic energy.

Thus the energy possessed by the fruit basket is the potential energy.

The potential energy is given by,

Where g is the acceleration due to gravity.

On substituting the known values,

The potential energy of the fruit basket is 4410 J

Water boiling at 100 degrees Celsius is an example of a physical change known as vaporization or boiling.

At this temperature, the liquid water absorbs heat energy and undergoes a phase transition, transforming into water vapor or steam. The process occurs when the vapor pressure of the liquid equals the atmospheric pressure.

During boiling, the intermolecular forces between water molecules are overcome, leading to the formation of gas-phase molecules. This transition is accompanied by the absorption of heat energy, which increases the kinetic energy of the water molecules.

Boiling is an essential phenomenon in various applications, such as cooking, steam generation, and distillation. It plays a crucial role in many natural processes, including the water cycle.

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Considering the stress, the minimum width of the aluminum plate required to withstand a force of 49,700 N with no permanent deformation is 795.2 cm.

Stress, which is defined as force per unit area, may be used to indicate the aluminum's yield strength. As a result, we can determine the stress that corresponds to the aluminum's yield strength using the formula below:

Stress = yield strength equals 125 MPa or 125 N/cm2.

The aluminum plate's stress cannot be greater than its yield strength to prevent irreversible deformation of the material.

The force applied to the plate's surface may be related to its area using the stress formula:

Stress = force/area

area = 49,700 N / 125 N/cm² = 397.6 cm²

The area of the plate is the product of its width and thickness. Let's assume that the plate has a rectangular shape and solve for the minimum width required to achieve the required area:

area = width x thickness

width = area / thickness

         = 397.6 cm² / 0.5 cm

         = 795.2 cm

Therefore, the minimum width of the aluminum plate required to withstand a force of 49,700 N with no permanent deformation is 795.2 cm.

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Answer:

Some students appreciated the social aspect of Zoom classrooms, while others felt online education worked best for them when they were working on their own. ... Students said they appreciated having a well-planned work week and didn't appreciate “surprise” assignments online any more than they appreciate them in class

Explanation:

What's I know I said

What do you u write it

Answer:

When thermal energy is added to a substance at its melting or boiling point, the temperature of the substance remains constant as the added energy is used to break intermolecular bonds and cause a phase change from solid to liquid or from liquid to gas. In contrast, adding thermal energy at any temperature other than the melting or boiling point will cause the temperature of the substance to increase, as the added energy increases the kinetic energy of the particles, causing them to move faster and collide more frequently. At other temperatures, the intermolecular forces between the particles are not strong enough to cause a phase change until the substance reaches its melting or boiling point.

The normal stress on an inclined plane at 25 degrees can be calculated using σ = F / A * cos²θ, while the maximum normal stress is σ_max = F / A_max.

a. To calculate the normal stress developed on an inclined plane, we use the formula: σ = F / A * cos²θ. Given that the diameter of the rod is 12 inches, the radius (r) is half of the diameter, which is 6 inches or 0.5 feet. The cross-sectional area of the rod (A) can be calculated using the formula for the area of a circle: A = π * r². Substituting the values, we get A = π * (0.5)^2 = π * 0.25 = 0.7854 square feet.

Now, we can calculate the normal stress using the given axial tensile load (F) of 60 kips and the angle (θ) of 25 degrees. Since the load is given in kips (1 kip = 1000 pounds), we convert it to pounds by multiplying by 1000: F = 60 * 1000 = 60000 pounds.

Using the formula σ = F / A * cos²θ, we substitute the values and calculate the normal stress:

σ = 60000 / 0.7854 * cos²25 ≈ 95317.91 psi (pounds per square inch).

b. The maximum normal stress in the rod occurs when the inclined plane is aligned with the maximum cross-sectional area. In this case, the maximum cross-sectional area (A_max) is the same as the cross-sectional area of a circle, which is π * r². Substituting the radius value, we get A_max = π * (0.5)^2 = π * 0.25 = 0.7854 square feet.

To calculate the maximum normal stress (σ_max), we use the formula σ_max = F / A_max. Substituting the given axial tensile load (F) of 60 kips and the maximum cross-sectional area (A_max), we calculate the maximum normal stress:

σ_max = 60000 / 0.7854 ≈ 76448.44 psi (pounds per square inch).

Therefore, the normal stress developed on an inclined plane at an angle of 25 degrees with the cross section of the rod is approximately 95317.91 psi, and the maximum normal stress developed in the rod is approximately 76448.44 psi.

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Answer: 3.045 km/s

Explanation:

When an object is doing a circular motion, the velocity of the object is written as;

v = r*w

where;

r = radius of the circle

w = angular velocity.

In this case, we know that:

w = 7.25*10^(-5) s^-1

And the radius will be equal to the radius of the Earth, plus the height of the satellite, this is:

R = radius of the Earth + 35600 km = 6400km + 35600 km  = 42000 km

Then the velocity of the satellite will be:

v =  42000 km*7.25*10^(-5) s^-1 = 3.045 km/s

The velocity of a satellite with an orbit 35600 km above the surface of the earth and an angular velocity of 7.25×10–5 rad/sec = 3045 m/s

Velocity: This is the rate of change of displacement.

To solve this problem we need to use the formula for calculating the velocity of  an object in circular motion

The Velocity of the satellite is given as

V = ωr................ Equation 1

where V = velocity of the satellite, ω = angular velocity of the satellite, r = radius of the circle.

Note: r = height of the satellite above the surface of the earth+Radius of the earth

From the question,

Given: ω = 7.25×10⁻⁵ rad/sec, r = 35600+6400 = 42000 km = 4.2×10⁷ m

Substitute these values into equation 1

V = (7.25×10⁻⁵)(4.2×10⁷ )

V = 30.45×10²

V = 3045 m/s

Hence, the velocity of the satellite is 3045 m/s

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The least possible uncertainty in a measurement of the speed of an electron in an atom of lead, expressed as a percentage of the average speed, is approximately 0.85%.

The uncertainty in the measurement of the speed of an electron can be determined using the Heisenberg uncertainty principle, which states that there is a fundamental limit to the precision with which certain pairs of physical properties, such as position and momentum, can be known simultaneously. Mathematically, the uncertainty principle is expressed as:

\(\(\Delta x \cdot \Delta p \geq \frac{h}{4\pi}\)\)

where \(\(\Delta x\)\) is the uncertainty in position, \(\(\Delta p\)\) is the uncertainty in momentum, and h is the reduced Planck's constant.

In this case, we are interested in the uncertainty in the speed of the electron, which is related to its momentum. The momentum of an electron can be approximated as \(\(p = m \cdot v\)\), where m is the mass of the electron and v is its velocity. Since the mass of the electron remains constant, the uncertainty in momentum can be written as:

\(\(\Delta p = m \cdot \Delta v\)\)

To find the uncertainty in velocity, we can rearrange the equation as:

\(\(\Delta v = \frac{\Delta p}{m}\)\)

Now, we can substitute the values given in the problem. The mass of an electron is approximately \(\(9.10938356 \times 10^{-31}\)\) kg, and the average orbital speed is \(\(1.8 \times 10^8\)\) m/s. The uncertainty in velocity can be calculated as:

\(\(\Delta v = \frac{\Delta p}{m} = \frac{\frac{h}{4\pi}}{m} = \frac{h}{4\pi \cdot m}\)\)

Substituting the known values, we get:

\(\(\Delta v = \frac{6.62607015 \times 10^{-34}}{4\pi \cdot 9.10938356 \times 10^{-31}} \approx 2.20 \times 10^{-3}\) m/s\)

Finally, we can express the uncertainty in velocity as a percentage of the average speed:

\(\(\text{Uncertainty \%} = \frac{\Delta v}{\text{Average speed}} \times 100 = \frac{2.20 \times 10^{-3}}{1.8 \times 10^8} \times 100 \approx 0.85\%\)\)

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Answer:

Option C

Explanation:

Hydrocarbon + Oxygen = Carbon dioxide + Water

is example of combustion reaction