Which of the following is NOT an example of a scalar quantity?

75 degrees Celsius
22.5 miles
2.0 meters, east
258 km

Which of the following is NOT an example of a vector quantity?

75 degrees Celsius
22.5 miles, south
2.0 meters, east
258 km, north

The amount of work done by Pablo is 16 J.

The work done by Pablo on the bag of flour is given by the formula:

work = force x distance x cos(theta)

where force is the magnitude of the force applied, distance is the distance moved by the object, and theta is the angle between the direction of the force and the direction of the displacement. In this case, the angle between the direction of the force and the direction of the displacement is 0 degrees (since Pablo lifted the bag straight up), so cos(theta) = 1. Substituting the given values, we get:

work = 20 N x 0.8 m x 1 = 16 J

Therefore, Pablo did 16 J of work on the bag of flour.

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Equation of the regression line can be found by using linear regression which is Extension (MM) = a + b * Mass (G)

The equation of the regression line can be found by using linear regression, which is a method of finding the line of best fit that describes the relationship between two variables. In this case, the two variables are the mass in grams (G) and the extension in millimeters (MM).

To find the equation of the regression line, the student could use the method of least squares, which is a method of finding the line that minimizes the sum of the squared errors between the observed data and the predicted data.

Regression line equation is:

Extension (MM) = a + b * Mass (G)

Where "a" is the y-intercept, "b" is the slope of the line, and "Mass (G)" and "Extension (MM)" are the variables.

To find the values of "a" and "b", the student could use the following formulas:

B is equal to (NXY - XY) / (NX2 - (X)XY).

A is equal to (ΣY - bΣX) / N

Where N is the number of data points, ΣX is the sum of the mass values, ΣY is the sum of the extension values, and ΣXY is the sum of the product of the mass and extension values for each data point.

Once the values of "a" and "b" have been found, the equation of the regression line can be substituted into the equation to find the predicted extension for any given mass. This will give the student a model for how the extension of the spring is related to the mass that is attached to it.

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Gamma rays and radio waves both fall under the electromagnetic spectrum. Presented is a picture that shows the complete spectrum. But the optical telescope can only see the visible spectrum. As a result, it is limited to frequencies between \(400\)  and  \(700 nm\).

It is safe to infer that Mike will be observing the visible region of the electromagnetic spectrum, since he recently bought an optical telescope.

The capacity of a thing to attract other objects to it; connected with or produced by the magnetic force. Physics. The study of the relationship between magnetism and electricity is referred to as electromagnetism.

The colours of the rainbow that the human eye can see, from violet to red, are included in this region of the electromagnetic spectrum.

Therefore, the closest frequency Mike can see with his new device is in the visible light spectrum, which lies between ultraviolet and infrared on the electromagnetic spectrum.

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Based on the equations e=hv and e=hc/^lambda, we can say that energy increases as frequency increases. Therefore, FM radio waves with a frequency of 1.015 x 10^8 Hz (101.5 MHz) have less energy compared to visible green light with a frequency of 5 x 10^14 Hz.

To understand this better, we can look at the frequency and wavelength of both the FM radio waves and visible green light. FM radio waves have a lower frequency of 1.015 x 10^8 Hz (101.5 MHz) and a longer wavelength of approximately 3 meters, while visible green light has a higher frequency of 5 x 10^14 Hz and a shorter wavelength of approximately 500 nanometers.

Since energy is directly proportional to frequency and inversely proportional to wavelength, we can conclude that visible green light has higher energy compared to FM radio waves. This is because visible green light has a higher frequency and a shorter wavelength, which means that it carries more energy per photon.

In summary, visible green light with a frequency of 5 x 10^14 Hz has higher energy compared to FM radio waves with a frequency of 1.015 x 10^8 Hz (101.5 MHz) due to its higher frequency and shorter wavelength.

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Answer:

Hehe :) Fun question, Ig Logan Paul?? XD

The electric potential at 70 cm to the right of the left charge is 7.125 x \(10^3 V.\)

To calculate the electric potential at a point due to two point charges, we need to use the following formula:

V = kq1 / r1 + kq2 / r2

where V is the electric potential, k is Coulomb's constant (\(9 x 10^9 N m^2 / C^2\)), q1 and q2 are the magnitudes of the charges, r1 and r2 are the distances between the point and the charges.

In this case, the left charge has a magnitude of 3 micro-c and the right charge has a magnitude of 7 micro-c. The distance between the left charge and the point of interest (70 cm to the right of the left charge) is 120 cm, and the distance between the right charge and the point of interest is 50 cm.

So, plugging in the values, we get:

V = (9 x \(10^9\)N \(m^2\) / \(C^2\)) x (3 x \(10^-6\) C) / 1.2 + (9 x \(10^9\) N \(m^2\) / \(C^2\)) x (7 x \(10^-6\) C) / 0.5

Simplifying this expression gives:

V = 7.125 x\(10^3\) V

Therefore, the electric potential at 70 cm to the right of the left charge is 7.125 x \(10^3 V.\)

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Force of a crate : 300 N

Given

0.25 meters wide and 1.5 meters long

Pressure = 800 Pa

Required

Force

Solution

P = F/A

A = 0.25 x 1.5

A = 0.375 m²

P = 800 Pa = 800 N/m²

Input the value :

F = P x A

F = 800 N/m² x 0.375 m²

F = 300 N

A cyclist starts pedalling his bicycle from rest and achieves an angular speed of 5 revolutions in 8 seconds. Afterwards, he stops pedalling and lets the bicycle move slowly before coming to a complete stop in 12 seconds. The wheels complete approximately 8.75 revolutions in total during the entire motion.

To determine the total number of revolutions of the wheels, we need to consider both periods: acceleration and deceleration.
During the acceleration phase (0 to 8 seconds), the cyclist completes 5 revolutions. Now we need to calculate the number of revolutions during the deceleration phase (8 to 20 seconds).
Assuming uniform deceleration, the angular speed decreases linearly from 5 revolutions in 8 seconds to 0 revolutions in 12 seconds. The average angular speed during the deceleration phase can be calculated as (5 + 0) / 2 = 2.5 revolutions per 8 seconds.
Now, to find the number of revolutions in the 12-second deceleration period, we can use the proportion:
2.5 revolutions / 8 seconds = x revolutions / 12 seconds
Solving for x, we get:
x = (2.5 * 12) / 8 = 3.75 revolutions
Adding the revolutions during both phases, we get the total number of revolutions of the wheels:
5 revolutions (acceleration) + 3.75 revolutions (deceleration) = 8.75 revolutions

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The media is not prioritizing the issue of child poverty, leading to a lack of awareness among the American public.

This is an example of media bias. The media has the power to influence public opinion by choosing which stories to cover and how to frame them. If they choose not to report on the issue of child poverty, it can contribute to a lack of public awareness and action on the issue.

                            This lack of coverage can also be seen as a form of systemic inequality, as it disproportionately affects marginalized communities who may not have the resources to advocate for themselves in the media.
                          This is an example of the operation of agenda-setting. Agenda-setting refers to the media's ability to influence what topics are considered important by the public, based on the amount and prominence of coverage given to those topics. In this case, the media is not prioritizing the issue of child poverty, leading to a lack of awareness among the American public.

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Answer:

The trees would remove more carbon from the atmosphere.

Explanation:

I just completed the test, and got a 100%.

When they meet the 40-kg boy would have moved a distance of 6 m.

Apply the principle of center mass;

Take the 40 kg mass as the reference point;

X(40 kg) = (40kg x 0  + 60kg x 10 m)/(40 kg + 60 kg)

X(40 kg) = (600)/(100)

X(40 kg) = 6 m

Thus, when they meet the 40-kg boy would have moved a distance of 6 m.

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Answer:

Explanation:

Incandescent bulbs are extremely inefficient because 90% of the energy is wasted as heat, with only 10% being converted to visible light. This gives incandescent bulbs a luminous efficiency rating of around 2%. Ultimately, incandescent bulbs perform better as heaters than as light sources.

The frequency of the waves is 0.25 Hz.

Time Period (T) is the number of seconds per waveform or the number of seconds per oscillation. It is clear that the frequency and time period are reciprocals.

So, the frequency, f = 1/T

Given time period = 4s

Putting this value in above equation we get f = 0.25 Hz.

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The uncertainty in velocity is given as ±1 percent of v.Δv = ± (1/100) × v = ± 6.37 m/s, the minimum uncertainty in position of the bullet is 7.1 × 10^-35 m in the first case and 1.4 × 10^-30 m in the second case.

In physics, Heisenberg's uncertainty principle states that the position and velocity of a particle cannot be determined simultaneously to a high degree of accuracy. The uncertainty principle is stated mathematically as:

Δx. Δp ≥ h/2π, where Δx is the uncertainty in position, Δp is the uncertainty in momentum, and h is Planck's constant.

In this question, we are given the mass (m) of the bullet as 22.9 g and the velocity (v) as 637 m/s. We are also given the uncertainty in velocity (Δv) in two different cases.

(a) In the first case, the uncertainty in velocity is given as ±1 percent of v.Δv = ± (1/100) × v = ± 6.37 m/s

(b) In the second case, the uncertainty in velocity is given as ±0.01 percent of v.Δv = ± (0.01/100) × v = ± 0.0637 m/s

(a) Now, using the uncertainty principle, we can calculate the minimum uncertainty in position:

Δx.Δp ≥ h/2π

Δp = m.Δv

Δp = (22.9/1000) kg × 6.37 m/s = 0.146 kg·m/s

Δx ≥ h/2π.

ΔpΔx ≥ (6.626 × 10^-34 J·s)/(2π × 0.146 kg·m/s)

Δx ≥ 7.1 × 10^-35 m

(b) Using the same formula as above, we can calculate the minimum uncertainty in position for the second case:

Δp = m.Δv

Δp = (22.9/1000) kg × 0.0637 m/s = 0.00146 kg·m/s

Δx ≥ h/2π.

ΔpΔx ≥ (6.626 × 10^-34 J·s)/(2π × 0.00146 kg·m/s)

Δx ≥ 1.4 × 10^-30 m

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Answer:

To calculate the magnification of the image formed by a magnifying glass, we can use the formula:

Magnification (M) = Image height (h_i) / Object height (h_o)

However, since the question does not provide information about the heights of the object and the image, we cannot directly calculate the magnification using the given values.

To determine the magnification, we need either the height of the object or the height of the image in order to compare them. Without this information, it is not possible to calculate the magnification accurately.

Explanation:

Answer:

A machine can help decrease the input force and increase the output force.

This is achieved by using a simple machine, such as a ramp, to increase the distance over which the input force is applied. By increasing the distance over which the input force is applied, the amount of force required to move an object is reduced. This is known as mechanical advantage, and it allows a smaller input force to produce a larger output force, making the work easier to do.

For example, if a person needs to lift a heavy object straight up, they would need to apply a large amount of force to lift it. However, if they use a ramp to move the object up a slope, the distance over which the force is applied is increased, making it easier to move the object with less force.

Answer:

mechanical energy

Explanation:

Answer:

When you fill it up its chemical energy but it gets transformed into mechanical energy.

Explanation:

The internal combustion engine, which is utilized in most automobiles, has allowed for the transfer of chemical energy into mechanical energy. This provides locomotion for the vehicle as it is driving.

N=m.g

N=72 x 9.8 = 705.6 ≈ 706 N

Answer:

the ropeless skipping rope and many other

Answer:

Explanation:

The question should be specified.

Answer:

on the body of the container of the chemical and it also on the shelf where the chemical is kept in the laboratory.

Explanation:

The information on the chemical and physical properties of a specific chemical should  be located on the body of the container of the chemical. when storing chemicals in a laboratory the properties, both chemical and physical properties of the chemical should be written out and pasted on the body of the container that contains the chemicals.and also o the shelf where the chemical is kept in the laboratory or workplace .

Convective heat transmission creates the thermal plume of the candle. The main method of heat energy transport in a home or structure is convection.

Three processes—conduction, radiation, and convection—transfer heat from and to objects, including you and your house. Heat transfers through solid materials by conduction. On hot days, heat is transferred into your house through the walls, windows, and roof.

There are three major ways that heat energy can be moved from one location to another. The movement of matter particles carries heat energy in CONVECTION. Particle vibration in CONDUCTION transfers heat. Electromagnetic waves directly transport heat in RADIATION.

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Aswer:

False, the values ​​of the distance traveled and the displacement only coincide when the trayectorie is a straight line. Otherwise, the distance will always be greater than the offset.

Although these terms are used synonymously in other cases, they are totally different. Since the distance that a mobile travels is the equivalent of the length of its trajectory. Whereas, the displacement will be a vector magnitude.

xXCherryCakeXx.

Answer:

Velocity is “how much distance you cover in a particular time.” Space and time are fundamental quantities, and meters and seconds are their base units. Velocity is a combination of a space and a time, and therefore its units — “m/s” – are “derived” from the units for space and time

The rotational kinetic energy of a flywheel increases by 80% when its rotational speed increases by 40%. This is because the rotational kinetic energy of a flywheel is directly proportional to the square of its angular velocity.

The rotational speed of a flywheel increases by 40%. The percentage increase in its rotational kinetic energy is approximately 96.8%. Suppose the initial rotational speed of the flywheel is n1 and the initial rotational kinetic energy is K.E.1. After the speed of the flywheel is increased by 40 percent, the new speed is n2 = n1 + 0.4n1 = 1.4n1.

Then the new kinetic energy K.E.2 of the flywheel is given by K.E.2 = (1/2)I(n2^2)where I is the moment of inertia of the flywheel.Since n2 = 1.4n1, we have \(K.E.2 = (1/2)I(1.96n1^2) = 0.98I(n1^2).\).

Therefore, the percentage increase in the rotational kinetic energy of the flywheel is approximately 96.8%.

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The index of refraction of a substance is: the speed of light in vacuum divided by the speed of light in the substance.

Speed is the rate of movement or action, typically measured in units such as miles per hour or seconds per mile. It can also refer to the rate of change of an object's position over time, or the rate at which an action takes place. In physics, speed is the magnitude of the velocity of an object, or the rate of change of its position. Speed is a scalar quantity, meaning it has magnitude but not direction. It is measured in units such as miles per hour (mph) or meters per second (m/s).

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The correct answer is c. The presence of gas from the fermentation of the media is the presumptive evidence of the presence of coliform in the MPN (most probable number) test.

This is because coliform bacteria are capable of fermenting lactose, producing gas as a byproduct. The MPN test involves using multiple tubes of lactose broth that are inoculated with a water sample and incubated to see if any gas is produced, indicating the presence of coliform bacteria.

The presumptive evidence of the presence of coliform in the MPN test is:

c. The presence of gas from the fermentation of the media

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To determine the distance spanned by the diffraction spot, we need to consider the properties of the diffraction pattern and the given information.

Given:

- The screen is 30 cm behind the fish.

- The entire path of the laser, including the water and tissue, has an index of refraction close to that of water.

- The properties of the diffraction pattern are determined by the wavelength in water.

Since the diffraction pattern is formed by the interaction of light waves with obstacles or apertures, the spot's size or spread depends on factors such as the wavelength of light and the size of the aperture.

Without specific information about the wavelength or aperture size, it is not possible to determine the exact distance spanned by the diffraction spot. Additional details regarding the specific setup or measurements would be necessary to calculate or estimate the distance spanned by the diffraction spot.

Please provide further information or clarify the parameters related to the diffraction setup if you require a more specific answer.

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The flux of the curl of the field F across the given surface S is 108π. To calculate the flux of the curl of the field F across the surface S using Stokes' Theorem, we need to evaluate the surface integral ∬S curl(F) · dS, where curl(F) is the curl of the field F and dS is the outward-pointing vector normal to the surface.

First, we find the curl of the field F:

curl(F) = (curl(F))_x i + (curl(F))_y j + (curl(F))_z k

= (0 - 1) i + (1 - 0) j + (3 - 2) k

= -i + j + k

Next, we parameterize the surface S using the given equation r(r, θ):

r(r, θ) = rcosθ i + rsinθ j + (9 - r^2) k

We calculate the cross product of the partial derivatives of r(r, θ) with respect to r and θ to obtain the normal vector to the surface S:

dS = (∂r/∂r) × (∂r/∂θ) dr dθ

= (cosθ i + sinθ j - 2r k) dr dθ

Now, we evaluate the surface integral:

∬S curl(F) · dS = ∫∫ curl(F) · dS

= ∫∫ (-i + j + k) · (cosθ i + sinθ j - 2r k) dr dθ

= ∫∫ (-cosθ + sinθ - 2r) dr dθ

Integrating with respect to r from 0 to 3 and with respect to θ from 0 to 2π, we obtain:

∫∫ (-cosθ + sinθ - 2r) dr dθ = 108π

Therefore, the flux of the curl of the field F across the surface S is 108π.

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