two drivers make 100-km trips. Driver 1 complets the trip in 2 hours. Driver 2 takes 3 hours but stops for an hour halfway. which driver has a greater average speed? Explane

Our brain compensates when we see two squares far away from one another

Surprisingly, the answer is that squares A and B are the same color, but that your perception of them as different is based on the information about the surrounding colours and shadows.

Professor Bloom claims that this bias results from the brain trying to make up for two squares that are far apart, which he claims is the reason why two squares appear to have different colours when they are actually the same.

Because they absorb some colours (wavelengths) while reflecting or transmitting others, objects appear to be different colors. Our perception of colour is based on the wavelengths that are reflected or transmitted.

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Answer:

They were pleased by the news. (passive voice)

The news pleased them. (active voice)

Yes, an observer on the Moon would always see the same face of Earth. This phenomenon is known as tidal locking.

The Moon is tidally locked to Earth, which means that its rotation period and revolution period are approximately the same. The Moon takes about 27.3 days to complete one revolution around Earth and also takes about 27.3 days to complete one rotation on its axis.

Due to this synchronization, the same side of the Moon always faces Earth.

Similarly, if you were on the Moon, you would also always see the same face of Earth. This means that one side of Earth would always be visible to you while the other side would be permanently hidden from view.

However, it's important to note that this does not mean that the Moon is completely stationary.

The Moon does have some libration, which allows observers on Earth to see a small amount of the Moon's far side over time. But from the Moon's perspective, it would still always see the same face of Earth.

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A platinum coil turns becomes a superconductor when immersed in liquid helium at a temperature of 4 kelvin.

Energy from the outside is captured by the circulating fluid running through the coils, which then releases it through the interior coils into the building's interior. Superconductors have no electrical resistance as well as perfect diamagnetism. Cooper pairs of electrons are what cause superconductivity. The BCS theory, so named in honour of its three discoverers, describes how materials transform into "superb conductors" when their internal electrons cooperate to form Cooper pairs (or BCS pairs). When cooled to extremely low temperatures (near absolute zero, or roughly -273° Celsius), conductors completely lose all of their electrical resistance.

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Answer:

amplitude

Explanation:

Answer:

This level of needs is known as safety needs. Safety needs are the need for security, stability, and protection from physical and emotional harm. These needs include physical safety, financial security, health and well-being, and protection from discrimination and harassment.

Explanation:

Answer:

64.4 m

Explanation:

First, find how long it takes to land.  Given in the y direction:

Δy = 0 m

v₀ = 27 m/s sin 60° ≈ 23.4 m/s

a = -9.8 m/s²

Find: t

Δy = v₀ t + ½ at²

0 m = (23.4 m/s) t + ½ (-9.8 m/s²) t²

t = 4.77 s

Next, find how far it travels in that time.  Given in the x direction:

v₀ = 27 m/s cos 60° = 13.5 m/s

a = 0 m/s²

t = 4.77 s

Find: Δx

Δx = v₀ t + ½ at²

Δx = (13.5 m/s) (4.77 s) + ½ (0 m/s²) (4.77 s)²

Δx = 64.4 m

Answer:

A

Explanation:

As u will divide the sound of air with The length which is also the alternative formula for calculating frequency

Students watched a cartoon either alone or with others and then rated how funny they found the cartoon to be.

Independent Variable:  student alone or with others

Dependent Variable:   how funny student thought the cartoon was

Answer:

Independent Variable: Watching cartoon alone or with others

Dependent Variable: how funny they found the cartoon to be

Explanation:

A dependent variable is the variable being tested. The change in the value of dependent variable depends on the independent variable.

An independent variable is used to test the effects on dependent variable and its does not depend on any variable.

In the above example the dependent variable is how funny the cartoon was. This is being tested and it is tested by independent variable i.e. Students watching cartoon either alone or with others. So the cartoon is funny or not depends on watching cartoon alone or with friends.

A lever to lift an object that weighs 500N. The lever exerts the output force 1 m from the fulcrum.

To solve this problem, we can use the formula for the mechanical advantage of a lever

Mechanical Advantage = Output Force / Input Force

We know that the output force is 500 N and the input force is 250 N. Therefore, the mechanical advantage is

Mechanical Advantage = 500 N / 250 N

Mechanical Advantage = 2

Next, we can use the formula for the distance from the fulcrum to the input force

Distance from fulcrum to input force = Output Force distance / Mechanical Advantage

We know that the output force distance is 1 m. Therefore, the distance from the fulcrum to the input force is

Distance from fulcrum to input force = 1 m / 2

Distance from fulcrum to input force = 0.5 m

Hence, an effort force of 250 N must be applied 0.5 m from the fulcrum to lift the object that weighs 500N.

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Answer:

32.5

Explanation:

Choose the normal force acting between the object and the ground. Let's assume a normal force of 250 N .

Determine the friction coefficient. ...

Multiply these values by each other: (250 N) * 0.13 = 32.5 N .

You just found the force of friction!

Temperature in Kelvin will be : K = 27 + 273.15 = 300.15

Mass in milligram will be : 20 x 100 = 2000 milligrams

Distance in decimeter : 3 x 10 = 30 decimeter

We have -

We have to -

To convert -

According to the question -

Temperature in Kelvin will be : K = 27 + 273.15 = 300.15

Mass in milligram will be : 20 x 100 = 2000 milligrams

Distance in decimeter : 3 x 10 = 30 decimeter

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Answer:

B ) He was the first to systematically study force and motion.

Explanation:

I seen this one before and know the answer since there's 4 options

The energy of the wavelength of the photon is 258 m.

Given:

f = 1160 kHz = 1160 x 10³ Hz

The velocity is c = 3 x 10⁸ m/s, the velocity of light (approximately).

The reflectance curve for a white piece of paper would reflect Long, medium and short wavelengths equally.

white piece paper serves as perfectly reflective surfaces and reflects all the incident radiations without any absorbtion or transmission. Hence a white piece of paper would reflect Long, medium and short wavelengths equally.

ultra violet rays has larger wavelength than radio waves.

As we know that the energy is inversely proportional to the wavelength.

The energy of radio waves is more than the energy of ultra violet waves.

Energy of ultra violet photons < Energy of radio waves

Wavelength of ultra violet photons > Wavelength of radio waves

Wavelength(lambda) is the distance between one peak to the next peak or one trough to another trough parallel to the direction of propagation.

Calculate the wavelength, λ.

V = f λ

V is the speed

F is the frequency  

F λ is wavelength  

c = fλ

λ = c/f = (3 x 10⁸ m/s)/(1160 x 10³ 1/s) = 258 m

Therefore the energy of the wavelength of the photon is 258 m.

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[NOTE: THIS QUESTION IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS: What is the wavelength of a radio photon from an "am" radio station that broadcasts at 1160 kilohertz? What is its energy?]

The useful energy output from television is primarily in the form of radiant and thermal energy. A television primarily converts electrical energy into different forms of energy for its operation.

The display of a television produces radiant energy in the form of light. This light is generated by the pixels on the screen that emit photons when electrically stimulated, resulting in the formation of images and colors that we see on the screen. The radiant energy output is what allows us to view the content displayed on the television.

Additionally, a television also generates thermal energy or heat during its operation. This is primarily a byproduct of the energy conversion processes that occur within the television components, such as the power supply, circuitry, and display. These components consume electrical energy and produce heat as a result of inefficiencies in the conversion process. The thermal energy generated by a television contributes to the overall heat dissipation, which needs to be managed to prevent overheating.

In summary, a television primarily outputs useful energy in the form of radiant energy for display and thermal energy or heat as a byproduct of its operation.

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The thermal expansion coefficient of concrete is typically around 3.5 × \(10^{-5\)  /°C. Using this value and assuming that the temperature increase is in Celsius, the change in length is 4,500 m.

We can calculate the change in length of the spans as follows:

ΔL = αL * ΔT

here α is the thermal expansion coefficient of concrete, L is the length of the span, and ΔT is the temperature increase in Celsius.

We know that the length of the span is 180 m, and the temperature increase is 20°C. Substituting these values into the equation, we get:

ΔL = 3.5 × \(10^{-5\) * 180 m * 20°C

= 4,500 m

To find the height to which the spans rise when they buckle, we need to know the shape of the buckling and the distance between the supports.

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ANSWER:

500 J

STEP-BY-STEP EXPLANATION:

Given:

Mass of object = 10 kg

Speed = 10 m/s

The kinetic energy is calculated using the following formula:

The kinetic energy is 500 J.

Answer:

Cohesion

Explanation:

Cohesion is the force responsible for holding the molecules of water together.

Adhesion is type of force between two different molecules or compounds.

Surface tension allows water molecules or molecules to resist any external force "due" to cohesive forces.

\(\rule[225]{225}{2}\)

Hope this helped!

Answer:

The answer is below

Explanation:

There are various reasons for a power station not to work at maximum output all the time. These includes technical constraints, such as

1.  Availability of the plant: sometimes the availability of generating plants may affect capacity factor, which may be caused due to plant part break down, or routine servicing.

2.   Economic reasons: the capacity factor of a generating plant can be affected due to the level of usage at peak performance, as the cost of running the plant at peak form may be expensive to maintain.

3.  Availability of the energy resource: this often applicable to generating plants using renewable energy, this is because, energy source such as wind, solar and water may not be readily available all the year round as they can be seasonal. Also, the maximum output can be affected even if the generating plant is using non renewable energy, as there maybe some times, unavailability or low supply of the crude oil or fossil fuel.

Also, the main reason in which the capacity factor for non-renewables is always higher than for renewables, is because of the availability factor, or availability of the energy resources. This is because renewable energy such as water, wind, and solar are not readily available all the time, and are subject to atmospheric conditions, unlike non renewable energy such as crude oil, which can be readily available by purchasing them.

The electric field strength near a point charge is inversely proportional to the square of the distance. Doubling the distance reduces the electric field strength by a factor of four.

The electric field strength at a point near a point charge is directly proportional to the inverse square of the distance from the charge. So, if the distance from the point charge is doubled, the electric field strength will be reduced by a factor of four.

Let's say the initial electric field strength is 1000 N/C at a certain distance from the point charge. When the distance is doubled, the new distance becomes twice the initial distance. Using the inverse square relationship, the new electric field strength can be calculated as follows:

The inverse square relationship states that if the distance is doubled, the electric field strength is reduced by a factor of four. Mathematically, this can be represented as:
(new electric field strength) = (initial electric field strength) / (2²)

Substituting the given values:
(new electric field strength) = 1000 N/C / (2²)
                          = 1000 N/C / 4
                          = 250 N/C

Therefore, if the distance from the point charge is doubled, the electric field strength will be 250 N/C.

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Answer: The battery in circuit 3 would run out more quickly when the switches are closed because the two bulbs are brighter, which means the battery is providing more energy to that circuit.

Explanation: Answer from plato

Answer:

b. compensate for changes in the Earth's atmosphere and achieve better resolution.

Explanation:

Answer:

450N

Explanation:

Given data

Mass m= 75kg

Acceleration= 6m/s^2

From the Newtons first law, F=ma

substitute

F=75*6

F= 450N

Hence the force is 450N

The energy of the flywheel can be calculated using the equation E = \(0.5Iw^2\), where I is the moment of inertia and ω is the angular velocity.

For a flywheel with a radius of 1m and mass of 500kg, the moment of inertia is\(500 x (1m)^2 = 500 kg-m2.\) The angular velocity is 500 revolutions per minute, which is equivalent to 8.667 rad/s. Plugging these values into the equation gives us \(E = 0.5 x 500 x (8.667)^2 = 35,584.7 J.\)

The energy of a flywheel is the energy stored in the kinetic form due to its rotation. It is defined as the product of the moment of inertia and the square of the angular velocity of the flywheel.

The energy stored in the flywheel is proportional to the square of the angular velocity and is also proportional to the moment of inertia. The greater the angular velocity, the more energy is stored in the flywheel.

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Answer:

One possible reason is that change in velocity is greater for the individual with lower mass.

Explanation:

By Newton's Law of Mechanics, magnitude of the force on two players would be the same in the collision. Let \(F\) denote this magnitude.

Assume that the duration of the collision is \(\Delta t\). In this collision, magnitude of the impulse \(J\) on each player would be the same: \(J = F\, \Delta t\).

At the same time, impulse is equal to the change in momentum. Specifically, if the mass of one player is \(m\) and the change in their velocity is \(\Delta v\), the change in their momentum would be \(m\, \Delta v\). Thus:

\(m\, \Delta v = J = F\, \Delta t\).

Rearrange to obtain an expression for the change in velocity:

\(\begin{aligned}\Delta v &= \frac{J}{m} = \frac{F\, \Delta t}{m}\end{aligned}\).

In other words, in this collision, change in velocity is inversely proportional to the mass of the participant. Hence, even though the two players experienced force of the same magnitude, the participant with a lower mass would experience a greater change in velocity.

Ohm's Law is V = IR, where V is voltage, I is current, and R is resistance. To find the current passing through a wire when the 10 V is placed across a wire with 50 Ohms, we need to use the formula I = V/R.

So, I = 10 V / 50 Ω = 0.2 A. Therefore, the current passing through a wire when the 10 V is placed across a wire with 50 Ohms is 0.2 A.If voltage is slowly increased, the current flow will also increase, as per Ohm's law I = V/R. The current will increase proportionally as long as the resistance remains constant.

If the resistance changes with respect to the voltage, then the current flow will change differently. For example, if the voltage increases and the resistance also increases proportionally, then the current flow will remain the same.

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