three importance of measurement​

Answer:

Charging by contact is when the charged object is brought near but never contacted to the object being charged

Explanation:

The efficiency of the process is 42%

From the question given above, the following data were obtained:

Useful energy = 250 watt

Wasteful energy = 600 watt

The efficiency of the process can be obtained as illustrated below:

\(efficiency \: = \frac{useful \: energy}{wasteful \: energy} \times 100 \\ \\ efficiency \: = \frac{250}{600} \times 100 \\ \)

Therefore, the efficiency of the process is 42%

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Answer:

Its actually 29%

Explanation:

Took the Test

Answer:

Study More You will get it :L

Answer:

the answer is D I tought

The point through which this ray will pass, after refraction by the lens is point D.

The refraction of light refers to the bending or change in direction that occurs when light passes from one medium to another. It is a phenomenon that happens due to the difference in the speed of light in different substances.

From the ray diagram given, after the light incident from point O, it will pass the converging at point D which is the focal length of the lens after refraction.

Thus, based on the converging lens given in the ray diagram, we can conclude that, the point through which this ray will pass, after refraction by the lens is point D.

So point D is the correct answer.

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Answer:

f = 8 N

Explanation:

Data provided in the question

Radius of the pulley  = r = 0.05 m

Moment of inertia = (I) = 0.2 kg.m^{2}

Angular acceleration = ∝ = 2 rad/sec

Based on the above information

As we know that

Torque is

\(= force \times radius\)

\(= f \times r\)

And,

Torque is also

\(= moment\ of\ inertia \times angular\ acceleration\)

\(= I \times \alpha\)

So,

We can say that

\(f \times r = I \times \alpha\)

\(f \times 0.05 = 0.2 \times 2\)

0.05f = 0.4

f = 8 N

We simply applied the above formulas

Answer:

66.6N

Explanation:

Step one;

given data

the mass of the lamp = 200N

we are told that it is suspended by 3 cables.

Now we know that the weight will be distributed equally on the cables

Step two:

so, let the tension in each cable be T

T+T+T= 200

3T=200

T=200/3

T=66.6N

The tenion on each cable is 66.6N

Answer:

at least put the sentences in the Ques. smh

Explanation:

Answer:

B-The world’s largest pancake griddle is located in Penn Yan, NY, and measures 27 feet from end to end.

Explanation:

i got it right on my test

The potential energy of the lemming when it lands is 0.9108672 J.

To determine the potential energy (PE) of the lemming when it lands, we need to consider the conservation of energy. The potential energy of an object is given by the formula PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height.

Given:

Mass of the lemming (m) = 0.0780 kg

Height of the cliff (h) = 5.36 m

First, let's calculate the potential energy when the lemming is on the cliff. Using the given formula, we have:

PE = mgh

PE = 0.0780 kg * 9.8 m/s² * 5.36 m

PE = 0.413616 J

Next, we need to determine the final kinetic energy of the lemming just before it lands. We can use the equation for kinetic energy (KE) given by KE = (1/2)mv², where v is the velocity of the lemming.

Given:

Velocity of the lemming (v) = 4.84 m/s

Calculating the kinetic energy, we have:

KE = (1/2) * 0.0780 kg * (4.84 m/s)²

KE = 0.9108672 J

According to the conservation of energy, the potential energy at the top of the cliff is equal to the kinetic energy just before landing.

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Answer:

D

Explanation:

In a series circuit there is only one path for the current to complete the path....so D

Answer:

The only form of energy a cell can use is a molecule called adenosine triphosphate (ATP). Chemical energy is stored in the bonds that hold the molecule together.

Explanation:

hope it helps

Explanation:

Here is the first one....you should try the second one...

Simpson will it take 112 / 17 km to drive 560 km on a perfectly straight highway.

You can replace this computation with d = rt, which stands for "distance equals rate times time." To calculate speed or rate, use the speed formula, s = d/t, which asserts that speed is equal to distance divided by time.

The difference between speed and velocity is the amount of distance an object covers in a given amount of time and in a certain direction. Speed is a scalar quantity while velocity is a vector.

We know that:

v = 85

d = 560

Substitute

v = 85

d = 560 into formula d = v x t  :

560 = 85t

Cross out the common factor: 112 / 17 km

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The given statement about “The nucleus was discovered by Rutherford when this occurred to the alpha particles shot at gold foil in his laboratory.” is true, because in his famous experiment, alpha particles were seen to scatter away from a gold foil in the reverse direction.

In the Rutherford model, the atom is described as having a small, dense, positively charged core known as a nucleus, in which nearly all of the mass is concentrated, and around which the light, negative constituents known as electrons circulate at some distance, similar to how planets revolve around the sun at a certain distance. Under the guidance of Rutherford and German physicist Hans Geiger in 1909, Ernest Marsden, conducted a series of experiments that revealed the scattering of alpha particles from thin gold foil. This resulted in the hypothesis that the nucleus was small and dense.

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A kangaroo has to move vertically at least 8.34 m/s in order to leap over a 1.8 m-high object.

Determine the vertical circular motion's radius, measured in metres, and the approximate centripetal acceleration brought on by gravity, measured in metres per second squared. Step 2: Use the formula vmin=rg v min = r g to determine the object's minimum speed (the speed at the top of the circle).

(mass of kangaroo) x (acceleration due to gravity) x (height of the object) = 0.5 x (mass of kangaroo) x (minimum vertical speed)²

Canceling out the mass of the kangaroo on both sides, we get:

9.8 m/s² x 1.8 m = 0.5 x (minimum vertical speed)²

Solving for the minimum vertical speed, we get:

minimum vertical speed = sqrt((2 x 9.8 m/s² x 1.8 m)/0.5) = 8.34 m/s (rounded to two decimal places).

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The time period of the charged particle is 2.093x 10⁻⁷s.

Cyclotron is a device which is used to accelerate heavy charged particles proton, deuteron, He nucleus, etc.

Here,

Charge of the particle, q = 7.5x 10⁻¹³ C

Mass of the particle, m = 2.5x 10⁻²¹ kg

Radius, r = 14x 10⁻² m

Magnetic field, B = 0.1 T

Time period of the charged particle,

T = 2\(\pi\)m/qB

T = (2\(\pi\)x 2.5x 10⁻²¹)/(7.5x 10⁻¹³x 0.1)

T = 2.093x 10⁻⁷ s

Hence,

The time period of the charged particle is 2.093x 10⁻⁷s.

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The flux through the circle loop of wire is determined as 7.96 N/C.m².

The flux through the circle loop of wire is calculated by applying the following formula.

Ф = EA cosθ

where;

The area of the wire is calculated as follows;

A = πr²

A = π (2 m)²

A = 12.57 m²

The flux through the circle loop of wire is calculated as;

Ф = EA cosθ

Ф = 1.5 x 12.57 x cos (65)

Ф = 7.96 N/C.m²

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According to the information, the rms speed of the gas will remain unchanged.

The rms (root-mean-square) speed of a gas is directly proportional to the square root of its temperature. In this scenario, the temperature is constant, which means that the rms speed of the gas will also remain constant.

The change in volume does not have a direct effect on the rms speed of the gas, as long as the temperature remains unchanged. Therefore, the rms speed of the gas in the vessel will not change.

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Answer:

In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.

In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.

The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.

So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.

The lengths of the other bars on the set of they have frequencies of 220 Hz, 264 Hz, 330 Hz, 396 Hz, and 440 Hz would be 27.0 cm, 22.7 cm, 18.2 cm, 15.0 cm,  and 13.6 cm. respectively.

The fundamental frequency of a vibrating bar is inversely proportional to its length, so we can use the following formula to calculate the length of each bar in the set:

L = L₀ × f₀ / f

where L₀ is the length of the longest bar (30.0 cm), f₀ is its fundamental frequency (198 Hz), f is the frequency of the bar we want to find, and L is the length of that bar.

(a) For a frequency of 220 Hz:

L = L₀ × f₀ / f = 30.0 cm × 198 Hz / 220 Hz ≈ 27.0 cm

So the length of the bar that produces a frequency of 220 Hz is approximately 27.0 cm.

(b) For a frequency of 264 Hz:

L = L₀ × f₀ / f = 30.0 cm × 198 Hz / 264 Hz ≈ 22.7 cm

So the length of the bar that produces a frequency of 264 Hz is approximately 22.7 cm.

(c) For a frequency of 330 Hz:

L = L₀ × f₀ / f = 30.0 cm × 198 Hz / 330 Hz ≈ 18.2 cm

(d) For a frequency of 396 Hz:

L = L₀ × f₀ / f = 30.0 cm × 198 Hz / 396 Hz ≈ 15.0 cm

(e) For a frequency of 440 Hz:

L = L₀ × f₀ / f = 30.0 cm × 198 Hz / 440 Hz ≈ 13.6 cm

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Tension in the left cable is 4395.9 N.

Tension is defined as a pulling force that acts along the length of a flexible medium like rope or cables.

Here,

The total mass of the riders is given, m = 330 kg

Let the tension in the left cable be T₁ and that in the right cable be T₂.

From the figure,

T₁ cos 15 = T₂ cos 26

T₁ = T₂ cos 26/cos 15

Also,

T₁ sin15 + T₂ sin 26 = mg

Substituting values,

(T₂ cos 26/cos 15) sin 15 + T₂ sin 26 = 330x 9.8

0.241 T₂ + 0.438 T₂ = 3234

0.679 T₂ = 3234

T₂ = 4762.8 N

Therefore, Tension in the left cable, T₁ = 0.930x 4762.8

         T₁ = 4395.9 N

Hence, The tension in the left cable is 4395.9 N

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Your question was incomplete. Attaching the image here.

Answer:

Explanation:

The electric flux through a surface is given by the dot product of the electric field and the area vector of the surface:

Φ = E · A

where Φ is the electric flux, E is the electric field, and A is the area vector of the surface.

(a) If the surface lies in the yz plane, its area vector is in the x direction. Therefore, the area vector can be written as A = Ax i, where Ax is the magnitude of the area. The electric field is given as E = ai + bj. Therefore, the flux through the surface is:

Φ = E · A = (ai + bj) · (Ax i) = aAx

(b) If the surface lies in the xz plane, its area vector is in the y direction. Therefore, the area vector can be written as A = Ay j, where Ay is the magnitude of the area. The electric field is given as E = ai + bj. Therefore, the flux through the surface is:

Φ = E · A = (ai + bj) · (Ay j) = bAy

(c) If the surface lies in the xy plane, its area vector is in the z direction. Therefore, the area vector can be written as A = Az k, where Az is the magnitude of the area. The electric field is given as E = ai + bj. Therefore, the flux through the surface is:

Φ = E · A = (ai + bj) · (Az k) = 0

since the dot product of perpendicular vectors is zero.

Answer:

Rahman was a little bit 5AM but I think he was just try and the guy was the one who just got a a??ze and you know how are you to me that you

Based on the diagram, the correct statement is: Government and consumers make economic decisions in a mixed economy, while consumers make economic decisions in a market economy.

In a mixed economy, economic decisions are made by both the government and consumers.

The government plays a significant role in regulating and influencing economic activities through policies, regulations, and interventions.

In market economy, economic decisions are primarily made by consumers. The market forces of supply and demand dictate the allocation of resources, production levels, and pricing.

The freedom to buy and sell whatever they choose is what ultimately determines how commodities and services are produced and distributed.

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The magnitude of the applied force and the mass of the object, together determine how an object's motion will change in response to the applied force.

When describing the effect of an applied force on an object's motion, two important factors to consider are:

Magnitude of the Force: The magnitude or strength of the applied force determines the amount of acceleration or deceleration experienced by the object. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. A greater force will result in a greater acceleration, while a smaller force will result in a smaller acceleration. Additionally, the direction of the force relative to the object's initial motion will determine if it speeds up, slows down, or changes direction.

Mass of the Object: The mass of the object being acted upon is another crucial factor. As mentioned earlier, according to Newton's second law, the acceleration of an object is inversely proportional to its mass. This means that for a given force, an object with a larger mass will experience a smaller acceleration compared to an object with a smaller mass. In simpler terms, it requires more force to accelerate a heavier object compared to a lighter object.

These two factors, the magnitude of the applied force and the mass of the object, together determine how an object's motion will change in response to the applied force.

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A 150-g metallic rod with a specific heat of 0.11 cal/g.°C absorbs 82.5 calories of heat and its temperature increases from 20 °C to 25 °C.

It is the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).

A metallic rod of mass 150 g (m) absorbs 82.5 cal of heat (Q) and its temperature raises from 20 °C to 25 °C. We can calculate the specific heat (c) of the metal using the following expression.

Q = c × m × ΔT

c = Q / m × ΔT

c = 82.5 cal / 150 g × (25 °C - 20 °C) = 0.11 cal/g.°C

A 150-g metallic rod with a specific heat of 0.11 cal/g.°C absorbs 82.5 calories of heat and its temperature increases from 20 °C to 25 °C.

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Answer:

B

Explanation: Because conduction is when an object touches another object and convection happens with boiling water or the water cycle, the particles/water fall and rise.

Answer:

D

Explanation: