Help me with this pls I will make brainlest

The right response is = D. Wave A : low frequency wave, B: high frequency wave.

Frequency is described as the quantity of oscillations or cycles per unit of time. Many physical phenomena, including sound waves, mechanical vibrations, and electromagnetic radiation (including radio waves and light), exhibit frequency.

Compared to high frequency waves, low frequency waves have a longer wavelength and a lower frequency. High frequency waves are often linked to smaller, faster-moving phenomena, whereas they are typically connected to larger, slower-moving phenomena. For example, low frequency waves, which have a lower pitch and are connected to larger objects that vibrate more slowly, like bass notes in music or the rumble of thunder, are examples of sound waves. High frequency waves, like the whistle or bird tweeting, are connected with smaller, faster vibrating objects and have a higher pitch.

High frequency waves, like X-rays, gamma rays, and visible light, have shorter wavelengths and higher energies. These waves are frequently employed in radiation therapy, medical imaging, and other applications that call for high intensity radiation.

Generally, a wave's frequency is a key characteristic that affects how it behaves and may be used in a variety of physics and engineering domains.

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Answer:

Ionic bonds are formed between cation and anions . A cation is formed when a metal ion loses valence electron while an anion is formed when a non-metal gains a valence electron.

Answer:

1.school and community helps in growth and development of you social health as when u learn how to be compatible with the people around you, you will do better in life

2. by trying and solving

by not giving

by innovating

by being motivated

BY KNOWING THAT U CAN DO IT

Answer:

K. E= 1/2MV²

125 = 1/2M5²

multiply both side by 2

250 = 25M

M= 10kg

Answer:

The correct option is D

Explanation:

Generally, thermal and electrical conductivity is affected by valence electrons in an atom. These valence electrons carry electric charges (or conduct heat as the case may be) throughout the atom. The fewer the valence electrons, the higher its conductivity - this is as a result of free movement within the atom. The higher the valence electrons, the lesser its conductivity and when the outermost electrons have completely filled the outermost shell, the atom would be an insulator as there won't be carriers of electric charges.

Hence, from the above, sodium would be expected to have the highest electrical and  thermal conductivity because it has just one electron in it's outermost shell

Answer:D

Explanation: got it right

...

Explanation:

.................

Answer:

Solution given:

t=\(2π \sqrt{\frac{m}{g}}\)

where

t=time and it's dimension is [T¹]

m=mass and its dimension is [M¹]

dimension of constant term is nothing.

t=\(2π \sqrt{\frac{m}{g}}\)

squaring on both side

we get

t²=4π²*\(\frac{m}{k}\)

since 4π² has no dimension

Dimension of t²=[T²]

Dimension of m=[M¹]

Dimension of k=?

By using

The principle of homogeneity of dimension we get

Dimension of t²=dimension of \(\frac{m}{k}\)

[T²]=\(\frac{[M¹]}{K}\)

doing crisscrossed multiplication

K=\(\frac{[M¹]}{[T²]}\)

dimension of k is\( [M¹T^{-2}] \)or \([M¹L^0T^{-2}]\)

since length is absent

Answer:

1. True 2.0

Explanation:

1. When balanced forces are acting on an object, they have a constant velocity, meaning that the velocity remains the same.

2. When an object begins at a starting point and returns back to that same starting point, its displacement would be 0.

I'm pretty confident in these answers, however, you must have studied this more than me, so let me know if you have any questions or concerns at all, I'll be glad to help. :)

To determine the hole concentration under the given condition, we need to make use of the concept of conductivity and its relation to carrier concentration.

In part (b), the conductivity was mentioned, but the actual value was not provided. Let's denote the conductivity of silicon in part (b) as σ(b) and the corresponding hole concentration as p(b).

Now, if the silicon is under illumination and the conductivity doubles, we can denote the new conductivity as 2σ(b). According to the relationship between conductivity and carrier concentration in an intrinsic semiconductor, σ = qμn, where q is the charge of an electron or hole and μ is the mobility of the charge carriers.

Since silicon is a p-type semiconductor, the conductivity is dominated by the holes. Therefore, we can write:

2σ(b) = qμp

Given that the conductivity doubles, the new hole concentration p' can be determined by:

2σ(b) = qμp'

p' = (2σ(b))/(qμ)

Please provide the value of the conductivity σ(b) in order to calculate the hole concentration p'.

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If you were standing on the far side of the moon, you would never be able to see the Earth.

The moon is tidally locked to Earth, which means that the same side of the moon always faces Earth. This is why we only ever see one side of the moon from Earth. Similarly, if you were standing on the far side of the moon, the Earth would always be blocked from view by the moon itself. So, no matter where you stood on the far side of the moon, you would never be able to see the Earth.

In addition, there are no other objects in space that would consistently block the view of the Earth from the far side of the moon. So, the only thing preventing you from seeing the Earth would be the moon itself.

Overall, standing on the far side of the moon would offer a unique and breathtaking view of the universe, but unfortunately, the Earth would not be visible from that vantage point.

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The change in internal energy of the system after the heat is added and the system expands doing work to the surrounding is 45 J.

The change in internal energy of the system is determined by applying the first law of thermodynamics as shown below;

ΔU = q - w

where;

ΔU = 134 J - 89 J

ΔU = 45 J

Thus, the change in internal energy of the system after the heat is added and the system expands doing work to the surrounding is 45 J.

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Answer:

Nonmetals gain

while metals lose

Answer:

30. $3.85

31. $2.22

Explanation:

30. The time duration of the kitchen clock is left on = All day = 24 hours

The power rating of the kitchen clock, P = 4 watts

The electricity cost in Alberta, R = $0.11 per kilowatt hour

The total number of hours the kitchen clock is on during the year, 't', is given as follows;

t = Number of hours per day × Number of days per year

∴ t = 24 hours/day × 365 days/year = 8,760 hours

The energy consumption of the kitchen clock, per year, E = P × t

∴ E = 4 watts × 8,760 hours = 35,040 watts-hour = 35.040 kw·h

The cost of operating the clock in one year, C = E × R

∴ Operating cost for the kitchen clock

∴ C = 35.040 kw·h × $0.11/(kw·h) = $3.8544 ≈ $3.85

The cost of operating the clock in one year, C ≈ $3.85

31. The power rating of the ghetto blaster, P = 28 watts

The time duration the ghetto blaster was on during an average month = All day = 24 hours

The number of days during an average month, n = 30 days

The cost of electricity in Alberta, R = $0.11 per kilowatt hour

The time in hours the ghetto blaster was on, t = 30 days/month × 24 hours/day

∴ t = 720 hours per month

The cost of operating the ghetto blaster in one month, C = P × t × R

∴ C = 28 W × 720 hours × 1 kw·h/(1000 w·h)× $0.11/(kw·h) = $2.2176

∴ The cost of operating the ghetto blaster in one month, C ≈ $2.22

The cradle behaves different due to higher force of gravity.

The Newton’s Cradle behave differently on a large planet such as Jupiter because of the higher gravitational force as compared to the earth. We know that the ball in the cradle that we moves upward comes back to hit the other ball due to force of gravity so if the gravity is increased than the ball on the other end did not move on a certain height due to strong force of attraction and may be the motion of the Newton’s Cradle stops or very slow. The gravity of Jupiter is 2.4 times higher than earth.

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When measuring a current through a resistor using a multimeter, the multimeter be connected in series combination

Whether it is an AC current or a DC currents , both can be measured with a multimeter by connecting the meter in series with the resistor ,  in which the current is measured .

Voltage measurement is done by connected with in parallel combination , but in case of current , it can only be measured by connecting in series combination

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Answer:

spin the weals on the train

Explanation:

Answer:

Where is the picture?

All molecules that contain carbon (C) and at least hydrogen (H) atoms is one example until I see what that missing diagram says.

The smallest planet among the inner planets is Mercury. It is the closest planet to the sun and has a diameter of approximately 4,880 km, which is just over one-third the size of Earth.

Mercury is also the second densest planet in the solar system, after Earth.

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The correct answer is C) they both are powered by wind, as hydrokinetic power is generated by the movement of tides and waves. Wind and hydrokinetic power both involve the use of turbines to generate electricity, and both have minimal environmental impacts.

The statement that is not true about wind and hydrokinetic power is "they both are powered by wind. A rotor blade connected to a shaft converts kinetic energy from the wind into mechanical energy. This mechanical energy is used to rotate a shaft. The shaft is connected to a generator, which converts mechanical energy into electrical energy in a wind turbine. Hydrokinetic power, on the other hand, harnesses the energy of moving water, such as ocean waves or tides, and converts it into electricity.

Turbines are used to harness the kinetic energy of moving water and convert it into electrical energy. Thus, statement c) which says that wind and hydrokinetic power both are powered by wind is false as hydrokinetic power uses the energy of moving water.

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Answer:

Below

Explanation:

Specific heat for water = 4.186  J / (g °C)

50 kg = 50 000 grams

50 000 g * 20 C * 4.186 J/(g C) = 4 186 000 J

TO convert from J to calories , divide joules by 4184

 4 186 000 J / 4184 J/ calorie = ~ 1000 calories

Answer: Food

Explanation:

Food is the largest contributor to land pollution.

What is  the Natural Resources Defense Council?

NRDC strives to rid our food, air, water, and household products from toxic chemicals.

40 percent of food produced in the US is trashed each year according to the Natural Resources Defense Council.

Food decomposes anaerobically and releases methane emissions, a greenhouse gas that is 28 times more potent than carbon dioxide over a 100-year period and 84 times more on a 20-year scale , when food waste ends up in landfill.

Worldwide, some percent of greenhouse gas emissions result from food waste alone.

Therefore,

Food is the largest contributor to land pollution.

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The direction of propagation is —z-direction, The peak value of  \(B_0= \frac{E_0}{c}\), the direction of B at location z = 0 and time t = 0 is along  —y-axis.

An electrically charged particle or object creates an electric field, which is the area of space where an electric charge would experience force. Bring another charge into the electric field to observe the electric field, which is present everywhere in space. If the charges are separated enough from one another, the electric field can be practically approximated as zero.

Electric fields are a vector quantity that can be pictured as arrows pointing in the direction of or away from charges. The directions of the lines are either radially outward, away from a positive charge, or radially inward, toward a negative charge.

Part A:

If we write the argument of the cosine function as,

kz +ωt =k(z + ct)

we see that the wave is traveling the —z-direction.

Because E and B are perpendicular to each other and to the direction of propagation, and E is in the x-direction, B can have only y-component, with magnitude \($ B_0= \frac{E_0}{c}\)

Thus, the wave is traveling in the —z-direction.

Part B:

Since, \(E_0 = cB_0\)

⇒ \($ B_0= \frac{E_0}{c}\)

Part C:

\(E_{x_0}\), B and V must be perpendicular to each other, So, B must be along the y-axis. Also, V is in the x—z. So, B will along  —y-axis.

Thus, The direction of propagation is —z-direction, The peak value of  \($ B_0= \frac{E_0}{c}\), the direction of B⃗ at location z = 0 and time t = 0 is along  —y-axis.

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To determine the net force required to accelerate a 20-kg object at 6.0 m/s² on the moon, we need to consider the acceleration due to gravity on the moon and the object's mass.

The acceleration due to gravity on the moon is one-sixth that on Earth. Since the acceleration due to gravity on Earth is approximately 9.81 m/s², the acceleration due to gravity on the moon is (1/6) * 9.81 m/s² ≈ 1.63 m/s².

Now, we can use Newton's second law of motion, F = m * a, to find the net force required for the given acceleration on the moon. Here, m = 20 kg (mass of the object) and a = 6.0 m/s² (desired acceleration).

Net force (F) = 20 kg * 6.0 m/s² = 120 N.

So, the net force required to accelerate a 20-kg object at 6.0 m/s² on the moon is 120 N.

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When thrown from the balloon, the sandbag has a constant horizontal/forward velocity. As the text puts it, "the sandbag continues forward as if it had not been dropped." What this means is that the sandbag has no acceleration in the horizontal plane of motion, so it moves in this direction at a constant speed. So for any time \(t\), the horizontal velocity is given by

\(v_x(t) = 12\dfrac{\rm m}{\rm s}\)

In the vertical plane of motion, the sandbag has no vertical velocity until it's released and allowed to fall. As it's falling, however, the sandbag is being pulled down by gravity and is accelerating with magnitude \(g=9.8\frac{\rm m}{\mathrm s^2}\), so its vertical/downward velocity at time \(t\) is given by

\(v_y(t) = -gt\)

So, after 3 seconds have passed, the sandbag has horizontal velocity \(v_x = 12\frac{\rm m}{\rm s}\) and vertical velocity \(v_y = -g(3\,\mathrm s) = -29.4\frac{\rm m}{\rm s}\). If the question is specifically asking about speed you would just ignore the negative signs.

The tuning fork undergoes 16,080 oscillations in 1 minute.

The frequency of the tuning fork is 268 Hz, which means that it undergoes 268 oscillations per second.

To find out how many oscillations the tuning fork undergoes in 1 minute, we need to convert the frequency from Hz to oscillations per minute.

1 minute is equal to 60 seconds. Therefore, the number of oscillations per minute can be calculated as:

Number of oscillations per minute = (Frequency in Hz) x 60

Number of oscillations per minute = 268 Hz x 60

Number of oscillations per minute = 16,080 oscillations

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Answer:

Temperature: measure of the average kinetic energy of a substance

Internal energy: total potential and kinetic energies of the particles in a substance

Heat: thermal energy that flows from one substance to another

Thermal energy: part of internal energy that can be transferred

Explanation:

Proof for correct answers on edge :)

Answer:

the surface this works out to 9.8 m/s squared.

Answer:

Which eye structure has the greatest effect on light refraction? ... They are the ciliary muscle, which controls the shape of the lens for accommodation, and the iris, the pigmented ring of muscles that regulates the amount of light entering the eye.

Explanation:

When the circuit is first completed, the voltage drop across the capacitor is 0 V. Just after the circuit is completed, the capacitor will act as an open circuit since it is initially uncharged. Therefore, all the voltage will drop across the resistor.

1. Initially, the capacitor is uncharged, which means it has no charge stored in it.
2. When the circuit is completed, the current starts flowing from the emf source through the resistor and towards the capacitor.
3. However, just after the circuit is completed, no time has passed for the capacitor to charge. Therefore, the voltage across the capacitor is still 0 V.
4. As time progresses, the capacitor will start charging and the voltage across it will increase, but just after the circuit is completed, the voltage drop across the capacitor remains 0 V.
Using Ohm's Law, we can find the voltage drop across the resistor: V = IR where I is the current flowing through the circuit.
Using the total resistance of the circuit: R_total = R + R_capacitor
we can find the current: I = ε / R_total
Plugging in the given values:
R_total = 7.40 kΩ + 0.00 kΩ = 7.40 kΩ
I = 100 V / 7.40 kΩ = 0.0135 A
Now we can find the voltage drop across the resistor:
V = IR = 0.0135 A * 7.40 kΩ = 99.9 V
Therefore, the voltage drop across the capacitor is 0 V.

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Answer:

False. Not everything can turn into a black hole. The formation of a black hole requires a massive object, typically a star, to collapse under its own gravity. This collapse causes the object to become so dense that it creates a singularity, a point of infinite density at the center of the black hole, which is surrounded by an event horizon, the point of no return beyond which nothing, not even light, can escape. So, only objects with sufficient mass and gravity can become black holes.

Explanation: