It might be a good idea to talk to your parents about alcohol because:

Answer:

B

Explanation:

I can't explain right now, mabe later.

Two point charges of 2.00 μc and -2.00 μc are 0.100 m apart the electric field at the point midway between the two charges: 7.20 x 10⁵ N/C.

The electric field at the point midway between two point charges can be determined by calculating the electric fields produced by each charge and then summing them up as vectors.

In this case, we have two point charges, +2.00 μC and -2.00 μC, separated by a distance of 0.100 m. Since the charges have the same magnitude but opposite signs, the electric fields they produce at the midpoint will have equal magnitudes but point in opposite directions.

The electric field produced by a point charge is given by the equation: E = k × |q| / r²

where E is the electric field, k is the electrostatic constant, |q| is the magnitude of the charge, and r is the distance between the charge and the point where the field is being calculated.

For the midpoint, the distances from each charge are equal, i.e., r = 0.050 m. Therefore, the electric field produced by each charge is:

E₁ = k × |2.00 μC| / (0.050 m)²

E₂ = k × |-2.00 μC| / (0.050 m)²

Substituting the values and considering the opposite directions of the fields, we have: E = E₁ - E₂

Calculating the magnitudes and taking into account the values of k and the charges, we find:

E = (9.0 x 10⁹ N·m²/C²) × (2.00 μC) / (0.050 m)²

E ≈ 7.20 x 10⁵ N/C

Therefore, the electric field at the point midway between the two charges is approximately 7.20 x 10⁵ N/C.

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Answer:

Subscribe my Gaming channel Sameer Duos

Explanation:

Generally, a seismograph consists of a mass attached to a fixed base. During an earthquake, the base moves and the mass does not. The motion of the base with respect to the mass is commonly transformed into an electrical voltage. The electrical voltage is recorded on paper, magnetic tape, or another recording medium.

The efficiency of the light bulb is 20% (0.20) because it radiates 20 J of light energy for every 100 J of electrical energy supplied to it.

The energy wasted by the light bulb for every 100 J of electrical energy supplied to it is 80 J (100 J - 20 J), as the remaining energy is not converted into light but lost in the form of heat or other inefficiencies.

Efficiency is calculated by dividing the useful output energy by the input energy and multiplying by 100% to get a percentage. In this case, the useful output energy is 20 J, and the input energy is 100 J. So, the efficiency is (20 J / 100 J) * 100% = 20%.

To find the energy wasted, we subtract the useful output energy from the total input energy. In this case, the useful output energy is 20 J, and the total input energy is 100 J. Therefore, the energy wasted is 100 J - 20 J = 80 J. This represents the energy that is not converted into light but instead lost as heat or in other inefficiencies.

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The number of oscillations of the toy in a second is 1.25.

The given parameter:

The frequency of an object is calculated as follows;

\(f = \frac{n}{t} \\\\\)

where;

The number of oscillations of the toy in a second is calculated as follows;

\(1.25 = \frac{n}{1} \\\\n = 1.25\)

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The order of the given frequencies from lowest to loudest at 30 dB is: a. 63 Hz, b. 1,000 Hz, c. 8,000 Hz.

The loudness of a sound is measured in decibels (dB), while the pitch or frequency is measured in hertz (Hz). However, at the same dB level, not all frequencies are perceived as equally loud.

The human ear is more sensitive to frequencies around 1,000 Hz, so a sound at 1,000 Hz needs less intensity to be perceived as loud as sounds at other frequencies.

In this case, all the given frequencies have the same sound intensity level of 30 dB, so the order of loudness depends on their frequency. The frequency of 63 Hz is the lowest and is perceived as less loud than the other two frequencies.

The frequency of 8,000 Hz is the highest and is perceived as the loudest among the given frequencies. Finally, the frequency of 1,000 Hz is in the middle and is perceived as somewhat loud.

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Hard glass is a type of glass characterized by its high resistance to thermal and mechanical stress. It is commonly used in scientific and industrial applications. The components of glass can be classified into formers, intermediates, and modifiers.

Hard glass, also known as borosilicate glass, is a type of glass that possesses high resistance to thermal expansion and mechanical stress. It is composed mainly of silica (SiO2) and boron oxide (B2O3), which act as formers in the glass structure. The formers provide the basic framework of the glass and contribute to its high durability and thermal stability.

In addition to formers, glass can also contain intermediates and modifiers. Intermediates, such as alumina (Al2O3) and magnesia (MgO), help in reducing the melting point of the glass and improve its workability during the manufacturing process. Modifiers, such as sodium oxide (Na2O) and calcium oxide (CaO), alter the properties of the glass, such as its refractive index and chemical resistance.

By combining the right proportions of these components, glassmakers can produce glass with specific characteristics suitable for various applications, ranging from laboratory equipment and optical lenses to household items and industrial containers.

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Answer:

4.5 because just do the math and its 4.5

"Choice-C" is the answer.

The magnitudes of the accelerations of the plastic bead and the glass bead are 1.5 m/s² and 0.88 m/s² respectively.

Mathematically, the electrostatic force between two (2) charges can be calculated by using this formula:

\(F = k\frac{q_1q_2}{r^2}\)

Where:

Since the two charges on the plastic bead and glass bead have opposite sign, the coulomb force between them will be attractive in nature. Thus, the electrostatic force would act along the line joining these two charges.

Substituting the given parameters into the formula, we have;

F = 9 × 10⁹ (-5 × 10⁻⁹ × 18 × 10⁻⁹)/(0.016)²

F = 3.164 × 10⁻³ Newton.

Note: The same electrostatic force would act on the two beads.

For the acceleration of plastic bead, we have:

Acceleration = Force/Mass

Acceleration = 3.164 × 10⁻³/2.1 × 10⁻³

Acceleration = 1.5 m/s².

For the acceleration of glass bead, we have:

Acceleration = Force/Mass

Acceleration = 3.164 × 10⁻³/3.6 × 10⁻³

Acceleration = 0.88 m/s².

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Complete Question:

A 2.1 g plastic bead charged to -5.0 nC and a 3.6 g glass bead charged to 18.0 nC is 1.6 cm apart (center to center). What are the magnitudes of the accelerations of the plastic bead and the glass bead?

The angle separating the two colors in the refracted light can be found using Snell's Law.

Snell's Law states that n₁ * sin(θ₁) = n₂ * sin(θ₂), where n₁ and n₂ are the indices of refraction for the initial and final mediums, and θ₁ and θ₂ are the angles of incidence and refraction, respectively.

In this case, the index of refraction for red light is 1.399 and for blue light is 1.432. The angle of incidence is given as 60.00°.

To find the angle separating the two colors in the refracted light, we need to calculate the angle of refraction for each color.

For red light: n₁ * sin(θ₁) = n₂ * sin(θ₂)
1 * sin(60.00°) = 1.399 * sin(θ₂)
sin(θ₂) = (1 * sin(60.00°)) / 1.399

For blue light: n₁ * sin(θ₁) = n₂ * sin(θ₂)
1 * sin(60.00°) = 1.432 * sin(θ₂)
sin(θ₂) = (1 * sin(60.00°)) / 1.432

Using a scientific calculator, you can calculate the values of sin(θ₂) for both colors.

Finally, subtract the angle of refraction for red light from the angle of refraction for blue light to find the angle separating the two colors in the refracted light in the sheet.

To find the angle separating the two colors in the refracted light, we use Snell's Law. The index of refraction for red light is 1.399 and for blue light is 1.432. By calculating the angles of refraction for each color, we can subtract them to find the angle separating the two colors.

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Therefore, the velocity of the ball just before it hits the ground is approximately 22.1 m/s. Therefore, the closest value to this option is 21.0 m/s.

When a ball of mass 0.25 kg falls from a height of 50 m, we can calculate its velocity using the principle of conservation of energy. According to this principle, the sum of the potential and kinetic energy of an object remains constant.

Therefore, we can equate the potential energy at the initial height to the kinetic energy at the final velocity.Let's calculate the potential energy of the ball at the initial height

:Eg = mghEg = 0.25 kg × 9.81 m/s² × 50 m

Eg = 122.625 J

This is the energy that the ball has due to its position. As it falls, this energy is transformed into kinetic energy. At the moment the ball reaches the ground, all the potential energy has been transformed into kinetic energy

.Ek = 1/2mv²Ek = Egv² = 2Ek/mv = √(2Ek/m)

Let's plug in the values we obtained:Eg = 122.625 Jm = 0.25 kgv = √(2Ek/m)

We obtain:v = √(2 × 122.625 J / 0.25 kg)v = √(245.25 J/kg)v = 22.116 m/s

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Answer:

3.678kJ

Explanation:

Given

mass= 75kg

height= 5 m

g= 9.81m/s^2

Required

Potential energy

PE= mgh

substitute

PE= 75*9.81*5

PE=3678.75J

PE= 3.678kJ

Answer:

I think 75 m

Explanation:

tell if it was correct

The speed of the Charlotte is 70.3 miles per hour or mi/h. To find out how far she has traveled in feet, we will first convert 70.3 mi/h to feet per second (ft/s) and then multiply it by the time she looked down at her phone (4.95 seconds).

1 mile = 5280 feet

1 hour = 3600 seconds

Therefore, 1 mile per hour = 5280/3600 feet per second (ft/s)70.3 miles per hour

= (70.3 × 5280)/3600 ft/s

= 103.1 ft/s

Now, we can calculate the distance traveled by Charlotte in feet using the formula:

distance = speed × time distance

= 103.1 ft/s × 4.95 s

= 510.345 feet (rounded to three decimal places)

Therefore, Charlotte has traveled 510.345 feet in 4.95 seconds when she looked down at her phone.

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The discharge from the orifice is approximately 11.71 m/s.

To compute the discharge from an orifice, we can use Torricelli's law, which states that the velocity of efflux (V) is given by the equation:

V = √(2gh)

where g is the acceleration due to gravity (approximately 9.8 m/s²) and
h is the height of the water from the center of the orifice.

Given that h = 7 m, we can calculate the velocity of efflux:

V = √(2 * 9.8 * 7) = √(137.2) ≈ 11.71 m/s

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The speed of the car is 55.2 m/s.

We can define speed as the ratio of distance to time. We know that the question states the car is one lap behind the lead race car when the lead car has 52 laps to go in a race.

If 1 lap =  1.34km or 1340 m

Distance covered =   1340 m * 52 = 69680 m

Time = 69680 m/ 56.3 m/s

= 1237.7 s

Given that the second car is one lap behind;

51 *  1340 m = 68340 m

Speed =  68340 m/1237.7 s

= 55.2 m/s

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A hydrogen atom is in its ground state (nᵢ = 1) when a photon impinges upon it. The atom absorbs the photon, which has precisely the energy required to raise the atom to the nf = 3 state. (a) The photon's energy that was absorbed is approximately 1.51 eV (negative sign indicates absorption).(b)option B and C are correct.

To determine the photon's energy and the energies of photons that might be emitted when the hydrogen atom returns to the ground state, we can use the energy level formula for hydrogen atoms:

E = -13.6 eV / n^2

where E is the energy of the electron in the atom, and n is the principal quantum number.

(a) To find the energy of the photon that was absorbed by the hydrogen atom to raise it from the ground state (nᵢ = 1) to the nf = 3 state, we need to calculate the energy difference between the two states:

ΔE = Ef - Ei = (-13.6 eV / 3^2) - (-13.6 eV / 1^2)

Calculating the value of ΔE:

ΔE = -13.6 eV / 9 + 13.6 eV

= -1.51 eV

Therefore, the photon's energy that was absorbed is approximately 1.51 eV (negative sign indicates absorption).

(b) When the hydrogen atom returns to the ground state, it can emit photons with energies corresponding to the energy differences between the excited states and the ground state. We need to calculate these energy differences and check which values are present among the given options.

ΔE1 = (-13.6 eV / 1^2) - (-13.6 eV / 3^2) = 10.20 eV

ΔE2 = (-13.6 eV / 1^2) - (-13.6 eV / 4^2) = 10.20 eV

ΔE3 = (-13.6 eV / 1^2) - (-13.6 eV / 5^2) = 12.10 eV

ΔE4 = (-13.6 eV / 1^2) - (-13.6 eV / 6^2) = 12.10 eV

ΔE5 = (-13.6 eV / 1^2) - (-13.6 eV / 7^2) = 13.55 eV

ΔE6 = (-13.6 eV / 1^2) - (-13.6 eV / 8^2) = 13.55 eV

ΔE7 = (-13.6 eV / 1^2) - (-13.6 eV / 9^2) = 13.55 eV

Comparing the calculated energy differences with the given options:

(A) 1.89 eV: This energy difference does not match any of the calculated values.

(B) 12.1 eV: This energy difference matches ΔE3 and ΔE4.

(C) 10.2 eV: This energy difference matches ΔE1 and ΔE2.

(D) 13.6 eV: This energy difference does not match any of the calculated values.

Therefore option B and C are correct.

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Complete question

A rigid tank is divided into two equal parts by a partition. One part of the tank contains 2.5 kg of compressed liquid water at 400 kPa and 60

60 ∘ C while the other part is evacuated. The partition is now removed, and the water expands to fill the entire tank. Determine the entropy change of water during this process, if the final pressure in the tank is 40 kPa.

Water expands to fill the entire tank. For a final pressure of 10 kPa, the final water temperature is 60°c and the tank volume is 2245.4.

The energy balance:

\(E_{in} -E_{out} =\) Δ\(E_{system}\)

So, therefore

0 = ΔU \(mm(u_{2} -u_{1} )\)

\(u_{1} =u_{2}\)

Water's characteristics are listed in tables A = 4 and A-6.

\(p_{1} = 600 kpa\)

\(T_{1}\) = 60°c

⇒ \(v_{1} = v_{f}\)

⇒ 60°c = 0.001017

⇒ \(u_{1} =u_{f}\)

⇒ 60°c = 251.16

Confirmed whether we receive quality between 0 and 1.

\(P_{2}\) = 10kpa

\((u_{2}-u_{1} )\)

We have \(v_{f}\) = 0.001010,

v = 14.670

\(u_{f}\) = 191.79,

\(v_{f}\) = 2245.4

So, therefore, water expands to fill the whole tank. For a final pressure of 10 kPa, the very last water temperature is 60°c and the tank quantity is 2245.4.

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The block, because there is no Force of Friction (Ffr) to slow it down.

-Normal Force (Fn) is perpendicular to ramp

- Force of Friction (Ffr) is going up the ramp

- Force of Gravity (Fg=w=mg) is going straight down

Force of Friction (Ffr) because it causes a rotation, therefore making the acceleration different if friction were negligible and it were slipping down the slope.

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Answer:

Explanation:

The strength of the force of friction depends on two factors: how hard the surfaces push together and the types of surfaces involved. What factors affect the gravitational force between two objects? Two factors affect the gravitational attraction between objects: mass and distance.

Answer:

P = 1 / f = 1 / 16.7 = .06 sec      period of 1 revolution

Period of 1/3 revolution = .06 s / 3 = .02 sec

If the light flashes every .02 sec the fan will appear motionless

Answer:

the rocks have the same amount of thermal energy

The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Answer:

Tt tT

tT tt

Explanation:

the rest I pretty sure don't understand

Answer:

B

Explanation:

cannot be effectively tested

The effectiveness of biofeedback has been a subject of controversy because biofeedback cannot be effectively tested.

What is biofeedback therapy?

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Answer:

Assuming that the first person pulls with 0° direction, the second person pulls with 90° direction and the third person pulls with 180° direction, the net force would be

\(F=(60-75)i+70j\\F=-15i+70j\)

It's module is

\(|F|=\sqrt{(-15)^{2} +(70)^{2} } =\sqrt{225+4900} \approx 71.6 \ KgF\)

Therefore, the net force is 71.6 Kgf

Now, in the second problem, if the forces are parallel and have the same direction and sense, that means those forces complement each other, that means if the major one is 250 Newtons, then the second one is 200 Newtons, because the net force is 250 N.

Therefore, the missing force is 200 N.

Answer:

2.38 T

Explanation:

Since the number of coils and the change in time are both 1, I set it up as 3.57=1.50(x) and then solved for x to be 2.38 T.