Calculate the gravitational attraction between two objects which masses are: mass A: 2.5kg, mass B: 5kg. The distance between them is 250m.

Answer:

Okay, based on the information provided:

   There is a current i flowing through the rectangular coil

   The coil is placed between the poles of a magnet

To determine the direction of the force on section ab of the coil, we need to know:

   The direction of the current (given as i, flowing in the shown direction)

   The polarity of the magnetic field - this will be either N-S or S-N

   The right hand rule - which says if you wrap your right hand thumb, index and middle finger in the direction of current and magnetic field, your palm will face the direction of force.

Some additional details or diagrams would help in conclusively determining the direction. But based on the information:

   The current i is flowing in the direction shown

   The magnetic field polarity could be either N-S or S-N

   If the current and magnetic field are in the same direction (both N-S or both S-N), the force would act in one direction. If opposite, the force would act in the opposite direction.

So some possibilities for the direction of force on section ab could be:

   Towards section a (if current and magnetic field in same direction)

   Towards section b (if current and magnetic field in same direction)

   Away from section a (if current and magnetic field opposite directions)

   Away from section b (if current and magnetic field opposite directions)

Without more details, I cannot conclusively determine the direction.

Explanation:

If the direction of a magnetic field around a vertical electrical wire is counter clockwise then the direction of the current will be from the bottom of the wire to the top.

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field. The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets.

Since a magnetic field's direction and strength can change depending on the location, it can be mathematically characterized by a function that assigns a vector to each point in space. This function is known as a vector field.

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The plan to present the sales from her lemonade stand as a pie chart may not work because a pie chart is used to show how a whole unit is divided into parts.

A pie chart is a circular statistical graphic divided into slices to show numerical proportion. The arc length of each slice in a pie chart is proportional to the quantity it represents.

Because a pie chart is used to show how a whole unit is divided into parts, her plan to present the sales from her lemonade stand may not work.

The whole unit in this case is the total sales for a specific time period (e.g., a week), and the parts are the amount of lemonade sold each day.

Example ePortfolio content for someone in a future job:

Example scenario where the SUM function would benefit a spreadsheet:

Example scenario where including a hyperlink to another spreadsheet would make sense:

Thus, this can be concluded regarding the given scenario.

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Answer:

1 m

Explanation:

The following data were obtained from the question:

Frequency (f) = 300 MHz

Velocity (v) = 3×10⁸ m/s

Wavelength (λ) =?

Next, we shall convert 300 MHz to Hz. This can be obtained as follow:

1 MHz = 10⁶ Hz

Therefore,

300 MHz = 300 MHz × 10⁶ Hz / 1 MHz

300 MHz = 3×10⁸ Hz

Thus, 300 MHz is equivalent to 3×10⁸ Hz.

Finally, we shall determine the wavelength of the as follow:

Frequency (f) = 3×10⁸ MHz

Velocity (v) = 3×10⁸ m/s

Wavelength (λ) =?

v = λf

3×10⁸ = λ × 3×10⁸

Divide both side by 3×10⁸

λ = 3×10⁸ / 3×10⁸

λ = 1 m

Therefore, the wavelength is 1 m

Answer:

  85.2 N

Explanation:

You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.

Your weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...

  W = k(M/r²) = 710 N

  W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N

Your weight would be 82.5 N.

No, the size of the displacement is always smaller than or equal to the distance a particle travels.

The shortest route taken is displacement. Consequently, it can only be equal to the distance if the distance is also the shortest path; otherwise, the distance will be more than the displacement. Q. Displacement always exceeds or equals distance.

The displacement cannot be more than the distance because the displacement is the linear amount of path traveled by a moving body during a specific time period, whereas the distance is the total amount of path traveled by a moving body during that time.

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Answer:

KE = 1/2 M V^2 = 35 kg / 2 * (10 m/s)^2

KE = 17.5 * 100 kg m^2 / s^2 = 1,750 Joules

(B) is the correct answer

Answer:

by increasing the force applied to the objects

Answer:

the work done can be positive or negative  

Explanation:

Answer:

A

Explanation:

Consider a question you may not have considered before. Suppose you have a mole of sodium in a container that contains nothing that it will react with. A mole of anything is 6.02 * 10^23 (in this case atoms).

Suppose that every one of those atoms has contributed 1 electron to something.

Do you think it would be safe to touch the container knowing that there are 6.02 * 10^23 positive charges all eager to get another electron, because they don't like repelling each other.

Safe or not? I'll give you a hint. A lightning bolt does not contain anywhere near 6.02*10^23 charges. No where near.

So -- since you never get a shock from just touching anything, There must not be electrons or ions present.

The answer is A

The top ones being parallel gives 1/(1/30 + 1/40) = 120/7 ohms. The rightmost path in series gives 30 ohms, and then the parallel pair on the right is 1/(1/50 + 1/30) = 75/4 ohms. I = V/R => 9 / (75/4+120/7) \(\approx\) .25A

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Answer:

4.298

Explanation:

the answer is 4.298 on acellus

The magnification is doubled when 10x oculars are used instead of 5x in our microscope with the same objectives.

When multiple lenses are lined together, the overall magnification can be calculated by multiplying the individual magnifications of each lens.

M = M1 × M2 × M3 × ... × Mn

where M is the overall magnification and M1, M2, M3, ..., Mn are the magnifications of the individual lenses.

Let M be the magnification of the objective, then the overall magnification,

when 5x ocular is used,

M1 = M × 5

M1 = 5M

when 10x ocular is used

M2 =  M × 10

M2 = 10M

Therefore, the magnification is doubled when 10x ocular is used instead of 5x in our microscope with the same objectives.

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Here volume of gas is not given so question is solved assuming volume as 1 L.

The number of moles of 1 L gas present in the sealed container at a

pressure of 125 kPa at 25 degrees Celsius is 0.0067 moles.

The ideal gas law equation can be written as

PV  = nR T

Here

P is the pressure of the gas in atm

V is the volume it occupies in L

n is the number of moles of gas present in the sample

R is the universal gas constant, equal to 0.0821 atm L/ mol K

T is the absolute temperature of the gas in Kelvin

Now, it's important to realize that the units you have for the volume, pressure, and temperature of the gas must match the unit used in the expression of the universal gas constant.

So

P = 125 kPa

1 atm = 760 kPa

P = 125/760 = 0.1644 atm

T = 25 degree celsius  = 25 +273 = 298 K

Taking V  = 1 L

So

n  = PV/RT

n = 0.1644 x 1 / 0.0821 x 298

n =  0.0067 moles

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Answer:

0.125 J

Explanation:

E = ½ kx²

E = ½ (25 N/m) (0.10 m)²

E = 0.125 J

The stored elastic potential energy from the given equation is equal to 0.5 J.

When an elastic object, such a spring or a stretched rubber band, is displaced from its equilibrium state, it stores energy called elastic potential energy.

Given:

Spring constant, k = 25 Nm⁻¹

Distance, s = 10 cm

From the given equation

E = (0.5) × k × e²

Substitute values:

Ee = (0.5) ×  k × e²

Ee = (0.5) ×  25 ×  (0.1)²

Ee = 0.5 J

Hence, the stored elastic potential energy from the given equation is equal to 0.5 J.

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Answer:

I say that the answer is D all of the above hope this helps ‍♂️

The reason only one car accelerates is because it is the one that experiences an unbalanced net force due to gravity.

Force is defined to be mass times acceleration in physics. This is known as Newton's second law of motion. In mathematical symbols, we can define force as F = ma where F is force, m is mass, and a is acceleration. Rearrange it a little bit and we get a = F/m. This means that if there is a force that is acting on an object (mass), the object then can accelerate.

Net force means the vector sum of forces acting on an object. If the net force is equal to zero, then the object won't accelerate even with all the forces acting on that object. When it isn't equal to zero, there must be an unbalanced force, which leads to acceleration.

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Answer:m1v1 + m2v2 = (m1f + m2f)vf. 3000kg(10.0m/s) + (15000kg)(0.0m/s) = (18000kg)(vf).

Explanation:

A portion of a worksheet window bounded by and separated from other portions by vertical or horizontal bars is a:B. Pane.B. Pane.

A pane is a section of a worksheet window that is enclosed and isolated from other sections by vertical or horizontal bars. As in a scroll pane, split pane, or frozen pane in a spreadsheet programme, a pane is a discrete area of a window that is divided from other sections by horizontal or vertical bars. Panes let users examine and interact with various sections of a large worksheet or document without having to scroll or explore the entire thing. To personalise the display and make it simpler to work with enormous volumes of data, panes can be moved, resized, or hidden.

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Answer:

because sound needs medium to transmit.

The sound is produced by vibration and if there is no medium there is no vibration and no vibration means no sound.

The Copernican Principle refers to the idea that there is nothing special about our place in the universe, and that everything in the universe revolves around the Sun, challenging the geocentric model.

The Copernican Principle is a foundational concept in astronomy and cosmology. It challenges the geocentric view by asserting that there is nothing special about our place in the universe. It proposes that everything in the universe, including celestial bodies and systems, revolves around the Sun. This heliocentric model, pioneered by Nicolaus Copernicus, marked a significant shift in our understanding of the cosmos. It introduced the idea that the Earth is not the center of the universe but rather a planet in orbit around the Sun. The Copernican Principle has since shaped our perception of the vastness and diversity of the cosmos, challenging previous geocentric beliefs.

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a. For Case 1, the outlet temperature of the ideal gas is 800°C, and for Case 2, the outlet temperature is 1800°C.

b. For Case 1, the rate of entropy generation in the system is 3 kJ/s·K, and for Case 2, it is 5 kJ/s·K.

c. Increasing the temperature of the incoming gas does not change the answers for (a) because the heat transfer and temperature change occur independently in the system.

a. In Case 1, the outlet temperature of the ideal gas is calculated by using the heat transfer equation, Q = mCΔT, where Q is the heat transfer, m is the mass flow rate, C is the heat capacity, and ΔT is the temperature difference.

Substituting the given values, we have Q = (1 kg/s) × (1000°C) × (2000°C - Tout_1), where Tout_1 is the outlet temperature for Case 1. Solving for Tout_1, we find Tout_1 = 800°C. Similarly, for Case 2, the outlet temperature (Tout_2) can be calculated using the same equation, resulting in Tout_2 = 1800°C.

b. The rate of entropy generation in the system can be determined using the equation ΔS = Q/T, where ΔS is the change in entropy, Q is the heat transfer, and T is the temperature. For Case 1, ΔS_1 = Q/T_1 = Q/(2000°C), and for Case 2, ΔS_2 = Q/T_2 = Q/(2000°C).

Since the heat transfer Q is the same for both cases, the rate of entropy generation will be different due to the difference in temperature. Plugging in the values, we find ΔS_1 = 3 kJ/s·K and ΔS_2 = 5 kJ/s·K.

c. Increasing the temperature of the incoming gas does not change the answers for (a) because the heat transfer equation is independent of the temperature of the incoming gas. The outlet temperature of the ideal gas is determined by the heat transfer and the temperature difference, which are unaffected by the incoming gas temperature.

Therefore, increasing or decreasing the incoming gas temperature does not change the outlet temperature of the ideal gas. However, it can affect the rate of entropy generation because the entropy change is directly proportional to the temperature. Higher temperatures result in higher rates of entropy generation.

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Contaminants are substances or agents that are present in a material or environment, frequently in unwanted or hazardous proportions, and which may harm the environment, and human health.

They include pollutants that are released from industrial operations, agricultural practices, or human activities, such as pesticides, heavy metals, volatile organic compounds (VOCs), and polychlorinated biphenyls (PCBs).

They include pollutants that are released from industrial operations, agricultural practices, or human activities, such as pesticides, heavy metals, volatile organic compounds (VOCs), and polychlorinated biphenyls (PCBs).

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The wave having a wavelength of 50 m and traveling through water that is 30 m deep would be a deep water wave.

According to the definition, a deep water wave is a wave that occurs at water depths that is more than half the wavelength of the wave.

In the given case, the wavelength of the wave is 50 m and the depth of the water is 30 m which is more than half of the wavelength of the wave which is 25 m. Thus, the depth of the water is more than half of the wavelength of the wave. This makes the wave a deep water wave.

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The velocity of the packet when it reaches the ground  is 121.24 m/s.

Velocity is defined as a vector measurement of the rate and direction of motion.

To calculate the velocity of the packet, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for v

Hence, the velocity of the packet is 121.24 m/s.

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