The gravitational force of attraction between two students sitting at their desks in physics class is 2.30 x 10-8 N. If one student has a mass of 45.0 kg and the other has a mass of 55.0 kg, how far apart are the students sitting? Round your answer to the nearest tenth of a meter.

Answer:

What is the pressure transmitted in the liquid on a hydraulic pump where an elephant with a weight of 40 000 N is placed on top of the large piston with an area of 40 m2. The small piston area is 4 m2.

Heat received by cold water equals heat lost by hot water. 60°C is the ultimate temperature.

An evaluation of an object or substance's warmth or coolness in relation to a reference value.

a measurement of how much heat is required to raise the temperature of a material by one degree Celsius for every gramme.

The unit of measurement for specific heat is Joules per gramme per degree Celsius (J/g °C).

Let c represent the water's specific heat.

based on the calorimetry concept.

Heat received by cold water equals heat lost by hot water.

200 * c * (80 - T) = 100 * c * (T - 20) (T - 20)

∴ 200c (80-T) = 100c(T-20) (T-20)

∴2 (80-T) = T - 20

∴160-2T=T-20

∴ 160+20 = T +2T

∴180 = 3T

∴T = 60 C.

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Answer: The Coriolis effect results in bending the direction of surface currents to the right in the Northern Hemisphere and left in the Southern Hemisphere. The Coriolis effect causes winds and currents to form the circular patterns. The direction in which they spin depends upon the hemisphere in which they are present.Coriolis Effect is named after the French mathematician and physicist Gaspard-Gustave de Coriolis. It affects the weather patterns of an area, it affects the ocean currents, and it also affects air quality.

Given the statement:

The further away the galaxy is, the ____________ the shift found by the Hubble.

Let's complete the statement.

According the Hubble's brilliant observation, the shift of the galaxy is directly proportional to the distance of the galaxy from the Earth.

This means that as the distance of the galaxy increases, the shift also increase.

Therefore, the further away a galaxy is, the greater the shift found by the Hubble telescope.

ANSWER:

D. Greater

Answer:D.Compound

Explanation: internet

A man becomes obsessed with the memory of his deceased wife and remarries, only to have strange and supernatural occurrences happen.

"Ligeia" is a short story written by Edgar Allan Poe, first published in 1838. The story follows an unnamed narrator and his love for the beautiful and intelligent Ligeia, whom he marries. After Ligeia falls ill and dies, the narrator marries again, but cannot forget his first wife. Strange occurrences and mysterious events lead the narrator to question whether Ligeia has truly left him, or if she has found a way to return from beyond the grave. The story explores themes of love, death, grief, and the supernatural.

The paragraph is "In Edgar Allan Poe's story "Ligeia," the narrator is haunted by the memory of his deceased wife, Ligeia, whom he believes to possess supernatural qualities. He later marries Lady Rowena, but her death leads the narrator to believe that Ligeia has returned to him through her body. The story explores themes of obsession, grief, and the blurred lines between reality and fantasy."

Therefore, "Ligeia" is a story by Edgar Allan Poe about a man who becomes obsessed with his beautiful and intelligent wife, Ligeia, who dies and mysteriously returns to life in the form of another woman after his second marriage to Lady Rowena.

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Explanation:

You left out some important information.....but the bullet will fall the vertical distance ( the height)  from which it was fired.

The final volume of the balloon is 197,083 L.

They are proportional to each other if the pressure does not change. However, there are pitfalls. To perform calculations we have to use the so-called absolute temperature. Increased external air pressure compresses the balloon.

Using equation;

PV =nRT

here constants are P,n, R

so the relation between P and T is

V₁ /T₁= V₂/T₂

V₂ = (V₁ /T₁)×T₂

    = (125,000/300)×473

     = 197,083 L.

As the volume of the balloon decreases the pressure inside the balloon increases. After all external air pressure can compensate. It becomes a balloon filled with dense cold air. According to Boyle's law, the volume of a gas of constant mass at constant temperature is inversely proportional to its pressure. The air around you has weight and pushes away everything it touches. This pressure is called atmospheric pressure or barometric pressure. This is the force exerted on a surface by the air above as gravity pulls the surface toward the Earth.

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Answer:

i dont know

Explanation:

hello

Answer: B Hope I helped ^^

Explanation:

The gradient of River X expressed in m/km is 20 m/km.

Any line or curve's gradient will reveal the pace at which one variable is changing in relation to another. In all mathematical fields, this idea is crucial.

By dividing the difference between the -coordinates by the difference between the -coordinates, the gradient of a line is calculated. This can also be referred to as the vertical divided by the horizontal or the change in divided by the change in.

A river's gradient is a measurement of how steeply it declines over a specific distance.

Gradient = vertical change / horizontal distance = 20 meters / 1 kilometer = 20 m/km

Therefore, the gradient of River X expressed in m/km is 20 m/km.

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The braking force applied to Dizzy's car is approximately 50,600 Newtons in the opposite direction to the car's motion.

Braking force is the force applied by a vehicle's brakes to slow down or stop the vehicle. To determine the braking force applied to Dizzy's car, we can use the equation:

force = mass x acceleration

where the acceleration is the rate at which the car's velocity changes during braking.

First, we need to calculate the initial velocity of the car before braking:

v0 = 22.8 m/s

Next, we need to calculate the final velocity of the car after braking:

vf = 2.9 m/s

The change in velocity, or delta-v, is:

delta-v = vf - v0 = 2.9 m/s - 22.8 m/s = -19.9 m/s

Note that the negative sign indicates a decrease in velocity.

We also need to calculate the time it takes for the car to come to a stop. We can use the equation:

delta-x = (v0 + vf) / 2 x t

where delta-x is the distance traveled during braking, which is given as 5.55 m.

Rearranging the equation, we get:

t = 2 x delta-x / (v0 + vf)

Substituting the given values, we get:

t = 2 x 5.55 m / (22.8 m/s + 2.9 m/s) = 0.393 s

Now we can calculate the acceleration:

acceleration = delta-v / t = (-19.9 m/s) / (0.393 s) = -50.6 m/s^2

Again, the negative sign indicates a deceleration or braking acceleration.

Finally, we can calculate the force applied to the car:

force = mass x acceleration

The mass of the car is not given, but we can assume it is approximately the same as the average mass of a roller coaster car, which is around 1000 kg.

Substituting the values, we get:

force = 1000 kg x (-50.6 m/s^2) = -50,600 N

Therefore, the braking force applied to Dizzy's car is approximately 50,600 Newtons in the opposite direction to the car's motion.

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Answer:

Evaporation of water

Explanation:

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ur answer is

Evaporation of water.

Answer:

16m + 25m + 16m = 57m

the car travelled 57 m

Answer:

Well if they playing a game like that

NOT an event horizon is its binary counterpart, which transports matter to it.

To refer to the item or person that is the target of an action, we typically use the word "object." Alternatively, the recipient. In a sentence, a verb's action is transferred to a noun or pronoun as a direct object. It typically responds to the what- or whom-questions regarding the verb.

Icons, cursors, buttons, sprites, and other complicated artworks can be made from a collection of simple visual pieces called image objects. Without having to sketch a single pixel, Image Objects let you express creativity.

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Answer:

Series

Explanation:

Wired in 'series' means there is only one path for current.....so when either light burns out, the circuit is broken and there is no path for current so the other light will be unlit

Answer:

If F is a constant, we can take f = 1

f = m×a

ma = 1

therefore we can say that force is hence proportinal to the product of mass and acceleration.

Answer:

Approximately \(2.8\; {\rm m\cdot s^{-1}}\).

Explanation:

If an object of mass \(m\) is travelling at a velocity of \(v\), the momentum \(p\) of that object would be \(p = m\, v\).

Momentum before collision:

Total momentum before collision:

Momentum after collision:

Momentum is conserved immediately before and after collisions. Hence, the total momentum of the two masses after the collision would be equal to the sum of their momentum before the collision, \(54\; {\rm kg \cdot m\cdot s^{-1}}\).

Subtract the momentum of the \(4.5\; {\rm kg}\) mass after the collision from the sum of momentum after the collision: \(54\; {\rm kg \cdot m\cdot s^{-1}} - 36\; {\rm kg \cdot m \cdot s^{-1}} = 18\; {\rm kg \cdot m \cdot s^{-1}}\).

Hence, the momentum of the \(6.5\; {\rm kg}\) mass after the collision would be \(18\; {\rm kg \cdot m \cdot s^{-1}}\). The velocity of this mass would be:

\(\begin{aligned}v &= \frac{p}{m} \\ &= \frac{18\; {\rm kg\cdot m \cdot s^{-1}}}{6.5\; {\rm kg}} \approx 2.8\; {\rm m\cdot s^{-1}}\end{aligned}\).

The net force can also be written in component form as Fnet = <0, 0.455> N.

a) The vertical component of acceleration, ay, is given by the second derivative of the position with respect to time (t) and can be expressed as:

ay = d²y/dt²

    = d/dt(dy/dt)

    = d/dt(vy)

Using the chain rule and the fact that x = 0 when y = 0, we can express vy in terms of x, vx, and ax as follows:

vy = dy/dt = d/dt(√(2ax)x) = √(2ax)(dx/dt) + x(1/√(2ax))(d/dt(2ax)) = vx√(2/x) + ax√(x/2)

Substituting this expression for vy into the equation for ay yields:

ay = d/dt(vy)

   = (d/dt(vx))(√(2/x)) + vx(d/dt(√(2/x))) + (d/dt(ax))(√(x/2)) + ax(d/dt(√(x/2)))

   = ax/2 - vx²/x³/2

b. At the lowest point of the parabola, x = -1 m and vx = 2.3 m/s. Using the expression for ay derived in part (a), we can find the vertical component of acceleration at this instant:

ay = ax/2 - vx²/x³/2

    = (9.8 m/s²)/2 - (2.3 m/s)²/(-1 m)³/2

     = 4.55 m/s²

The net force on the bead at this instant is equal to its mass (0.1 kg) times the vertical component of acceleration:

Fnet = may = (0.1 kg)(4.55 m/s²)

                  = 0.455 N upward,

where the upward direction is defined as positive. The net force may alternatively be expressed as a component as Fnet = <0, 0.455> N.

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If a train travelled 500 meters in 25 seconds then,

Speed = 500m/25sec

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speed=500m/25sec

20m/sec

The potential V(r) for r<b is V(r) = (λ/2πϵ0)ln(b/a) - (λ/2πϵ0)ln(r/a). The potential of the inner cylinder with respect to the outer is Vab = (λ/2πϵ0)ln(b/a). If the outer cylinder has no net charge, the potential difference between the two cylinders is Vab = (λ/2πϵ0)ln(b/a).

To calculate the potential V(r) for r<b, we use the formula for the potential due to a uniformly charged line. The potential at a distance r from the axis of the cylinder can be found by summing the potentials due to the positive and negative charges on the inner and outer cylinders. Using the formula V = (λ/2πϵ0)ln(b/a), where λ is the charge per unit length, ϵ0 is the permittivity of free space, and a and b are the radii of the cylinders, we can derive the expression V(r) = (λ/2πϵ0)ln(b/a) - (λ/2πϵ0)ln(r/a).

The potential of the inner cylinder with respect to the outer cylinder, denoted as Vab, can be calculated by substituting r = a into the expression for V(r). This simplifies the equation to Vab = (λ/2πϵ0)ln(b/a).

If the outer cylinder has no net charge, the potential difference between the two cylinders is equal to the potential of the inner cylinder with respect to the outer cylinder. Therefore, the potential difference Vab is given by Vab = (λ/2πϵ0)ln(b/a).

In summary, the potential V(r) for r<b can be determined using the charge per unit length λ, the radii a and b, and the permittivity of free space ϵ0. The potential of the inner cylinder with respect to the outer cylinder is Vab, and it is equal to (λ/2πϵ0)ln(b/a). If the outer cylinder has no net charge, the potential difference between the two cylinders is also Vab.

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The capacitance per kilometer to neutral in the equilateral arrangement is approximately 0.00667 μF/km.

To calculate the capacitance per kilometer to neutral when conductors are placed equilaterally spaced 4 m apart and regularly transposed, we can use the formula for the capacitance of an equilateral triangle arrangement of conductors:

Ceq = (2/3) * C

where Ceq is the capacitance per kilometer to neutral in the equilateral arrangement, and C is the capacitance per kilometer in the original arrangement.

Given that the capacitance of the original arrangement is 0.01 μF/km, we can calculate the capacitance per kilometer to neutral in the equilateral arrangement:

Ceq = (2/3) * C

    = (2/3) * 0.01 μF/km

    ≈ 0.00667 μF/km

Therefore, the capacitance per kilometer is approximately 0.00667 μF/km.

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(a) The distance of the image of the pencil from the lens is determined as 6 m.

(b) The image formed is upright, because it is magnified.

The distance of the image formed is determined by applying lens formula as shown below;

1/f = 1/v + 1/u

1/v = 1/f - 1/u

1/v = 1/2 - 1/3

1/v = (3 - 2)/6

1/v = 1/6

v = 6 m

M = v/u

M = 6/3

M = 2

A convex lens forms an upright and magnified image.

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We have the next information

The correct statement is: Two objects are resolvable if the angle between them is smaller than that given by Rayleigh's criterion.

Rayleigh's criterion, also known as the Rayleigh criterion of resolution, provides a criterion for determining the minimum angle at which two objects can be resolved as separate entities in an optical system, such as a telescope. According to Rayleigh's criterion, two point sources are just resolvable if the central maximum of the diffraction pattern produced by one source coincides with the first minimum of the diffraction pattern produced by the other source.

In practical terms, this means that if the angle between the objects is smaller than the angle determined by Rayleigh's criterion, they will appear as separate and distinct objects. On the other hand, if the angle between the objects is equal to or greater than the angle given by Rayleigh's criterion, they will blend together and cannot be resolved as separate entities.

Therefore, for two objects to be resolvable, the angle between them must be smaller than the angle specified by Rayleigh's criterion. This criterion defines the limit of resolution and is influenced by factors such as the wavelength of light and the aperture size of the optical system.

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The angular acceleration of the potter's wheel is 0.067 rad/s².

The given parameters:

The angular acceleration of the potter's wheel is calculated as follows;

\(\alpha = \frac{\Delta \omega }{t} \\\\\alpha = (0.4\ rev/s \times \frac{2 \pi \ rad}{1 \ rev} ) \times \frac{1}{37.5 \ s} \\\\\alpha = 0.067 \ rad/s^2\)

Thus, the angular acceleration of the potter's wheel is 0.067 rad/s².

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