water enters the ground floor of a residential apartment building, flowing slowly into a wide pipe at high pressure. the water then rises and exits at high speed through a narrow pipe in a bathroom 3 stories above the ground floor. explain the factors that account for the lower pressure in the bathroom pipe.

When compared to winds at the surface, winds at 2,000 feet are typically higher due to the absence of friction.

At the surface, winds are affected by friction with the Earth's surface, which slows them down and causes them to move in a more turbulent and erratic fashion. However, as winds move up in altitude, they encounter less and less friction, allowing them to increase in speed and flow in a more uniform and predictable manner.
While friction may still have some influence on winds at 2,000 feet, it is not as significant as at the surface. Therefore, winds at this altitude tend to move more smoothly and follow a more consistent path, often perpendicular to the isobars (lines of equal pressure) on a weather map. This makes them useful for aviation purposes, as pilots can use this information to plan their flight paths and take advantage of favorable tailwinds or avoid dangerous crosswinds.
In contrast, winds at the surface are more affected by local topography, temperature gradients, and other factors that can cause them to vary widely in direction and speed. Overall, winds at 2,000 feet are an important component of the Earth's atmospheric circulation system, and understanding their behavior is essential for predicting weather patterns and ensuring safe air travel.

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Answer:

True

Explanation:

Answer:

C = 1.01

Explanation:

Given that,

Mass, m = 75 kg

The terminal velocity of the mass, \(v_t=60\ m/s\)

Area of cross section, \(A=0.33\ m^2\)

We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,

Weight of the object = drag force

R = W

or

\(\dfrac{1}{2}\rho CAv_t^2=mg\)

Where

\(\rho\) is the density of air = 1.225 kg/m³

C is drag coefficient

So,

\(C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01\)

So, the drag coefficient is 1.01.

Answer:

Explanation:

In order for the roller coaster to complete a vertical loop of radius 10 m, it must have enough speed at the top of the loop to overcome the force of gravity and maintain contact with the track. At the top of the loop, the roller coaster is momentarily at rest (i.e., its speed is zero), and the only force acting on it is gravity. Therefore, we can use the following equation to find the minimum speed required:

where m is the mass of the roller coaster, v is its speed at the top of the loop, r is the radius of the loop, and g is the acceleration due to gravity.

Solving for v, we get:

Substituting in the given values, we get:

The roller coaster's minimum speed at the top of the loop should be approximately 9.90 m/s  that has radius 10 m.

To complete a vertical loop without falling off at the top, the roller coaster must have sufficient speed to counteract gravity.

At the top of the loop, the minimum speed required can be found using the concept of centripetal force.

At the top of the loop, the centripetal force (provided by the roller coaster's speed) must equal the force due to gravity. This can be expressed as:

\(mv^2\)/ r = mg

Where m is the mass of the roller coaster, v is its speed, r is the radius of the loop, and g is the acceleration due to gravity

(approximately 9.81 \(m/s^{2}\)).

Solving for v:

\(v^2 = rg\)

v = \(\sqrt{(10 m * 9.81 m/s^{2} )\) ≈ \(\sqrt{(98.1 m^{2} /s^{2} )\) ≈ 9.90 m/s

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The magnitude of the electric field when it is located at a distance of 4.0 mm from the symmetry axis is 4.5 N/C

The absolute or relative direction or size of an object's motion in the sense of motion can be used to define magnitude. It is extensively utilized to convey something's size or scope. In physics, the term "magnitude" typically means "distance" or "quantity."

The charge density = 80 nC/m3.

The inner radius, r' = 1 mm

The outer radius, r'' = 3 mm

distance,  r = 4 mm

The linear charge density is given by

λ = ρ π ( r"²- r²).

λ = 80 ×10⁻⁹  × 3.14 ×  10 ⁻⁶× (9-1).

λ = 2 × . 10⁻¹²

The electric field is given by,

E = λ/4πe0r.

E = 4.5 N/C.

Therefore, the magnitude of the electric field at a point that is 4.0 mm from the symmetry axis is found to be 4.5 N/C.

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The focal length of these lenses is 50cm.

Solution:

Write the expression for the relationship between the power (P) and focal length (f) of a lens.

P = 1/F

From the above expression, the focal length of the given lenses can be determined as follows.

P = 1/F

F = 1/P

= 1/2.0D

= 5D⁻¹ (1M/1D⁻¹ )

= 0.5 M

= 50cm

The focal length of a lens is determined when the lens is focused to infinity. The focal length of a lens indicates its angle of view and magnification. The longer the focal length the narrower the angle of view and the higher the magnification.

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The number of characters that can be recorded per inch on a magnetic tape is determined by the density of the tape. Data storage and retrieval are essential to the functioning of computing systems. In the past, data was primarily stored on punched cards and punched paper tape.

These storage mediums had several limitations, including low storage capacity and low access speeds. Magnetic tape is a data storage medium that has been utilized to overcome these drawbacks. Magnetic tape is a thin strip of plastic that has a magnetic coating. Data can be stored on the tape by using magnetic recording techniques.The number of characters that can be recorded per inch on a magnetic tape is determined by the density of the tape. The density is the number of magnetic transitions that can be recorded on the tape per unit of length. The higher the density of the tape, the more data that can be stored on it per inch of length.

Magnetic tapes can have a density ranging from 800 bits per inch (BPI) to 6250 BPI or higher. A higher density of tape requires a more sophisticated recording technique, which can limit the access speed of the tape drive. As a result, a balance must be struck between data storage capacity and access speed.

Thus, the correct option is c. Density. The density of the tape determines the number of characters that can be recorded per inch on a magnetic tape. A higher density of tape can store more data but may require more sophisticated recording techniques that can limit access speed.

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According to the law of conservation of momentum, sum of the momenta of the bodies before collision is equal to the sum of their momenta after collision.

After their collision, the two bodies will move with a common velocity. The elastic collision as the name suggests, the collision is very elastic and there is no net energy loss in it and the bodies continue to move in same direction.

Here, a massive mass collides with a light mass which is at rest.

From the formula m₁v₁ = m₂v₂ we can know the speed after collision.

Once the massive mass collides with the lighter mass, the lighter mass which was until then at rest, will start moving (since it is elastic collision) and acquire the velocity of the massive mass.

These will move in the same direction. Due to elastic collision, the speed of massive mass will be unchanged (neglecting friction) and the lighter mass will gain a velocity v.

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Answer:

How many questions should be answered??

Answer:

14.7 m/s.

Explanation:

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

Time (t) = 1.5 s

Acceleration due to gravity (g) = 9.8 m/s².

Height = 11.025 m

Final velocity (v) = 0 m/s

Initial velocity (u) =?

We, can obtain the initial velocity of the penny as follow:

H = ½(v + u) t

11.025 = ½ (0 + u) × 1.5

11.025 = ½ × u × 1.5

11.025 = u × 0.75

Divide both side by 0.75

u = 11.025/0.75

u = 14.7 m/s

Therefore, the penny was travelling at 14.7 m/s before hitting the ground.

Answer:

Average velocity = 0.375 m/s

Explanation:

Average velocity = net displacement/total time

The penguin swims leftward 9m then dodges rightward another 12m. Let left side is negative and right side is positive.

Average velocity,

\(v=\dfrac{-9+12}{8}\\\\v=\dfrac{3\ m}{8\ s}\\\\v=0.375\ m/s\)

So, the penguin's average velocity during the chase is 0.375 m/s.

Answer:

Velocity=0.38

Speed=2.6

Explanation:

Answer:

It could be low self-esteem

Explanation:

There probably insecure have problems and issues of their own could be that were abused growing up and weren’t treated right who knows.

It would take 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

To calculate the time required to crumple the barrier and safely slow down the person, we can use the concept of impulse.

The impulse, denoted by J, is defined as the product of force and time, and it represents the change in momentum of an object. In this case, the impulse required to safely slow down the person can be calculated using the maximum force and the person's initial momentum.

The momentum of a person is given by the product of their mass and velocity:

Momentum = mass × velocity

Given that the person's mass is 68 kg and their velocity is 27 m/s, the initial momentum is:

Initial momentum = 68 kg × 27 m/s

To safely slow down the person, the impulse provided by the barrier should be equal to the change in momentum.

Therefore, we have:

Impulse provided by barrier = Final momentum - Initial momentum

Since the person is brought to rest, the final momentum is zero. Thus, we have:

Impulse provided by barrier = -Initial momentum

Now we can express the impulse in terms of force and time:

Impulse provided by barrier = Force × Time

Plugging in the known values, we can solve for time:

-Initial momentum = Force × Time

68 kg × 27 m/s = 1180 N × Time

Simplifying the equation, we find:

Time = (68 kg × 27 m/s) / 1180 N

Evaluating the expression:

Time = 1836 kg·m/s / 1180 N

Finally, converting kg·m/s to seconds, we get:

Time ≈ 1.5559 seconds

Therefore, it would take approximately 1.556 seconds for the barrier to crumple and safely slow down the person with a force of 1180 N.

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Having a flat tire is one of the predominant inconveniences of riding. A guide car jack is designed to raise the vehicle high sufficient to eliminate the flat tire.

Converting a tire is definitely an alternative bodily trauma. we need to place a few muscles in getting the lug nuts off and cranking the jack, after which you need to bend down and lift the tire. regularly, oldsters will try to do all of this in a rush to get on their way, however, it really is a mistake.

To change eliminate the flat tire. The following steps should be followed:-

Having a flat tire is one of the predominant inconveniences of riding. while a terrific spare is unavailable, you both have to call a tow truck or repair the tire ourselves. luckily, the process of fixing it yourself is noticeably sincere and requires only a few gears.

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The flux from a point source falls off like the square of the distance because the intensity of the light is spread out over a larger area as the distance from the source increases. This is known as the inverse square law and is represented by the equation f = 1/r^2.

For an infinite line source, the flux will fall off like the inverse of the distance (f = 1/r) because the intensity of the light is spread out over a larger length as the distance from the source increases.

For an infinite sheet source, the flux will not depend on the distance at all (f = constant) because the intensity of the light is spread out over an infinite area and will therefore remain constant no matter how far away the observer is from the source.

The flux from a light bulb decreases with the square of the distance because it is a point source and follows the inverse square law. However, the flux from a good laser pointer does not depend on distance because it is a highly collimated beam of light that does not spread out significantly as it travels. This means that the intensity of the light remains constant and the flux does not decrease with distance.

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Answer:

Sexually transmitted diseases are spread by direct contact with bodily fluids.

Explanation:

if you have a disease you can give it to someone by having sex because your fluids go into or either combine

Answer:

B

Explanation:

The power consumed by the razor is 100W.

According to Ohm's law,

Therefore Resistance R = \(V^{2}\) / P

Given,

Power in North America P\(^{NA}\) = 25 w

Voltage in North America V\(^{NA}\) = 120 V

Voltage in Europe V\(^{EU}\) = 240 V

Resistance in North America R\(^{NA}\) = \(120^{2}\) / 25 = 576 Ω

Resistance in Europe R\(^{EU}\) = 576 Ω ( Assumed constant )

Power in Europe P\(^{EU}\) = \(240^{2}\) / 576 = 100 w

Ohm's law describes that the Current across a conductor is directly proportional to the Voltage across those two points.

Therefore power consumed by the razor is 100W.

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The acceleration of the stone at the top of its vertical path is C) somewhat less than 10 m/s².

When the stone is thrown vertically upward, it experiences a downward acceleration due to gravity. As it moves upward, the gravitational force acts in the opposite direction of its motion, slowing it down. At the highest point of its trajectory (the top of its vertical path), the stone momentarily comes to a stop before reversing direction and falling back down.

Since the stone reaches a momentary stop at the top, its velocity changes from positive (upward) to zero. Therefore, the stone experiences a deceleration (negative acceleration) at the top. While the acceleration due to gravity on Earth is approximately 9.8 m/s², it is somewhat less than that at the top because the stone is decelerating but not yet accelerating downward.

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The speed of sound in the room is 354 m/s. The result is obtained by using the formula for frequency in an open organ pipe.

An organ pipe is an element that produces sound resonating at a specific pitch when pressurized air is exerted through it.

There are two kinds of organ pipe. They are

The frequency of an open organ pipe can be calculated by

fₙ = v / λ

fₙ = (n + 1)v / 2L

Where

Note:

An organ pipe in which open at both ends produces sound.

Find the speed of sound in the room!

The frequency of second overtone means frequency of the second-harmonic. So, n = 2.

Using the formula above, the speed of sound is

fₙ = (n + 1)v / 2L

f₂ = (2 + 1)v / 2(1.75)

303 = 3v/3.5

3v = 303 × 3.5

3v = 1060.5

v = 353.5

v ≈ 354 m/s

Hence, in the room of the open organ pipe, the speed of sound is 354 m/s. The correct answer is (c).

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If the charge on A increases, the force on BOTH objects will increase.

The electric force between two charges is always equal in both directions, just like the gravitational force between two masses.

So I guess choice-B  and choice-D  are both correct.  

Answer:

D. The electric force between A and B will increase.​

Explanation:

Answer:

True

Explanation:

Mitosis is the process of cell division that produces two identical daughter cells. Occasionally mutations can occur during DNA replication or the other stages of mitosis. However, cells have mechanisms for DNA repair that can correct these mutations, ensuring the integrity of the genetic material.

The net force acting on the sprinter is approximately 255.14 N.

At the end of the 2.8 seconds, the sprinter has a velocity of 9.4 m/s, so the final momentum is:

p = m * v

p = 76 kg * 9.4 m/s

p = 714.4 kg m/s

The change in momentum is the final momentum minus the initial momentum:

Δp = p_final - p_initial

Δp = 714.4 kg m/s - 0 kg m/s

Δp = 714.4 kg m/s

The time over which this change in momentum occurs is 2.8 seconds, so we can use the impulse-momentum theorem to find the net force:

F_net = Δp / Δt

F_net = 714.4 kg m/s / 2.8 s

F_net = 255.14 N

Net force refers to the overall force acting on an object. It is the vector sum of all the forces acting on the object. A force is any influence that can cause a change in the motion or shape of an object. When multiple forces act on an object, the net force is determined by adding up all the forces and considering their direction and magnitude.

The net force can be either zero, which means the forces are balanced and the object is at rest or moving at a constant velocity, or non-zero, which means the forces are unbalanced and the object is accelerating. Acceleration is directly proportional to the net force and inversely proportional to the mass of the object (Newton's second law of motion).

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Answer:

2730.304 KJ

Explanation:

 How much heat is required to convert 0.8 kg of ice at  -35°C into steam at 100 C?

Given that:

mass of ice (m) = 0.8 kg = 800 g

Initial temperature (\(T_i\)) = -35°C = 238 K

final temperature (\(T_n\))= 100°C = 373 K

Specific heat of ice (\(S_i\)) = 2.108 J/g.K

Specific heat of water (\(S_w\)) = 4.18 J/g.K

Latent heat of fusion (\(L_f\)) = 334 J/g.

Latent heat of vaporization (\(L_v\)) = 2230 J/g.

\(\Delta T=T_n-T_i=373-238=135K\)

Total heat (Q) required to increase the temperature of ice from the initial temperature of 238K to final temperature of 373 K is given by the equation:

\(Q=m\Delta TS_i+m\Delta TS_w+mL_f+mL_v\\Q=800(135)*2.108+800(135)*4.18+800*334+800*2230\\Q=227664+451440+267200+1784000=2730304J\\Q=2703.304KJ\)

Answer:

In the context of talking about speeds, darkness is what you get after the light stops coming, and therefore travels at the speed of light. For instance, consider that you are in distant space, far from all light sources such as the sun, and you have a light bulb on the nose of your space ship.

Answer:

Dark and Light is always there

Explanation:

Think of it like an Angel and a Demon so basically there are colors all around us, and one of those colors is black so even if you were in the day if you block al sunlight out it would be dark then again there is artificial light so even if all light is blocked out light will always be there and Dark will also always be there hope this helped BTW I’m a fifth grader who goes to seventh grade sooo this should be correct(if you don’t understand I’m basically saying that the speed of Dark and Light is equal.

Answer:

29.436 J/g.°C

Explanation:

We are given;

Mass of tungsten; m_t = 215 g

Initial temperature of tungsten; T_ti = 100°C

Final temperature; T_f = 21.5°C

Mass of water; m_w = 450 g

Initial temperature of water; T_tw = 20°C

From tables, specific heat capacity of water; c_w = 4.184 J/g.C

Thus;

Energy lost by tungsten = energy gained by water

Thus;

215 × c_t × (100 - 21.5) = 450 × 4 184 × (21.5 - 20)

Where c_t is specific heat capacity of tungsten

16877.5c_t = 496800

c_t = 496800/16877.5

c_t = 29.436 J/g.C

Answer:

A ping pong ball

Explanation:

It has the lightest weight among the rest

As the distance from the surface of the Earth increases, gravitational potential energy increases. This is given by the formula for gravitational energy:

U = mgh, where U = gravitational potential energy, m = mass of object, g = gravity, and h = height. Since mass and gravity are constant for a specific object, only height changes, and thus, energy is directly proportional to height. If height increases, gravitational energy increases.

But since energy is always conserved (law of conservation of energy), as height increases, kinetic energy is converted into gravitational potential energy. i.e, as height increases, KE decreases, and GPE increases.

Answer:

According to the law of conservation of energy, energy is always conserved, as height increases, kinetic energy is converted into gravitational potential energy.

Explanation: