A 4.28 m deep well acts as a
closed pipe. When wind blows
across the top, what is the
fundamental frequency it creates?
(Speed of sound = 343 m/s)
(Unit = Hz)

Answer:

In the particle model, the object in motion is represented by a series of single points. A time interval is the difference between two locations. A vector has both location and direction. The zero point in a coordinate system is called the resultant.

To car 1, car 2's relative velocity is 20+30 to the north. Since car 1 is moving 20mph south, the world around it is moving 20mph north, and since car 2 is heading 30mph north, that gets added to the 20mph frame of reference for car 1.

Answer: 50mph north

Let's check the formula for a focal length:

Since basically the two lenses have the same form, we can conclude that R1,R2 and d are the same. But n ( refractive index) could be different. n depends on the material, so we can conclude that the answer is:

A.

Lens A and lens B are made from two different materials with different optical properties.

Answer:

A strong acid

Explanation:

PH is a scale that measures the acidity or nativity of any substance being tested. PH is mostly usually carried out in aqueous solutions also.

The scale is from 1 - 14, with 7 being neutral. A solution with a PH of 7 is said to be chemically neutral. On the other hand, a solution with a PH of 2 is tagged as a strong acid. This is so, because on the scale, the more closer you move to 1, the acidity of such solution increases and the more you move to 14, it's basicity reduces. And as such, only solutions with a PH value of 1 are stronger than that of 2.

Example of a solution with a PH of 2 is a lemon juice.

Answer:

The answer is a Strong acid btw I took the test its right

Explanation:

PH is a scale that measures the acidity or nativity of any substance being tested. PH is mostly usually carried out in aqueous solutions also.

The scale is from 1 - 14, with 7 being neutral. A solution with a PH of 7 is said to be chemically neutral. On the other hand, a solution with a PH of 2 is tagged as a strong acid. This is so, because on the scale, the more closer you move to 1, the acidity of such solution increases and the more you move to 14, it's basicity reduces. And as such, only solutions with a PH value of 1 are stronger than that of 2.

Example of a solution with a PH of 2 is a lemon juice.

The force required to stop the car of mass 3250 kg is -12195.12 N.

Force is the product of mass and acceleration.

To calculate the force required to stop the car, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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Explanation:

The velocity of light in a medium of refractive index \(n\( is given by,

\(v=\frac{c}{n}\)

\(v \text { is the velocity of light in the medium }\)

\(c \text { is speed of light in vacuum }\)

The exact value of speed of light in vacuum is \(299792458 \mathrm{m} / \mathrm{s}\).

For Cherenkov radiation to be emitted, the velocity of the charged particle traversing the medium must be greater than this velocity. Thus, the threshold velocity of for creating Cherenkov radiation is,

\(v_{\text {Cherenkov }} \geq \frac{c}{n}\)

\(v_{\text {threshod }}=\frac{c}{n}\)

For water \(n=1.33,\( thus the threshold velocity for producing Cherenkov radiation in water is,

\(v_{\text {threatold }(\text { water })} &=\frac{299792458 \mathrm{m} / \mathrm{s}}{1.33}\)

\(=225407863 \mathrm{m} / \mathrm{s}\)

\(=2.254 \times 10^{8} \mathrm{m} / \mathrm{s}\)

For ethanol \(n=1.36\(, thus the threshold velocity for producing Cherenkov radiation in water is,

\(v_{\text {threstold }( \text { ettanol) } } &=\frac{299792458 \mathrm{m} / \mathrm{s}}{1.36}\)

\(=220435630 \mathrm{m} / \mathrm{s}\)

\(=2.204 \times 10^{8} \mathrm{m} / \mathrm{s}\)

Answer:

The answer is "2.2 × \(\bold{10^8}\)".

Explanation:

In the given question the value of n is missing which can be defined as follows:

n= 1.36

The velocity value of the threshold(ethanol) for a generation the Cerenkov light from the charged particle by travel through ethanol as:

know we will have to use an equation as follows:

Formula:      

(ethanol) or the vthreshold = \(\frac{c}{n}\)

                                         \(= \frac{3\times 10^8} {1.36} \\\\= 2.2 \times 10^8\)

The water in vthreshold:

\(= 2.2 \times 10^8 \ \ \frac{m}{ s} \\\\\)

Express the value in c, that is multiple, so, the value of vthreshold(water) is:

=(0.735) c

The height of the 4 kilograms book with a gravitational potential energy of 98 Joules is approximately 2.5 meters.

Gravitational potential energy is simply the potential energy an object possessse in relation to another object due to gravity.

It is expressed as;

U = m × g × h

Given that:

Gravitational potential energy of the book U = 98 Joules

Mass of the book m = 4 kilograms

Acceleration due to gravity g = 9.8 m/s²

Height h = ?

Plug these values into the above formula and solve for height.

U = m × g × h

h = U / ( m × g )

h = 98  / ( 4 × 9.8 )

h = 98/39.2

h = 2.5 meters

Therefore, its height is 2.5 meters.

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The boat must have moved, despite not being seen to move, because its relative position to the dock has changed. This phenomenon is known as relative motion .

Everything is always in motion, but the way we perceive it depends on our frame of reference.

In this scenario, the dock was the frame of reference for the initial position of the boat. When the boat moved to the cove, its position relative to the dock changed, and the dock was no longer an appropriate frame of reference. The boat's motion is now relative to the cove instead.

It is important to note that relative motion depends on the chosen frame of reference. If we were to choose the boat as the frame of reference, then it would be the dock that appears to move, not the boat. This is because motion is always relative to a chosen frame of reference.

In conclusion, the boat must have moved because its position relative to the dock changed. The concept of relative motion reminds us that motion is always relative to a chosen frame of reference, and that the way we perceive motion depends on our chosen frame of reference.

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67108.1 miles/hour is 30 km/s.

While converting 30km/s to miles/hours is 67108.1 miles/hour.

What is miles/ hour?

In the imperial system, the number of statute miles traveled in a single hour is expressed in miles per hour. On American and British highways, it is currently the accepted unit for speed restrictions and for expressing speeds in general. It is frequently used to describe the velocity at which a ball is delivered in a variety of sports, including baseball, tennis, and cricket. MPH or mph is a typical abbreviation.

What is km/s?

A measure of speed that expresses the number of kilometers covered in one second is called kilometers per second.

In the metric system, the kilometer per second, also known as kilometer per second, is a SI unit of speed. The abbreviation for kilometres per second is km/s, though it can also be written as km/sec.

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Answer:

asdasd dsa dasdasd sadas dasd asdasd asd asd dsa asdd 223 aasd ada dasd sa dasd dsaa sd adsd asasd

Explanation:

Answer:

germany

Explanation:

Hi there!

The Amplitude is the 'A' value of the following SHM equation:

\(x(t) = Asin(\omega t)\)

Thus, the amplitude of this object:

A = 0.50 m

The period of vibration is equivalent to:

\(T = \frac{2\pi}{\omega}\)

In this instance:

\(\omega = \frac{\pi}{2}\)

Therefore:

\(T = \frac{2\pi}{\frac{\pi}{2}} = \frac{4\pi}{\pi} = \boxed{\text{ 4 seconds.}}\)

Answer:the answer would be C.50N

Explanation:I just took the test

Answer:

50n

Explanation:

This question involves the concepts of the thin lens formula, focal length, and image distance.

The image of the house is "16 ft" away from the lens.

According to the thin lens formula:

\(\frac{1}{f}=\frac{1}{p}+\frac{1}{q}\)

where,

f = focal length = 8 ft

p = object distance = 16 ft

q = image distance = ?

Therefore,

\(\frac{1}{8\ ft}=\frac{1}{16\ ft}+\frac{1}{q}\\\\\frac{1}{q}=\frac{1}{8\ ft}-\frac{1}{16\ ft}\\\\\frac{1}{q}=0.125\ ft^{-1}-0.0625\ ft^{-1}\\\\q=\frac{1}{0.0625\ ft^{-1}}\\\\\)

q = 16 ft

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Answer:

True

Explanation:

Answer:

Invasive plants also degrade the environment by changing the species composition and the ecology of invaded ecosystems

Explanation:

Answer:

they can harm the enviroment by changing the species composition and the ecology of invaded ecosystems !!

The original two light bulbs will appear brighter when the third resistor is added in parallel.

When a third resistor is added in parallel to the other two resistors in a circuit, it will have an impact on the overall brightness of the original two light bulbs.

In a parallel circuit, each resistor has its own branch connected to the power source. The current flowing through each branch is inversely proportional to the resistance of that branch. Adding a third resistor in parallel means an additional path for current to flow.

The introduction of the third resistor reduces the total resistance of the circuit. As a result, the total current drawn from the power source increases, as per Ohm's Law (I = V/R). The increased current is distributed among the parallel branches, including the original two light bulbs.

Since the current through the bulbs is now greater, their brightness will also increase. This is because the brightness of an incandescent light bulb is directly proportional to the current passing through it.

It's worth noting that the specific effect on brightness depends on the resistance values of the resistors and the characteristics of the light bulbs. However, in general, adding a resistor in parallel reduces the overall resistance, increases the current, and subsequently enhances the brightness of the light bulbs in the circuit.

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Answer:

the potential energy decreases as it is converted to kinetic energy.

Explanation:

As things move, their potential energy converts to kinetic energy to power them along. When a ball rolls down the top of a ramp, all the potential energy it accumulated at the top of the ramp converts to kinetic energy to help it roll down. In other words, its potential energy decreases as its kinetic energy increases.

Answer:

Explanation:

In this problem, we are required to solve for the total distance that the car travelled. and the displacement

A) the distance travelled by car

this can be gotten by summing all the distances the car has travelled.

i,e total distance= 60 miles+120 miles

total distance= 180 miles

B) the displacement of the car

the displacement can be gotten by  subtracting the final distance from the initial distance

final distance = 120 miles

initial distance= 60 miles

displacement= 120-60= 60 miles

Beta decay is seen in the nuclear reaction: ⁹⁰₃₉Y → ⁹⁰₄₀Zr + ⁰₋₁e. Hence, option (A) is correct.

A proton can change into a neutron or vice versa inside the radioactive sample's nucleus through a process known as beta decay.

The radioactive sample's nucleus can approach the ideal neutron/proton ratio as closely as feasible through processes like beta decay and alpha decay. The nucleus releases a beta particle during this process, which can either be an electron or a positron.

As electron releases here, it is a Beta (β) decay.

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30=5×h then divide both sides by 5 you will get h=6m

If a 5 N object at a height has a gravitational potential energy of 30 J , then the height of the object would be  6 meters.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.

As given in the problem a 5 N object at a height has gravitational potential energy of 30 J, then we have to find the height of the object.

Similarly, the total gravitational  potential energy of the object,

PE = m × g × h

30  = 5 × h

h  = 30 / 5

h  = 6 meters

Thus, if a 5 N object at a height has a gravitational potential energy of 30 J, then the height of the object would be  6 meters.

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This question involves the concept of  Newton's law of gravitation.

The force of gravity between the two spaceships is "1355.78 N".

According to Newton's Law of Gravitation:

\(F=\frac{Gm_1m_2}{r^2}\)

where,

Therefore,

\(F=\frac{(6.67\ x\ 10^{-11}\ N.m^2/kg^2)(500\ kg)(498\ kg)}{(35\ m)^2}\\\\\)

F = 1355.78 N = 1.356 KN

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Two space ships traveling next to each other. The first one is 500 kg and the second one is 498 kg. They are 35 meters apart, the Force of gravity between the two spaceships is 1355.78 N.

It is given that the First spaceship's weight (\(m_{1}\)) is 500 kg,

The second spaceship's weight (\(\rm m_{2}\)) is 498 kg.

The distance between spaceships (r) is 35 meters.

It is required to find the Force of gravity between these spaceships.

It is defined as the force which attracts any two masses in the universe.

By Newton's law of Gravitation:

\(\rm F= \frac{Gm_1m_2}{r^2}\)  , Where

\(\rm F = The\ force \ of \ gravity \ between \ the \ spaceships\\\rm G= Universal\ Gravitational \ Constant = 6.67 \times 10^{-11} N.m^2/kg^2\)

Putting values in the above formula:

\(\rm F = \frac{(6.67\times 10^{-11} N.m^2/kg^2)(500kg)(498kg)}{(35m)^2}\)

F = 1355.78 N = 1.356  KN

Thus, Two spaceships travel next to each other. The first one is 500 kg and the second one is 498 kg. They are 35 meters apart, the Force of gravity between the two spaceships is 1355.78 N.

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Answer:

\(220833.33\ \text{m/s}\)

Explanation:

\(E\) = Electric field = \(106\ \text{kV/m}\)

\(B\) = Magnetic field = \(0.48\ \text{T}\)

Velocity is given by

\(v=\dfrac{E}{B}\)

\(\Rightarrow v=\dfrac{106\times 10^3}{0.48}\)

\(\Rightarrow v=220833.33\ \text{m/s}\)

The velocity of the particle is \(220833.33\ \text{m/s}\).

Answer:

The correct answer will be:

(a) 2.2 rad/s

(b) 2.2 rad

Explanation:

The given values are:

Angular acceleration, \(\alpha = 0.35 \pi \ rad/s^2\)

(a)...

At time t = 2.0 s,

The angular velocity will be:

⇒  \(\omega = \alpha t\)

On putting the estimated values, we get

⇒     \(=0.35\pi \times 2.0\)

∴ [\(\pi = 3.14\)]

⇒     \(=0.35\times 3.14\times 2.0\)

⇒     \(=2.2 \ rad/s\)

(b)...

The angular displacement will be:

⇒  \(\theta = \frac{1}{2}\alpha t^2\)

On putting the estimated values, we get

⇒     \(=\frac{1}{2}\times 0.35\pi\times (2.0)^2\)

⇒     \(=\frac{1}{2}\times 0.35\times 3.14\times 4\)

⇒     \(=1.099\times 2\)

⇒     \(=2.2 \ rad\)

We will determine that the weight of the man would be:

So, the weight of the person is 490 N.

Answer:

Of course we feel bad or angry.

Explanation:

that it what i know....

Answer:

1.1111.22222

Explanation: