During a match of tennis, a 0.0585-kg tennis ball travelling at 19.4 m/s [W] is struck horizontally. The paddle exerts eastward force of 24N [E] over a time of 0.15s Determine the velocity of the ball after the collision

A)  The speed of the radar waves = 3 x 10^8 m/s

B)  The distance between the aircraft and the target is 27 km.

C) It takes 100 seconds for the aircraft to be vertically above the target.

(a) The speed of the radar waves can be found using the formula:

speed of light = frequency x wavelength

Since radar waves are a type of electromagnetic waves and travel at the speed of light, we can use the above formula to find the speed of the radar waves:

speed of radar waves = speed of light = 3 x 10^8 m/s

(b) To find the distance AT between the aircraft and the target, we can use the formula:

distance = (speed x time) / 2

where speed is the speed of the radar waves (which we found to be 3 x 10^8 m/s), and time is the time taken for the radar waves to travel to the target and back (which is twice the time it took for the echo to be detected on the aircraft).

time taken for radar waves to travel to target and back = 2 x 90 us = 180 us = 1.8 x 10^-4 s

So, the distance between the aircraft and the target can be calculated as:

distance AT = (speed of radar waves x time taken for radar waves to travel to target and back) / 2

= (3 x 10^8 m/s x 1.8 x 10^-4 s) / 2

= 27 km

Therefore, the distance between the aircraft and the target is 27 km.

(c) To find the time which elapses before A is vertically above T, we can use the formula:

time = distance / speed

where distance is the horizontal distance between the aircraft and the target (which we found to be 27 km), and speed is the speed of the aircraft (which we were not given, but we can assume is constant).

Since the aircraft is flying at a constant speed, the time it takes to travel the horizontal distance between the aircraft and the target is the same as the time it takes for the aircraft to be vertically above the target. Therefore, the time which elapses before A is vertically above T is:

time = distance / speed

= 27 km / (270 m/s)

= 100 s

Therefore, it takes 100 seconds for the aircraft to be vertically above the target.

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Answer: The ability to do work.

Explanation: Scientists define energy as the ability to do work. There is potential energy (where an object at rest has the capacity to have motion) and kinetic energy (where an object is in motion).

Answer:

Approximately \(1.04 \; {\rm J \cdot g^{-1} \cdot K^{-1}}\).

Explanation:

Multiply energy input by efficiency to find the useful energy output:

\(\begin{aligned}& (\text{useful out}\text{put}) \\ &= (\text{efficiency})\, (\text{energy in}\text{put}) \\ &= (87.5\%)\, (1560\; {\rm kJ}) \\&= (0.875)\, (1560\; {\rm kJ}) \\ &= 1365\; {\rm kJ}\end{aligned}\).

In other words, \(1365\; {\rm kJ}\) of energy was supplied to the air in the building.

The standard unit of energy is Joules (\({\rm J}\).) Apply unit conversion:

\(\begin{aligned}(1365\; {\rm kJ})\, \left(\frac{10000\; {\rm J}}{1\; {\rm kJ}}\right) = 1.365\times 10^{6}\; {\rm J}\end{aligned}\).

Let \(c\) denote the specific heat capacity of the air in this building. Let \(m\) denote the mass of the air.

Let \(Q\) denote the energy supplied to the air. Let \(\Delta T\) denote the change in temperature. The equation \(Q = c\, m\, \Delta T\) relates these quantities.

In this question, the change in the temperature of the air in this building is:

\(\Delta T = (22.1\; {\rm ^{\circ} C}) - (11.6\; {\rm ^{\circ} C}) = 10.5\; {\rm K}\).

Rearrange the equation \(Q = c\, m\, \Delta T\) to find specific heat capacity \(c\):

\(\begin{aligned}c &= \frac{Q}{m\, \Delta T} \\ &= \frac{1.365 \times 10^{6}\; {\rm J}}{(125\; {\rm kg})\, (10.5\; {\rm K})} \\ &\approx 1.04 \times 10^{3}\; {\rm J \cdot kg^{-1} \cdot K^{-1}}\end{aligned}\).

The set of quantum numbers (n, l, ml, ms) that refers to an electron in a 3d orbital is 4, 3, 1, -1/2. Option C is the correct answer.

The quantum numbers (n, l, ml, ms) describe the properties of an electron in an atom. For an electron in a 3d orbital, the correct set of quantum numbers is (4, 2, -2, +1/2).

The principal quantum number (n) represents the energy level or shell of the electron. In this case, it is 4.

The azimuthal quantum number (l) specifies the subshell or orbital shape. For a 3d orbital, it is 2.

The magnetic quantum number (ml) determines the orientation of the orbital within the subshell. Here, it is -2.

The spin quantum number (ms) describes the spin state of the electron. It can be either +1/2 or -1/2, and for this case, it is +1/2.

Therefore, option C) 4, 2, -2, +1/2 refers to an electron in a 3d orbital.

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Answer:

a force is a movement on a object such as kinetic energy

A point's sound intensity level is expressed in logarithmic units of decibels (dB) as a ratio between the sound there and the threshold of hearing.

Whispering is audible at 30 dB. 40 dB: Quiet sounds from the library. Fridge at 50 dB. Electric toothbrush at 60 decibels.

In decibels, sound is measured (dB). A motorcycle engine running is around 95 dB louder than a whisper (30 dB louder than typical conversation). Long-term exposure to noise levels above 70 dB may cause hearing impairment. Your ears may get immediately harmed by loud noises over 120 dB.

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The bulk modulus of the liquid is 13.31 GPa.

The bulk modulus of a substance is the degree of ways immune to compression the substance is. it's miles defined because of the ratio of the infinitesimal stress boom to the ensuing relative decrease of the volume.

Young's Modulus is the ability of any fabric to withstand the change along its duration. Bulk Modulus is the potential of any fabric to face up to the alternate in its extent. once in a while known as incompressibility, the majority modulus is a degree of the potential of a substance to withstand changes in extent while underneath compression on all aspects. it is the same to the quotient of the implemented strain divided by the relative deformation.

Calculation:-

ρ = 1300 kg/m3 , f = 400 Hz , \small \lambda = 8 m

We know that speed can be given as :

v = \small \lambda*f

i.e. calculating speed as :

v = (8 m)*(400 Hz) = 3200 m/s

The relation between  speed, Bulk modulus, and density is :

v = \small \sqrt(K/\small \rho)

Calculating Bulk modulus as :

K = v2*\small \rho

 = (3200 m/s)2*(1300 kg/m3)

= 13.31× 109 Pa = 13.31 GPa

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Hello!

\(\large\boxed{4 m/s}\)

Find the change in velocity by finding the area under the line in an acceleration v. time graph:

We can divide the area underneath the interval 1 - 2 seconds into a rectangle and a triangle. Use the formulas:

A = l × w

A = 1/2(b · h)

We can solve for the rectangle first:

A = 2 × 1 = 2

Do the remaining area using the formula for a triangle:

A = 1/2 (2 · 2) = 2

Add the areas together:

2 + 2 = 4 m/s.

The Δv (change in velocity) is 4 m/s.

The frequency of the lowest tone that will resonate in an open pipe of length 2l is 200 Hz. The resonant frequencies of an open pipe are determined by the fundamental frequency, which is inversely proportional to the length of the pipe.

When the length is doubled, the fundamental frequency is halved. In this case, the original pipe had a fundamental frequency of 400 Hz, so when the length is doubled to 2l, the new fundamental frequency becomes 200 Hz. This relationship holds true for open pipes because they support standing waves with nodes at both ends, resulting in a wavelength that is twice the length of the pipe.

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Answer:

It's D: None of the above.

Explanation:

I looked up the components of soil and all of them were, and I also took the test and got it correct.  

The amount of net income for Year 2 is $30,000

The amount of net income for Year 2 can be calculated using the formula:

Net Income = (Ending Retained Earnings + Dividends Paid) - Beginning Retained Earnings

Where:

Ending Retained Earnings = Retained Earnings on December 31, Year 2
Dividends Paid = $30,000 (given in the question)
Beginning Retained Earnings = Retained Earnings on December 31, Year 1

Let's substitute the values in the formula and calculate:

Net Income = ($82,000 + $30,000) - $82,000
Net Income = $30,000

Therefore, the amount of net income for Year 2 is $30,000.

- The formula to calculate net income is (Ending Retained Earnings + Dividends Paid) - Beginning Retained Earnings
- Ending Retained Earnings is the Retained Earnings on December 31, Year 2, which is given as $82,000 in the question
- Dividends Paid during Year 2 is given as $30,000 in the question
- Beginning Retained Earnings is the Retained Earnings on December 31, Year 1, which is not given in the question but can be calculated by subtracting the total of liabilities and common stock from the total assets as follows:
Beginning Retained Earnings = Total Assets - Total Liabilities - Common Stock
Beginning Retained Earnings = $122,000 - $31,000 - $28,000
Beginning Retained Earnings = $63,000
- Now that we have all the values, we can substitute them in the formula and calculate the net income for Year 2
- Net Income = ($82,000 + $30,000) - $63,000
- Net Income = $30,000

In conclusion, the amount of net income for Year 2 is $30,000. This was calculated using the formula (Ending Retained Earnings + Dividends Paid) - Beginning Retained Earnings, where Ending Retained Earnings and Dividends Paid were given in the question, and Beginning Retained Earnings was calculated by subtracting the total of liabilities and common stock from the total assets on the balance sheet.

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An unopened bag of chips expanding as one drives up a mountain is a good example of how volume increases when pressure decreases.

When driving up a mountain, the atmospheric pressure decreases due to the decrease in air density at higher altitudes. As the external pressure decreases, the air inside the bag of chips exerts a higher pressure relative to the lower external pressure.

This pressure difference causes the bag to expand, increasing its volume. Therefore, the volume increases when the pressure decreases in this scenario.

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answer

200

Explanation:

5000-5200=200

The phase difference between the waves arriving at point P from antennas A and B is approximately 34.5 radians.

Δφ = 2πΔx/λ

We can calculate the wavelength of the radio waves using the formula:

λ = c/f

λ = c/f = \(\frac{3*10^{8} }{97.0*10^{6} } = 3.09m\)

Now we can calculate the phase difference:

Δx = \({(d^2+x^2)^0.5}-x\) =\([(9.30 m)^2 + (75.0 m)^2]^0.5 - 75.0 m\) ≈ 16.9 m

Δφ = 2πΔx/λ = 2π(16.9 m)/(3.09 m) ≈ 34.5 radians

The phase difference is a concept in physics that refers to the difference in the timing or position of two oscillations or waves. When two waves with the same frequency and amplitude are superimposed, they can either add constructively or destructively, depending on their phase relationship. If the waves are in phase, meaning their peaks and troughs line up perfectly, they will add constructively and result in a wave with twice the amplitude.

However, if the waves are out of phase, meaning their peaks and troughs do not align, they will add destructively and result in a wave with zero amplitude. Phase difference is usually expressed in terms of degrees or radians. A phase difference of 180 degrees (or pi radians) means that the waves are completely out of phase, while a phase difference of 0 degrees (or 2*pi radians) means that they are in phase.

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If you add something, you are being positive; if you subtract something, you are being negative.

Whatever is shown in the media should be properly understood by the audience. The connection between the audience and the message is referred to as "meaning" in communication terminology. This point of view asserts that what ultimately determines how people act are their inner perceptions.

Media representations refer to the ways in which the media presents particular communities, experiences, ideas, or topics from a particular ideological or value perspective.

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Answer:

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Answer:

Conflict resolution is the process by which two or more parties reach a peaceful resolution to a dispute. In the workplace, there can be a variety of types of conflict: Conflict may occur between co-workers, or between supervisors and subordinates, or between service providers and their clients or customers.

The term conflict resolution implies the process of seeking effective and plausible settlement in conflict situations between aggrieved parties.

The term conflict in itself refers to a disagreement between two or more parties. Conflicts are common in human parlance. An example is the current conflict between Russia and Ukraine in recent times.

The term conflict resolution implies the process of seeking effective and plausible settlement in conflict situations between aggrieved parties.

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Light will reflect at the same angle off a smooth surface as when it first touches it. The direction of reflected light beams for a flat surface is the same. Specular reflection is what is happening here.

When light reflects off of a surface, it happens. Light will reflect at the same angle it was incident upon if the surface is glossy and smooth.

A smooth polished surface is what is referred to as a reflection when a light ray strikes it and bounces back. Surface reflection occurs when a light beam hits it and then leaves it.

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Answer: The part of color that's reflected is the red that bounces off the paper.

Hope this helps you!!!

(☞ﾟヮﾟ)☞      ☜(ﾟヮﾟ☜)

The ratio of the speeds of ship B to ship A relative to the space station is approximately 0.647.

The observer on the space station measures the length of the meterstick in both ship A and ship B using a telescope. The measured length of the meterstick in ship A is 0.85 m, while in ship B, it is 0.55 m.

To find the ratio of the speeds of ship B to ship A relative to the space station, we can use the given measurements:

uB/uA = (length of meterstick in ship B) / (length of meterstick in ship A)

    = 0.55 m / 0.85 m

    ≈ 0.647

Therefore, the ratio of the speeds of ship B to ship A relative to the space station is approximately 0.647.

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Answer:

5N NORTH

Explanation:right on edge

Answer:

The graph would increase constantly as shown above until it reached 50m/s. At 10s, the graph would be flat at 50m/s until 20s.

Explanation:

Most stars take millions of years to die. When a star like the Sun has burned all of its hydrogen fuel, it expands to become a red giant then when it fully runs out it then dies

Answer:

. When the core runs out of hydrogen fuel, it will contract under the weight of gravity.

Explanation:

William Herschel thought he had found a comet when he spotted the green disk of Uranus.

Uranus is the seventh planet located far away from the Sun. It is a gaseous planet which was discovered in 1781, mistaken by a comet but after two years it was accepted as a planet. After decades of observations and only one close visit by a spacecraft, which shows us that Uranus has unique atmosphere.

Atmosphere of Uranus is mostly made up of hydrogen and helium as well as a small amount of methane and traces of water and ammonia. The presence of methane gas gives blue colour to Uranus so we can conclude that Uranus is the planet which was thought first a comet by William Herschel.

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Answer:

\(\boxed{0}\)

Explanation:

Momentum is the measure of mass in motion.

\(\sf momentum = mass \times velocity\)

An object at rest has a velocity of 0.

\(p=mv\)

\(p = 25 \times 0\)

\(p=0\)

The momentum of an object at rest is always 0.

Answer:

with teamwork

Explanation:

you need to use team work so the right answer is C

A. The water will shoot out of the hole at a speed of 7.5 x 10⁻² m/s. B. The water will shoot out of the hole at a speed of 8.3895 m/s when the diameter of the hole is three times as large.

Part A: The volume of water entering the fountain per second is 7.5 x 10-2 m3. The diameter of the hole is 4.55 cm. The area of the hole is given by;

A=πr²

Where; r = d/2

Substituting the values of diameter and π into the equation, we get;

A = π x (4.55/2)²

A = π x 2.275²

A = 16.26 cm²

We convert the area to meters² so as to make the units of volume the same.

V= A x V_1

V= 16.26 cm² x (7.5 x 10⁻² m³/s) x (10⁻⁴ m²/cm²)V = 1.2195 x 10⁻⁴ m³/s

To find how fast the water will shoot out of the hole, we use the continuity equation;

A₁V₁ = A₂V₂

Where; A₁ and V₁ are the area and velocity of the water entering the hole respectively. A₂ and V₂ are the area and velocity of the water exiting the hole respectively.

Since water is incompressible, the volume of water entering is the same as that exiting.

A₁V₁ = A₂V₂

V₂ = A₁V₁/A₂

Where; A₁ = πr₁² = π(4.55/2)² = 16.26 cm²

V₁ = 7.5 x 10⁻² m³/s

A₂ = πr₂² = π(4.55/2)² = 16.26 cm² (assuming the hole is circular)

V₂ = (16.26 cm² x 7.5 x 10⁻² m³/s)/(16.26 cm²)

V₂ = 7.5 x 10⁻² m/s

Therefore, the speed is 7.5 x 10⁻² m/s.

Part B: If the diameter of the hole is three times as large, then the radius of the hole will also be three times as large. That is;

r₂ = 3r₁ = 3(4.55/2) cm = 6.825 cm

The area of the hole is given by;

A₂ = πr₂²

A₂ = π(6.825/100)² m²

A₂ = 1.464 x 10⁻⁴ m²

Substituting the values into the continuity equation;

V₂ = A₁V₁/A₂

V₂ = (16.26 cm² x 7.5 x 10⁻² m³/s)/(1.464 x 10⁻⁴ m²)

V₂ = 8.3895 m/s

Therefore, the speed is 8.3895 m/s when the diameter of the hole is three times as large.

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Answer:

The aeroplane flew 4200 miles for 7 hours.

600 times 7 is 4200.

Answer:

The final position is  (2, 7)m

Explanation:

When we work with coordinate pairs, the addition works as:

(a, b) + (c, d) = (a + c, b + d)

So, for example, if we start at (a, b), and we have a displacement d = (1, 1)

we just need to solve:

(a, b) + (1, 1) = (a + 1, b + 1)

Now, in this case, we start at (4, 4)m

first, we have d1 = (2, -3) m

After this displacement, the position is:

(4, 4)m + (2, -3)m = (4 + 2, 4 - 3)m = (6, 1)m

Now we have a displacement d2 = (-5, 0) m

After this, the position is:

(6, 1)m + (-5, 0)m = (6 -5, 1 + 0)m = (1, 1)m

After this, we have the final displacement d3 = (1, 6) m, so the final position will be:

(1, 1)m + (1, 6)m = (1 + 1, 1 + 6)m = (2, 7)m

Below you can see a rough sketch of the path that the student take, where he/she starts at point A.

Answer:The equation is balanced for both charge and nucleon number, as required.

Explanation:2713Al + 42He → 3015P + n