4. 2 Water vapour is a gas. Explain the difference and similarities between water in the vapour
form and in the liquid form in terms of the kinetic molecular theory (KMT). ​

Answer:

75kg dining table

Explanation:

its the heaviest

more force would be required to push it

so it has greater inertia

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Answer:

C.

Explanation:

EDGE 2023

Where a tap supplies water at 26°c while another supply at 82°c. If a man wishes to bath with water at 40°c, then the ratio of the mass of hot water to that of cold water is: 1/3.

The ratio of the mass of hot water to that of Cold water is determined as follows:

M₁C (82  40) = M₂C (40-26)

Where M₁C is the Mass of Tap 1; and

M₂C is the Mass of Tap 2.

Thus,

M₁C (82  40) = M₂C (40-26)

M₁/M₂ = 14/42

= 1/3

Thus, it is right to state that the ratio of the mass of hot water to that of cold water is: 1/3.

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An atomic mass unit (amu) is one-twelfth of the mass of an unbound carbon-12 atom, and it is used to express the mass of atomic and subatomic particles.

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Answer:

Wavelength = 3.74 m

Explanation:

In order to find wavelength in "metres", we must first convert megahertz to hertz.

1 MHz = 1 × 10⁶ Hz

80.3 Mhz = x

x = 80.3 × 1 × 10⁶ = 8.03 × 10⁷ Hz

The formula between wave speed, frequency and wavelength is:

v = fλ  [where v is wave speed, f is frequency and λ is wavelength]

Reorganise the equation and make λ the subject.

λ = v ÷ f

λ = (3 × 10⁸) ÷ (8.03 × 10⁷)

λ = 3.74 m [rounded to 3 significant figures]

To determine the reject rate (RR) for each scenario, we need to consider the capability indices Cp and Cpk along with the specifications for tensile strength. The reject rate represents the proportion of parts that do not meet the specifications.

1. RR = 0.27%

2. RR = 16.03%

3. RR = 0%

4. RR = 0.003%

5. RR = 0.27%

6. RR = 2.28%

7. RR = 29.93%

8. RR = 0%

9. RR = 5.87%

Please note that these calculations assume a normal distribution of tensile strength and that the process is in statistical control. The reject rate is obtained by evaluating the proportion of values falling outside the specified limits based on the process capability indices Cp and Cpk.

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Answer:

b

Explanation:

The second lens' image is located 66.7 cm behind the second lens.

Let's first find the location of the image formed by the first lens. Using the thin lens equation:

1/f = 1/do + 1/di

where f is the focal length of the lens, do is the object distance (distance of the object from the lens), and di is the image distance (distance of the image from the lens).

For the first lens, f = f and do = -30 cm (since the object is 30 cm in front of the lens). Let di1 be the image distance formed by the first lens.

1/f = 1/do + 1/di₁

1/f = 1/-30 + 1/di₁

1/f = -1/30 + 1/di₁

1/f + 1/30 = 1/di₁

1/f + 1/30 = 1/(20 + di₁) (since the image is formed halfway between the lenses, the distance between the lenses is 40 cm, so the image distance from the first lens is 20 cm)

Simplifying and solving for di₁:

di₁ = 20 cm

Now, this image acts as the object for the second lens. The distance between the two lenses is 40 cm, so the object distance for the second lens is:

do₂ = 40 - di₁

do₂ = 40 - 20

do₂ = 20 cm

Using the thin lens equation again for the second lens, with f = f and do = 20 cm, let di₂ be the image distance formed by the second lens.

1/f = 1/do + 1/di₂

1/f = 1/20 + 1/di₂

1/f - 1/20 = 1/di₂

1/f - 1/20 = 1/(di2 - 40) (since the image is formed behind the second lens, the image distance is di2 - 40)

Simplifying and solving for di₂:

di₂ = 66.7 cm

Therefore, the image formed by the second lens is located 66.7 cm behind the second lens.

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The distance of the trip that Kayak travelled at an average speed of 18 mph in 5 hour is 90 miles

First, we shall obtain the eqaution to determine the distance. This can be obtained as follow:

Speed is defined as:

Speed = distance / time

Cross multiply

Distance = speed × time

With the above formula, we can obtain the distance. Details below

The following data were obtained from the question:

Distance = speed × time

Distance = 18 × 5

Distance = 90 miles

From the above calculation, we conclude that the distance traveled is 90 miles

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Answer: Replace the orange light source with a higher frequency light source

Explanation:

To expel electrons from a piece of metal, the incoming light must have a minimum frequency to cause a photoelectric effect, i.e., the ejection of photoelectrons from a metal surface, which is also known as the metal's threshold frequency.

If v = frequency of incident photon and vth= threshold frequency, then,

Therefore, we would have to increase the frequency of incident light so that it becomes greater than the threshold frequency of that surface, and consequently a photoelectric process takes place.

Answer:

gravity

Explanation:

The kinetic energy of an object is half of the product of mass and square of velocity. Then, for a person with a kinetic energy of 1800 J and velocity of 12 m/s is 25 kg.

Kinetic energy of an object is generated by virtue of its motion. It is related to the mass and velocity by the expression as follows:

Ke = 1/2 m v².

Thus, as the mass or velocity increases, kinetic energy increases.

Given velocity of the person = 12 m/s

kinetic energy = 1800 J

1/2 m v² = 1800 J

The mass of the person can be then calculated as follows:

m = 2 Ke/v²

m = 1800 J × 2 / (12 m/s)²

m = 25 Kg.

Therefore, the mass of the person is 25 Kg.

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Let's sketch the problem to understand better:

Since the angle of reflection is congruent to the angle of incidence, we have r1 = i1 = 38.2°.

Now, let's calculate angle x, knowing that it is complementary to the angle r1:

To calculate angle y, let's add all angles in the triangle and equate the sum to 180°:

Angles i2 and y are complementary, so we have:

Since r2 and i2 are congruent, so the angle of reflection in the second mirror is 15.5°.

Answer:

C

Explanation:

it means there is a change in the velocity plz mark brainliest

Answer:

0.25N

Explanation:

k=0.5N/m

e=0.5m

f=?

were k=spring constant

e=extension

F=force

According to hooks law,

f=ke

f=0.5x0.5 =0.25 N

Answer:

About 250 Hz

Explanation:

People of All ages without a hearing impairment should be able to hear the 8000hz. People under 50 should be able to hear the 12,000hz and people under 40, the 15,000hz. Under 30s should hear the 16,000hz, and the 17,000hz is receivable for those under 24.

Answer:

its should be 2.0 and 4.5 on it

Answer:

0.1 miles

Explanation:

1mile/10 minutes

to get some miles/1 minute:

since you divided the 10 minutes to get 1 minute you also divide the 1 mile by 10 to get the number of miles per minutes

ei 1/10 = 0.1 miles

Answer: Down below is the answer in complete sentences!

Explanation:

PART A:

Gravity and Acceleration are two additional forces acting upon the sled.

PART B:

Gravity will affect the sled by pulling it down, since the slope of the hill is negative.

Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.

By being wary of these factors and following the recommended guidelines, you can ensure the safe and effective use of hemoconcentrators in medical procedures.

When using hemoconcentrators, it's essential to be cautious and consider a few factors to ensure their safe and effective use. Some things to be wary of with hemoconcentrators include:
1. Compatibility: Make sure the hemoconcentrator is compatible with your specific application and equipment to avoid any malfunctions or complications during the procedure.
2. Clotting risks: Hemoconcentrators can sometimes lead to increased blood clotting risks. Ensure appropriate anticoagulation measures are in place during the procedure to minimize this risk.
3. Flow rate: Be mindful of the blood flow rate through the hemoconcentrator. Exceeding the recommended flow rate could lead to hemolysis or other complications.
4. Sterility: Maintain a sterile environment and follow proper handling procedures to prevent contamination, which could potentially lead to infection.
5. Monitoring: Closely monitor the patient's vital signs, blood pressure, and fluid balance during the procedure to promptly identify and address any adverse reactions or complications.

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The acceleration of car from 4m/s to 30m/s in 3s is \(a = 8.67 m/s^2\).

The initial velocity of car is 4 m/s.

The final velocity of car is 30 m/s.

Time is 3 seconds.

The acceleration is defined as the change in velocity per unit time. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

The Newton's first equation of motion is written as,

\(a = \dfrac{v-u}{t}\)

Substituting the values for v, u and t, calculate the acceleration of car.

\(a = \dfrac{30-4}{3}\)

\(a = 8.67 m/s^2\)

The acceleration is 8.67 m/s^2.

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--The complete question is, A car accelerated from 4m/s to 30m/s in 3s. Calculate the acceleration.--

Answer:

Technology is the sum of techniques, skills, methods, and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific ... computer. As a cultural activity, technology predates both science and engineering, each of which formalize some aspects of technological endeavor.

Explanation:

The kinetic energy of the child at the bottom of the incline is 106.62 J.

The given parameters:

The vertical height of fall of the child from the top of the incline is calculated as;

\(sin(20) = \frac{h}{2} \\\\h = 2 \times sin(20)\\\\h = 0.68 \ m\)

The gravitational potential energy of the child at the top of the incline is calculated as;

\(P.E = mgh\\\\P.E = 16 \times 9.8 \times 0.68\\\\P.E = 106.62 \ J\)

Thus, based on the principle of conservation of mechanical energy, the kinetic energy of the child at the bottom of the incline is 106.62 J since no energy is lost to friction.

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Answer:

See below

Explanation:

If the cookie is irregular, it will have no fixed number as a radius----depending on where you measure from the center to the circumference, it could be one of several values---

  You COULD measure the circumference then perhaps the average diameter could be calculated as:   circumference/ pi = diameter

  then radius = 1/2 diameter

I think your teacher is saying the cookie is IRREGULAR in VOLUME (or thickness)  but not in SHAPE

 so you could use the method I mentioned above ....or you could use the AREA of the cookie ( rather than the VOLUME)

  AREA = pi r^2     then radius would be =  √ ( area / pi)

The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.

When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.

According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.

According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.

According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.

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Answer:As an equation, the tangential velocity is the distance, 2π r, divided by the time, T. Thus, A point on the circle moves a distance 2π r in a time T. We can extend our equation by looking at a few ideas. These concepts include the angular speed, ω, and the frequency, f. The angular speed, ω, is a speed of rotation.

Explanation:

i know

For incoming microwaves with a wavelength of approximately: 21.4 cm, the corners of the wall opposite the window will correspond to the first-order minima.

We need to find the wavelength of incoming microwaves that will cause the corners of the wall opposite the window to correspond to first-order minima, given the window width is 30.3 cm and the room is square.

To solve this, we can use the formula for single-slit diffraction:
sin(θ) = (mλ) / a
where θ is the angle of diffraction,
m is the order of the minima (in this case, m = 1 for the first-order minima),
λ is the wavelength of the incoming microwaves, and
a is the width of the window.

Since the room is square, we know that the angle θ is 45 degrees (half of 90 degrees). We can now solve for the wavelength λ:
sin(45°) = (1 * λ) / 30.3 cm

To find λ, we can rearrange the formula:
λ = 30.3 cm * sin(45°)

Now, we can calculate the wavelength:
λ ≈ 30.3 cm * 0.7071 (since sin(45°) ≈ 0.7071)
λ ≈ 21.4 cm

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Answer:

where is the multiple choice?

Answer:

Approximately \(1.79 \times 10^{5}\; {\rm N \cdot m^{-1}}\), assuming friction between the vehicle and the ground is negligible.

Explanation:

Let \(m\) denote the mass of the vehicle. Let \(v\) denote the initial velocity of the vehicle. Let \(k\) denote the spring constant (needs to be found.) Let \(x\) denote the maximum displacement of the spring.

Convert velocity of the vehicle to standard units (meters per second):

\(\begin{aligned}v &= 20.8\; {\rm km \cdot h^{-1}} \times \frac{1000\; {\rm m}}{1\; {\rm km}} \times \frac{1\; {\rm h}}{3600\; {\rm s}} \\ &\approx 1.908\; {\rm m \cdot s^{-1}}\end{aligned}\).

Initial kinetic energy (\({\rm KE}\)) of the vehicle:

\(\begin{aligned}\frac{1}{2}\, m \, v^{2}\end{aligned}\).

When the vehicle is brought to a rest, the elastic potential energy (\(\text{EPE}\)) stored in the spring would be:

\(\displaystyle \frac{1}{2}\, k\, x^{2}\).

By the conservation of energy, if the friction between the vehicle and the ground is negligible, the initial \(\text{KE}\) of the vehicle should be equal to the \({\rm EPE}\) of the vehicle. In other words:

\(\begin{aligned}\frac{1}{2}\, m \, v^{2} &= \frac{1}{2}\, k\, x^{2}\end{aligned}\).

Rearrange this equation to find an expression for \(k\), the spring constant:

\(\begin{aligned}k &= \frac{m\, v }{x^{2}}\end{aligned}\).

Substitute in the given values \(m = 1508\; {\rm kg}\), \(v \approx 1.908\; {\rm m\cdot s^{-1}}\), and \(x = 6.87\; {\rm m}\):

\(\begin{aligned}k &= \frac{m\, v }{x^{2}} \\ &\approx \frac{1508\; {\rm kg} \times 1.908\; {\rm m\cdot s^{-1}}}{(6.87\; {\rm m})^{2}} \\ &\approx 1.79 \times 10^{5}\; {\rm kg \cdot m \cdot s^{-2} \cdot m^{-3}}\\ &\approx 1.79 \times 10^{5}\; {\rm N \cdot m^{-1}}\end{aligned}\)

The correct restart is for there to be another kick off taken in this type of scenario.

This is a method of restarting play in which the ball is put on the center circle and passed by a player.

Kick offs occur at the beginning of any halves or when a goal is scored during the match which is why it's the most appropriate choice.

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Answer:Kick offs occur at the beginning of any halves or when a goal is scored during the match which is why it's the most appropriate choice.

Explanation: