I’ll give brainliest and 10 points

Sampling is the process of selecting a subset of individuals or items from a larger population in order to gather information or make inferences about the whole population. This method allows researchers to collect data from a smaller group, which is more efficient and cost-effective than collecting data from the entire population.

Sampling is a crucial process in research because it helps ensure that the data collected is representative of the population and reduces the potential for bias. There are several types of sampling methods, including random sampling, stratified sampling, and convenience sampling. The choice of sampling method depends on the research question, the population being studied, and the resources available to the researcher. The accuracy of the data obtained from a sample depends on the sample size and the sampling method used. A larger sample size is generally more representative of the population and reduces the margin of error, while a smaller sample size may be more susceptible to sampling bias.

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Venus completes around 3 orbits for every orbit of Mars, given their respective orbital periods of 0.615 years and 1.88 years.

Venus and Mars have different orbital periods, with Venus completing one orbit around the Sun in approximately 0.615 years, while Mars takes about 1.88 years to complete its orbit. To determine the number of Venus orbits for each Mars orbit, we can divide the orbital period of Mars by that of Venus.

By dividing the orbital period of Mars (1.88 years) by the orbital period of Venus (0.615 years), we get approximately 3.06. This means that Venus completes about 3 orbits for each orbit of Mars.

Venus and Mars are both planets in our solar system, and each has its own unique orbital period, which is the time it takes for a planet to complete one orbit around the Sun. The orbital period of Venus is approximately 0.615 years, while the orbital period of Mars is about 1.88 years.

To determine the number of orbits Venus makes for each Mars orbit, we divide the orbital period of Mars by the orbital period of Venus. In this case, we divide 1.88 years (the orbital period of Mars) by 0.615 years (the orbital period of Venus).

The result of this division is approximately 3.06. This means that Venus completes approximately 3 orbits for every orbit that Mars completes. In other words, as Mars is completing one orbit around the Sun, Venus has already completed about 3 orbits.

This difference in orbital periods is due to the varying distances between the planets and the Sun. Venus orbits closer to the Sun than Mars, which results in a shorter orbital period for Venus compared to Mars.

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Answer:

25

Explanation:

hinli ako sure yan jok mali

Answer:

2 to 4 hours

Explanation:

Given that,

Microbial food infections

We know that,

Food infection :

When we eat old food, uncooked, fermented food, more junk food and contaminated food then 2 to 4 hours after eating we started vomiting, headache then we affected by food infections.

So, we can say that microbial food infections are usually not seen until 2 to 4 hours after eating contaminated food.

The approximate average speed of the molecules in the gas is 410 m/s

mv² = nRT

Divide both side by m

v²= nRT / m

Take the square root of both sides

v = √(nRT / m)

v = √(2 × 8.31 × 323 / 0.032)

v = 410 m/s

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Answer:

Explanation:

The vector ( -A) will be directed south, and its modulus is 3 m

If vector A is 3 m north, then vector -A would be in the south direction and its modulus will be 3 m.

Anything that has both a direction and a magnitude is referred to as a vector. It is often represented by an arrow whose length is proportional to the magnitude of the quantity and whose direction is the same as that of the quantity. A vector does not have position while having magnitude and direction.

Vector quantities include things like movement, acceleration, force, momentum, weight, light speed, gravitational field, current, and more. Zero vector, unit vector, position vector, co-planar vector, equal vector, collinear vector, like vector, and unlike vector, are some types of vectors.

If vector A is 3 m north, then vector -A would be in the south direction and its modulus will be 3 m.

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Answer:

a. Speed = 342.5 meters per seconds.

b. Wavelength = 2.0 meters

Explanation:

Given the following data;

Distance = 100m

Time = 292 milliseconds to seconds = 292/1000 = 0.292 seconds

Frequency = 171 Hz

a. To find the speed of sound in air;

Speed = distance/time

Speed = 100/0.292

Speed = 342.5 m/s

b. To find the wavelength;

Wavelength = speed/frequency

Wavelength = 342.5/171

Wavelength = 2.0 m

Answer:

-2.4 m/s²

Explanation:

avg accel = Δv/Δt

v-i = 30 m/s

v-f = (30 m/s)(0.60) = 18 m/s

Δt = 5.0 sec

avg accel = (18 m/s - 30 m/s) / 5.0 s = (- 12 m/s) / 5 s = -2.4 m/s²

negative sign means it's slowing down

Answer:

First, we need to calculate the new volume of the glycerin at 30°C using the thermal expansion coefficients:

ΔV = V₀ * a * ΔT

where:

- V₀ = initial volume of glycerin at 20°C = 1.8 L

- a = thermal expansion coefficient of copper = 1.7 x 10-³ [2] °C-1

- ΔT = temperature increase = 30°C - 20°C = 10°C

ΔV = 1.8 L * 1.7 x 10-³ [2] °C-1 * 10°C = 0.0306 L

The new volume of glycerin at 30°C is:

V = V₀ + ΔV = 1.8 L + 0.0306 L = 1.8306 L

However, the volume of the kettle is only 1.8 L, so some glycerin will spill out. The amount of glycerin that spills out is equal to the excess volume:

ΔV_spill = V - V₀ = 1.8306 L - 1.8 L = 0.0306 L

Therefore, 0.0306 L of glycerin will spill out when the temperature of the copper kettle rises from 20°C to 30°C.

By using equations for thermal expansion, we can determine the amount of glycerin that will spill from the kettle as it is heated from 20°C to 30°C. The difference in thermal expansion coefficients between glycerin and copper (which the kettle is made from) means the glycerin will spill. Approximately 9.54 milliliters of glycerin will spill out.

This question is about thermal expansion, a concept in physics. When objects are heated, they generally expand, and when they are cooled, they contract. The specifics of the expansion can be determined by coefficients of thermal expansion. In this case, for glycerin, it's denoted as 'y' and for copper as 'a'.

The volume change (∆V) will be given by: ∆V = Vo.y.∆T where Vo is the initial volume, y is the coefficient of thermal expansion and ∆T is the change in temperature.

Here, ∆V = 1.8 L * 5.3 x 10^-4 °C^-¹ * (30°C - 20°C) = 0.00954 liters = 9.54 milliliters of glycerin will spill out. Also remember that the copper kettle will also expand, but as 'a' for the copper is less than 'y' for the glycerin, the overall effect is that the glycerin will spill.

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The ball's maximum height would be lower on Mars compared to Earth, while its flight time would be longer on Mars.

The maximum height reached by a projectile is determined by factors such as initial velocity, launch angle, and the acceleration due to gravity. In this scenario, we assume the same initial velocity for the ball on both Mars and Earth. Since the free-fall acceleration on Mars is about 1/3 that of Earth, gravity is weaker on Mars. The weaker gravitational pull on Mars results in a slower deceleration of the ball as it moves against gravity. As a result, the ball will not reach as high of a maximum height on Mars as it would on Earth. Regarding the flight time, it will be longer on Mars. The ball takes more time to reach its maximum height on Mars due to the weaker gravitational acceleration. Additionally, it also takes more time for the ball to descend back to the ground since gravity has a smaller effect on decelerating the ball on Mars. In summary, when throwing a ball upward with the same velocity on Mars as on Earth, the ball's maximum height will be lower on Mars compared to Earth, and its flight time will be longer on Mars.

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Answer:

The time it takes for the jet to reach landing speed is approximately 0.136 hours which is approximately 489 seconds

The landing speed is approximately 466.365 km/hr

Explanation:

The given parameters are;

The initial cruising speed of the jet = Mach 0.79 = 844 km/hr

The rate of speed reduction in the last 89 km = -2780 km/hr²

The distance it  takes the jet to reduce its speed for landing = 89 km

Given the above information,  we make use of the following equation of motion;

s = u·t - 1/2·a·t²

v² = u² - 2·a·s

Where;

s = The distance over which the acceleration (deceleration) is applied = 89 km

u = The initial velocity = 844 km/hr

t = The time taken for the accelerating/decelerating motion

v = The final velocity (landing speed)

Substituting the values gives;

v² = 844² - 2·(2780)·89 = 217496

v = √217496 = 466.365 km/hr

v ≈ 466.365 km/hr

Therefore, the landing speed, v  ≈ 466.365 km/hr

The time it takes is given by the equation, v = u - a·t

Therefore;

t = (u - v)/a = (844 - 466.365)/2780 ≈ 0.136 hours

The time it takes for the jet to reach landing speed ≈ 0.136 hours

From, s = u·t - 1/2·a·t², we have

89 = 844·t - 1/2 × 2780 × t²

89 = 844·t - 1390 × t²

1390 × t² - 844·t + 89 = 0

Solving with an online application gives;

t = 211/695 + (√(27187/2))/695 = 0.4715 hours or t = 211/695 - (√(27187/2))/695 = 0.136 hours

We note that the second time is for the time it will take the jet to get back to 89 km after reaching a speed of 0

Therefore, the correct time is t = 0.136 hours

The time it takes for the jet to reach landing speed ≈ 0.136 hours

True. Immediately after the switch is closed, current only flows through the capacitor and not through the resistor. This is because the resistor offers resistance to the current flow while the capacitor acts as a short in the circuit.

What is a RC circuit?

Consider the circuit diagram shown below. This circuit is known as an RC circuit. In an RC circuit:

Supposing that the capacitor has been kept uncharged for a long period of time, at this instant when the switch is closed, only the current flows through the capacitor and not through the resistor.

This is because the resistor offers resistance to current flow while the capacitor acts as a short in the circuit.

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When an object is moved closer to the concave mirror, then

a)magnitude of image distance increases.

b)the image height become larger.

In concave mirror, we know that when an object is placed at the focus, its image will formed in enlarged size at infinity, it means height of image is large as compared to height of object. Here the scenario is same when object is placed at the center of curvature, object formed at the center of curvature of mirror in opposite direction of object. When object is moved closer to mirror from the center of curvature, image starts moving away from the mirror.

Image will formed below the positive y-axis and nature of image will be inverted and size of image starts increasing when it moves closer to mirror.

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Using the Hertzsprung-Russell diagram the conditions that describe each star are :

    Description                                                            Stars

Hertzsprung-Russell diagram is scatterplot diagram that shows the various relationships between the intrinsic brightness of the stars plotted against their spectral types.

hence :

It is fusing hydrogen at its core describes Vega

It has lost its outer shell and retained only a hot core that is slowly losing its  brightness describes Procyon B  while

Its temperature has decreased, but it is shining brighter than before describes Polaris

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Answer:

It is fusing hydrogen at its core-Vega

It has lost its outer shell and retained only a hot core that is slowly losing its brightness-Procyon B

Its temperature has decreased, but it is shining brighter than before-Polaris

Explanation:

this is the correct answer for edmentum only

SWOT Analysis Strengths- Paley’s Products has a low overhead cost with the company operating at a high level of efficiency, resulting in competitive pricing.- They have a team of experienced employees who have worked in the industry for several years.- They have a variety of products in the portfolio that can satisfy customers from different sectors.- They are reputable and have a loyal customer base.Weaknesses- They have been slow to adopt new technology, and this may be a disadvantage to the company.- Limited marketing and sales promotion are affecting their sales revenue.-

They depend on a few key customers for the bulk of their sales revenue, leaving them vulnerable to market changes.Opportunities- Expansion of the product line to include unique products.- The establishment of strategic partnerships with other businesses in the industry.- Exploration of new markets, such as international markets.- Improvement of marketing techniques to increase brand awareness.Threats- Changes in consumer preferences towards environmentally friendly products.- Increase in competition from other businesses in the industry.- Fluctuating market prices for raw materials that may lead to price increases.

Strategic Actions to be taken by Paley Products1. Development of an E-commerce platform to allow online transactions with customers. The E-commerce platform will enable Paley to reach a wider customer base, expand its reach, and increase sales revenue.2. Investment in the research and development of new environmentally friendly products. Paley will remain competitive and cater to the needs of consumers who prefer green products.3. Establishment of strategic partnerships with other businesses in the industry to leverage the strength of other companies in the industry and to develop new products or increase market share.4. Improvement of marketing techniques to increase brand awareness and improve visibility. A marketing strategy that incorporates social media and other digital channels can help promote the brand to potential customers.5. Expansion into international markets. This will enable Paley to diversify its customer base and generate more revenue. Paley can start by targeting nearby countries, then expand globally as they gain more experience and financial stability.

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The magnitude of the force experienced by the wire is 1 N.

The magnitude of the force experienced by a current-carrying wire in a magnetic field can be calculated using the formula:

F = |I * B * L|

where:

F is the magnitude of the force,

I is the current in the wire,

B is the magnetic field strength, and

L is the length of the wire.

In this case, the current (I) is 2 A, the magnetic field (B) is 0.5 T, and the length (L) of the wire is 10 cm or 0.1 m.

Plugging in the values into the formula, we have:

F = |2 A * 0.5 T * 0.1 m|

F = |1 N|

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The total force of the atmosphere on a 6x8 inch rubber square at sea level is approximately 14.7 pounds, due to atmospheric pressure.

The total force of the atmosphere on a 6x8 inch rubber square at sea level is due to atmospheric pressure, which is caused by the weight of the air above it. The standard atmospheric pressure at sea level is 14.7 pounds per square inch (psi).

So, the total force on the rubber square would be 6 x 8 x 14.7 = 705.6 pounds. It's important to note that atmospheric pressure can vary depending on altitude, temperature, and other factors, but at sea level it is commonly taken to be 14.7 psi.

Additionally, the smooth and thin nature of the rubber square means that it will be affected very little by surface tension or other forces, so the pressure alone will be the dominant force acting on it.

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1) Determine the mass of the expelled CO2, 2) Calculate the acceleration of the CO2 using Newton's second law, and 3) Multiply the mass by the acceleration to obtain the force exerted by the CO2 on the system.

Newton's second law states that the force exerted on an object is equal to the mass of the object multiplied by its acceleration. To apply this principle to predict the force exerted by expelled CO2 on a system, the following steps can be followed:

Determine the mass of the expelled CO2: This can be achieved by measuring the mass of the CO2 or using known properties such as the molar mass of CO2 and the quantity of CO2 expelled.

Calculate the acceleration of the CO2: The acceleration can be determined by considering the forces acting on the CO2. In this case, the main force acting on the CO2 would be the expulsion force. Other factors such as air resistance can be taken into account if necessary.

Multiply the mass by the acceleration: Once the mass and acceleration are determined, multiply them together to obtain the force exerted by the CO2 on the system. The unit of force is typically Newtons (N).

By following this method and applying Newton's second law, it is possible to predict the force exerted by the expelled CO2 on the system. It is important to ensure accurate measurements and consider all relevant forces to obtain a reliable prediction.

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Answer:

A. The range of A and B are equal.

Explanation:

Let u be the initial speed of both the projectile.

The gravitational force acting in the projectile is in the downward direction, sp the speed of the projectile in the horizontal direction remains constant and equals to the initial horizontal speed.

For projectile, a projectile having initial velocity u at an angle \theta with the horizontal direction,

The speed in the horizontal direction \(= u\cos\theta\)

and the speed in the vertical direction is \(= u\sin\theta\) upward.

For A:

The speed in the horizontal direction \(= u\cos75^{\circ}\)

and the speed in the vertical direction is \(= u\sin75^{\circ}\) upward.

For B:

The speed in the horizontal direction \(= u\cos15^{\circ}\)

and the speed in the vertical direction is \(= u\sin15^{\circ}\) upward.

Let \(t_A\) and \(t_B\) are the time of flight for projectile A and B respectively.

As the range is the horizontal distance traveled by the projectile, so

The range for the projectile A \(= u\cos75^{\circ}\times t_A\cdots(i)\)

The range for the projectile B = \(u\cos15^{\circ}\times t_B\cdots(ii)\)

At the highest point, the vertical velocity is 0.

Bu using the equation of motion \(v^2=u^2 +2a s.\)

Here, the final velocity v=0, the initial velocity \(u = u \sin \theta\) , h= vertical distance up to the highest point, and \(a= -g\) (as per sign convention).

So, \(s= \frac{u^2\sin^2 \theta}{2g}\)

For projectile A: The maximum height attained.

\(s_A= \frac{u^2\sin^2 75^{\circ}}{2g}\)

For projectile B: The maximum height attained.

\(s_B= \frac{u^2\sin^2 15^{\circ}}{2g}\)

As \(\sin^2 75^{\circ} > \sin^2 15^{\circ}\), the height of A is attained by A is more than the heigHt attained by B.

Now, the times required to reach the highest point from the ground and again form the highest point to the ground are the same.

So, the total time of flight = 2 x (Time to reach the highest point)

In a similar way, by using the equation of motion v=u+at,

The time to reach the highest point \(=\frac {u\sin\theta}{g}\)

where g is the acceleration due to gravity.

So, the total time of flight

\(= 2 \times \frac {u\sin\theta}{g}\)

The total time of flight for A

\(=2 \times \frac {u\sin75^{\circ}}{g}\)

The total time of flight for A

\(=2 \times \frac {u\sin15^{\circ}}{g}\)

Now, from equations (i) and (ii),

The range for the projectile A =

\(u\cos75^{\circ}\times \frac {2u\sin75^{\circ}}{g}=\frac {u^2 \sin 150^{\circ}}{g}= \frac {u^2 \sin 30^{\circ}}{g}\)

The range for the projectile B =

\(u\cos15^{\circ}\times \frac {2u\sin15^{\circ}}{g}=\frac {u^2 \sin 30^{\circ}}{g}.\)

Both the projectile have the same range.

Hence, option (A) is correct.

A watt is equivalent to an amp multiplied by a volt. All done! Therefore, watt = amp X volt. This equation is also sometimes written as W=A X V.

The power unit is the watt. It refers to the quantity of energy required for a given object to operate as well as the rate during which energy is used up. A joule of energy (or one watt) is equal to one joule of electricity flowing for one second.

Watts, which are determined by multiplying Amps by Volts, are used to measure energy. As the wattage rises, the appliance produces more power and output. This is the amount of water that the hosepipe example would emit.

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1) Note that the Roof is dark colored. Given the laws of physics, it will absorb all light.

2) the window is transparent, hence, it will transmit ALL light.

3) the door is dark-colored but has some glass on it. Thus, it will absorb MOST but not all light.

4) the side of the building which is painted white will reflect all light.

Note that dark surfaces absorb light because they are able to absorb photons, or particles of light, and convert them into other forms of energy.

This is because the atoms and molecules in dark surfaces have a large number of unpaired electrons that are able to absorb the energy of photons and transition to a higher energy state.

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Answer:

A

Explanation:

Because of the convectional currents

Answer:

I believe the answer is b

Explanation:

Braking studies have shown that a tractor-trailer traveling at 55 mph needs two times the distance to stop as an automobile.

There are four parts that make up a vehicle's overall stopping distance i.e., Vehicle reaction time and distance, human perception time and distance, human reaction time and distance Vehicle Braking Distance and Time

The maximum distance your car will travel while braking under perfect circumstances. It may require 216 feet at 55 mph on dry pavement with decent brakes. The brakes must use more force to stop a bigger car, which increases heat absorption. On the other hand, large vehicles' brakes, tires, springs, and shock absorbers are made to function optimally when fully loaded. Trucks that are empty need longer stopping distances because they have less traction. It can lock up and bounce, providing substantially worse braking.

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Early morning clouds will change to partly cloudy sky later in the day temperature . High 52F. SW winds 10 to 20 mph.

Except for the Mediterranean region, where pleasant winters and scorching summers are more common, France typically experiences moderate winters and mild summers. The usual winter ranges from 32 to 46 degrees Fahrenheit, while the typical summer ranges from 61 to 75 degrees.

Maximum daily temperatures in July ranged from 20°C to 43°C (68°F to 109°F). The range of daily lows in July is 45°F to 66°F (7°C to 19°C).

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