Escriba la cantidad que representan los siguientes expresiones, dada en
notación cientifica.
a) 7.1 x 10
6) 2.3 x 103
C) 1.56 10
d) 4. 19. 4. 104

Collected data plays a crucial role in evaluating whether the criteria for success have been met. By analyzing the collected data, one can assess the progress made towards achieving the desired goals and determine if the criteria have been fulfilled.

Data provides an objective measure of performance or outcomes, allowing for an evidence-based assessment of success. It helps to quantify and track key metrics or indicators related to the criteria for success. By comparing the actual data with the predetermined benchmarks or targets, one can determine if the criteria have been met or if further improvements are required.

Data analysis also enables the identification of trends, patterns, and correlations, providing insights into the factors influencing success. It helps in identifying areas of strength and areas that need improvement. Additionally, data can be used for comparative analysis, benchmarking against previous periods or similar projects, to gain a broader perspective on success.

In summary, collected data provides an objective basis for evaluating progress and success by comparing actual performance against predetermined criteria, identifying areas of improvement, and gaining insights for future decision-making.

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The magnitude of both the gravitational force (Fg) and the electric force (Fe) between the electron and proton in a hydrogen atom, you can use Coulomb's Law for electric force and Newton's Law of Universal Gravitation for gravitational force.

The First, find the electric force (Fe) using Coulomb's Law Fe = Kc * |qe1 * qe2| / r^2 Fe = (8.99x10^9 N m^2/C^2) * |-1.60x10^-19 C * 1.60x10^-19 C| / (5.3x10^-11 m) ^2 Fe = (8.99x10^9) * (2.56x10^-38) / (2.809x10^-21) Fe ≈ 8.22x10^-9 N
Next, find the gravitational force (Fg) using Newton's Law of Universal Gravitation Fg = G * (me * mp) / r^2
Fg = (6.673x10^-11 N m^2/kg^2) * (9.109x10^-31 kg * 1.673x10^-27 kg) / (5.3x10^-11 m) ^2 Fg = (6.673x10^-11) * (1.524x10^-57) / (2.809x10^-21) Fg ≈ 3.62x10^-47 N So, the electric force (Fe) between the electron and proton in a hydrogen atom is approximately 8.22x10^-9 N, and the gravitational force (Fg) is approximately 3.62x10^-47 N.

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To calculate the expected voltage across the capacitor and resistor, we need to use the peak-to-peak voltage of 4V and the frequency of 1000 Hz. The peak-to-peak voltage represents the difference between the maximum and minimum voltage levels in a waveform.

First, convert the peak-to-peak voltage to RMS voltage by dividing by the square root of 2:
Vrms = Vpp / √2 = 4V / √2 ≈ 2.83V
Next, we need to know the capacitance of the capacitor (C) and the resistance of the resistor (R) to determine the impedance of each component at 1000 Hz. Since these values are not provided, we will represent them as C and R.
Calculate the capacitive reactance (Xc) using the formula: Xc = 1 / (2π * f * C)
Calculate the impedance (Z) of the RC circuit using the formula: Z = √(R^2 + Xc^2)
Finally, use Ohm's Law to find the voltage across the capacitor (Vc) and resistor (Vr): Vc = Vrms * (Xc / Z)
Vr = Vrms * (R / Z)
In summary, to find the expected voltage across the capacitor and resistor, you need to convert the given peak-to-peak voltage to RMS voltage, calculate the capacitive reactance and impedance, and apply Ohm's Law. Since the values of C and R are not provided, the final answer is represented in terms of these variables.

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The momentum of the combined object after the collision has a magnitude of 7mv.

Before the collision, the momentum of the first object (mass m, velocity 3v towards the east) can be calculated as p1 = mv, and the momentum of the second object (mass 2m, velocity 2v towards the north) can be calculated as p2 = 2mv.

Since the collision is completely inelastic, the two objects will stick together and move as one combined object after the collision.

Using the law of conservation of momentum, we can say that the total momentum before the collision (p1 + p2) must be equal to the total momentum after the collision (p').

Therefore, p1 + p2 = p'

Substituting the values we have for p1 and p2, we get:

mv + 2mv = p'

3mv = p'

So the momentum of the combined object after the collision has a magnitude of 3mv towards the east and 2mv towards the north. We can use the Pythagorean theorem to find the magnitude of the momentum:

p' = √[(3mv)² + (2mv)²]

p' = √[9m²v² + 4m²v²]

p' = √[13m²v²]

p' = 7mv

The momentum of the combined object after the completely inelastic collision between the two objects (mass m and velocity 3v towards the east, and mass 2m and velocity 2v towards the north) has a magnitude of 7mv.

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Wall pulls on the ladder with a 220 N force. A man who weighs 110 kg is standing halfway up a ladder that is 4.0 metres long. The ladder is incredibly light, and its base is 1.5 metres away from the wall.

A force in physics is an effect that has the power to alter an object's motion. A force can cause an object with mass to change its velocity, or accelerate (for example, moving from a condition of rest). Intuitively, a push or a pull can also be used to describe force. A body's mass is a fundamental characteristic.

Force*(1.5/2) equals N*sqrt[4-1.5/2].

110*9.81 * 0.75 = N * 3.708

N = 220 N

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Answer:

Option (b).

Explanation:

Mass of an object is defined as the amount of matter contained in it. In this case, the mass of helium gas in a balloon is the amount of matter inside the balloon. It is independent of the outside condition.

Hence, out of 4 options, the correct option is (b).

Answer:

b

Explanation:

The lowest frequency heard by the listener is 578.4 Hz and the highest frequency heard is 620.4 Hz. These frequencies are due to the Doppler effect caused by the movement of the whistle in a circle.

We can start by finding the velocity of the whistle as it moves in a circle. This can be found using the formula v = rω, where v is the velocity, r is the radius, and ω is the angular speed. Plugging in the given values, we get:

v = (0.769 m)(16.2 rad/s) = 12.448 m/s

Now, let's think about the sound waves that the whistle is producing. As the whistle moves in a circle, it is constantly emitting sound waves in all directions. However, some of these waves are compressed (higher frequency) and some are stretched out (lower frequency) depending on the direction of their motion relative to the listener.

To find the highest and lowest frequencies heard by a listener at rest with respect to the center of the circle, we need to consider the Doppler effect. This is the phenomenon where the frequency of a sound wave appears to change for an observer if the source of the sound is moving relative to the observer.

The formula for the Doppler effect is:

f' = f (v + v_obs) / (v + v_source)

where f is the frequency of the sound wave, f' is the perceived frequency, v is the velocity of the sound wave (which is the speed of sound in air, given as 343 m/s), v_obs is the velocity of the observer (which is 0 since they are at rest), and v_source is the velocity of the source (which is the velocity of the whistle, found earlier as 12.448 m/s).


(a) The lowest frequency heard will occur when the whistle is moving directly away from the listener. In this case, the sound waves will be stretched out (lower frequency) due to the Doppler effect. The velocity of the sound wave relative to the listener is v - v_obs = 343 m/s. The velocity of the source relative to the listener is v_source - v_obs = 12.448 m/s. Plugging these values into the Doppler formula, we get:

f' = f (v + v_obs) / (v + v_source)
f' = 587 Hz (343 m/s) / (343 m/s + 12.448 m/s)
f' = 578.4 Hz

So the lowest frequency heard by the listener is 578.4 Hz.

(b) The highest frequency heard will occur when the whistle is moving directly towards the listener. In this case, the sound waves will be compressed (higher frequency) due to the Doppler effect. The velocity of the sound wave relative to the listener is v + v_obs = 343 m/s. The velocity of the source relative to the listener is v_source + v_obs = 12.448 m/s. Plugging these values into the Doppler formula, we get:

f' = f (v + v_obs) / (v + v_source)
f' = 587 Hz (343 m/s + 0 m/s) / (343 m/s - 12.448 m/s)
f' = 620.4 Hz

So the highest frequency heard by the listener is 620.4 Hz.

Lowest frequency heard by the listener is 578.4 Hz and the highest frequency heard is 620.4 Hz. These frequencies are due to the Doppler effect caused by the movement of the whistle in a circle.

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The average speed of the car is 35.6m/s

The average speed is the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity. It is represented by the magnitude and does not have direction. It is measured in meter per second

Therefore average speed = total distance / total time taken

The total distance here is 500+ 500= 1000km = 1×10⁶m

the time taken for the first journey = 500×1000/35= 14285.71 seconds

the time taken for traveling back = 500000/43= 11627.91 seconds

total time taken = 14285.71 + 11627.91 = 25913.62seconds

therefore average speed = 1000000/25913.62

= 35.6m/s

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If the Earth did not rotate but kept one hemisphere constantly facing the Sun during its yearly orbit, the celestial poles and equator would be defined differently. The celestial poles would align with the points where the Earth's axis of rotation intersects the celestial sphere, while the celestial equator would be a projection of the Earth's equator onto the celestial sphere.

The Earth's rotation is what causes the celestial poles and equator to be defined in relation to its axis of rotation. In the scenario where the Earth does not rotate but keeps one hemisphere constantly facing the Sun, the concept of the celestial poles and equator would still exist, but their definition would change.

The celestial poles would align with the points where the Earth's axis of rotation intersects the celestial sphere, which would be fixed in relation to the Sun. The celestial equator, on the other hand, would be a projection of the Earth's equator onto the celestial sphere.

The positions of celestial objects, such as stars, would appear to move in relation to these fixed celestial reference points.

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Answer:

it way the most on jupiter and the least on mars

Explanation:

Answer:

The definition of the particular circumstance consists provided in the subsection on the interpretation elsewhere here.

Explanation:

The temperature rise the second cylinder B is 5/3 times the temperature in the cylinder A.

The heat source for both cylinders was:

ΔQ₁ = ΔQ₂  .....eq 1

Gas will expand in a cylinder with a free piston so that the pressure is always constant.

P = constant

Then,

ΔQ₁ = n.Cp.ΔT

ΔQ₁ = n.Cp.T₀  .....eq 2

With Fixed piston for cylinder (constant volume process),

V = constant

ΔQ₁ = n.Cv.ΔT  .....eq 3

From eq 1

n.Cp.T₀  =  n.Cv.ΔT

ΔT = (Cp/Cv) . T₀

ΔT = γ T₀

For the monatomic gas (γ = 5/3)

ΔT = 5/3 T₀

Thus, the temperature rise the second cylinder B is 5/3 times the temperature in the cylinder A.

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The percentage difference between Kₒw and Cᵢcw for the first two parts of the laboratory falls within acceptable ranges. The difference is 0.59 or less, which is excellent.

In the first two parts of the laboratory, the percentage difference between Kₒw (known forces balanced) and Cᵢcw is calculated.

A difference of 0.59 or less is considered excellent, indicating a high level of accuracy and precision in the measurements. This suggests that the experimental values closely match the expected values.

By meeting the criteria, it can be concluded that the experimental results for the first two parts of the laboratory are reliable and consistent.

The small percentage differences indicate that the measurements are within the acceptable range of uncertainty, providing confidence in the experimental procedure and data analysis.

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Complete question here:

Consider the percentage difference between the _ Kow and the C icw for the first two parts of the laboratory when known forces are balanced. A difference of 0.59 or less is excellent; difference of 1.0% or less is good, and difference of 2% or less is acceptable. Based on these criteria, describe your results for the first two parts of the laboratory and defend your statement Using the same criteria as in Question for the percentage differences_ describe your results for the determination of mass of the meter stick in Part 3 of the laboratory and fr the determination of the lever arm of the mass M4 in Part of the laboratory

Answer:

Yes the correct answer is B

Explanation:

Answer:

15 grams

Explanation:

9 sugar cubes + 2 teaspoons of baking soda + 2 grams of the sugar cubes each + 3 grams of baking soda = 15g.

The total mass of the reactants used is 24 grams.

A reactant is a substance that undergoes a chemical change or reaction with another substance in a chemical reaction. It is one of the starting materials that are transformed or converted into one or more new substances called products. Reactants are typically written on the left-hand side of a chemical equation, while the products are written on the right-hand side.

In some cases, reactants may be in different phases or states of matter, such as a solid, liquid, gas, or aqueous solution. The identification and measurement of the reactants involved in a chemical reaction are important in understanding the underlying chemistry and predicting the outcomes of the reaction.

Here In the  Question,

The total mass of sugar cubes used is:

9 sugar cubes x 2 grams/sugar cube = 18 grams

The total mass of baking soda used is:

2 teaspoons x 3 grams/teaspoon = 6 grams

So, the total mass of the reactants (sugar cubes and baking soda) used in the experiment is:

18 grams + 6 grams = 24 grams.

Therefore, 24 grams are utilized as the total mass of the reactants.

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Answer:

It will accelerate at a constant rate.

Explanation:

If the driving force is constant, with a constant reduction in weight, the truck will accelerate at a constant rate.

the acceleration of the truck increase if sand leaks at a constant rate from a hole in the truck bed.

Force(F) applied on the body is mass(m) times its acceleration(a). i.e. F=ma according to this equation we get acceleration as a = F/m this equation says that when we apply more force to the body, more acceleration it gets. When more is the mass of the body, greater force is needed to accelerate with same amount to that less mass.

According to the relation, a = F/m

mass produces inertia in the body, means mass is a resistance to the linear motion. if mass is greater acceleration is less and mass is more the acceleration is more.

if mass  sand leaks at a constant rate from a hole in the truck bed, mass of the truck decreases which increases the acceleration.

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The temperature is an example of an interval scale of measurement. Temperature is a quantitative variable that can be measured on a scale, such as Fahrenheit or Celsius.

In an interval scale, the numbers assigned to the measurements have a meaningful order, and the intervals between them are equal. However, the zero point on the scale is arbitrary, meaning it does not represent the absence of the measured attribute. In the case of temperature, zero does not indicate the complete absence of heat; it is simply a reference point.

The interval scale of temperature allows for meaningful comparisons and calculations involving temperature differences. For example, the difference between 10°C and 20°C is the same as the difference between 30°C and 40°C. However, it is not meaningful to say that 40°C is "twice as hot" as 20°C because the zero point is arbitrary. This characteristic distinguishes temperature from a ratio scale, where ratios and proportions can be accurately measured. Therefore, temperature is classified as an interval scale of measurement.

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Proper positioning of the welder is essential for safe and effective hand cutting. Here's a description of the correct positioning technique.

When hand cutting, the welder should follow these positioning guidelines:

Stance: Stand with a stable and balanced stance, keeping feet shoulder-width apart. Distribute weight evenly to ensure stability during the cutting process.

Body Position: Position your body perpendicular to the workpiece, facing the direction of the cut. Maintain a comfortable and relaxed posture to minimize fatigue.

Hand Placement: Hold the cutting torch with both hands, gripping it firmly but not excessively tight. Place the non-dominant hand near the base of the torch handle for support and control. The dominant hand should be positioned near the cutting trigger.

Arm Alignment: Keep your arms slightly bent to maintain flexibility and control. Align the torch in a straight line with the cut, ensuring that the torch remains perpendicular to the workpiece.

Torch Angle: Hold the cutting torch at a 90-degree angle to the workpiece's surface. This angle allows for optimal gas flow and efficient cutting.

Distance: Maintain a consistent distance between the tip of the cutting torch and the workpiece. The recommended distance is typically around 1/8 to 1/4 inch, depending on the material being cut.

Travel Speed: Move the torch steadily and smoothly along the desired cutting path. Avoid moving too fast or too slow, as it can affect the quality of the cut.

Personal Protective Equipment (PPE): Always wear appropriate PPE, including a welding helmet with a shade suitable for cutting, safety glasses, flame-resistant clothing, gloves, and boots.

Remember, proper training and experience are crucial for safe and effective hand cutting. Always follow the manufacturer's instructions and recommended practices for your specific cutting equipment.

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Answer:

88 %

Explanation:

The rate of heat loss by a conducting material of thermal conductivity K, cross-sectional area,A and thickness d with a temperature gradient ΔT is given by

P = KAΔT/d

The total heat lost by the styrofoam wall is P₁ = K₁A₁ΔT₁/d₁ where K₁ =thermal conductivity of styrofoam wall 0.033 W/m-K, A₁ = area of styrofoam wall = 17 m², ΔT₁ = temperature gradient between inside and outside of the wall and d₁ = thickness of styrofoam wall = 0.20 m

The total heat lost by the glass window is P₂ = K₂A₂ΔT₂/d₂ where K₂ =thermal conductivity of glass window pane wall 0.96 W/m-K, A₂ = area of glass window pane = 0.15 m², ΔT₂ = temperature gradient between inside and outside of the window and d₂ = thickness of glass window pane = 7 mm = 0.007 m

The total heat lost is P = P₁ + P₂ = K₁A₁ΔT₁/d₁ + K₂A₂ΔT₂/d₂

Now, since the temperatures of both inside and outside of both window and wall are the same, ΔT₁ = ΔT₂ = ΔT

So, P = K₁A₁ΔT/d₁ + K₂A₂ΔT/d₂

Since P₂ = K₂A₂ΔT₂/d₂ = K₂A₂ΔT/d₂is the heat lost by the window, the fraction of the heat lost by the window from the total heat lost is

P₂/P = K₂A₂ΔT/d₂ ÷ (K₁A₁ΔT/d₁ + K₂A₂ΔT/d₂)

= 1/(K₁A₁ΔT/d₁÷K₂A₂ΔT/d₂ + 1)

= 1/(K₁A₁d₂÷K₂A₂d₁ + 1)

= 1/[(0.033 W/m-K × 17 m² × 0.007 m ÷ 0.96 W/m-K × 0.15 m² × 0.20 m) + 1]

= 1/(0.003927/0.0288 + 1)

= 1/(0.1364 + 1)

= 1/1.1364

= 0.88.

The percentage is thus P₂/P × 100 % = 0.88 × 100 % = 88 %

The percentage of heat lost by window of the total heat is 88 %

Answer:

Plants and animals that live in a biome must be able to live and reproduce in the conditions

Explanation:

Answer:

101201.2 Pascal.

Explanation:

Given that the difference h between the two liquid levels is 2.0 cm. The density of the liquid is 800 kg /m3.

Calculate the difference between the pressure of the gas and atmospheric

pressure.

The pressure of the gas can be calculated by using the formula

Pressure = density × acceleration due to gravity × height

Substitute all the parameters into the formula

Pressure = 800 × 2/100 × 9.8

Note that the height is converted to metre.

Pressure = 156.8 Pascal

pressure difference = 101358 - 156.8

Pressure difference = 101201.2 Pascal

Answer:

(c) 70N is the correct answer for this question

Answer:

Displacement time graph for uniform motion is a straight line with non-zero slope. Displacement time graph for uniform acceleration is a parabola.

The question is fishing for "balanced force".

But the description in the question is terrible.

True, Venus is at its greatest distance from Earth during its full phase, it cannot be seen since it is hidden by the Sun.

A planet is a celestial body that meets the following criteria: (a) it orbits the Sun; (b) it has enough mass for its self-gravity to outweigh rigid body forces, assuming a hydrostatic equilibrium shape that is roughly circular; and (c) it has cleared the area in and around its orbit.

These planets resemble stars to the unaided eye. The planets did, however, shift in relation to the stars. They were given the name "wandering stars" as a result. The Greek word planets, which means "wanderer," is where our term "planet" originates.

The planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, listed in order of their distance from the Sun.

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A lake freezes from the top down because ice is less dense than liquid water.

Water is an exceptional substance because it expands when it freezes. As a result, the density of ice is lower than that of liquid water. As the temperature drops, the surface water begins to cool down and eventually freezes.

When the water freezes, it expands and becomes less dense. Therefore, the ice floats on top of the water, and the water below the ice stays liquid.

This process continues until the whole lake is frozen. If water were to freeze from the bottom up, the ice would sink to the bottom, and the process would continue until the entire body of water became ice, which would have catastrophic consequences for aquatic life.

However, because of the unique properties of water, lakes and other bodies of water freeze from the top down, allowing life in the water to survive beneath the ice.

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The given statement, "When a car goes around a curve of smaller and smaller radius, the centripetal force on it decreases." is false.

The centripetal force required to keep a car moving in a curved path at a constant speed is directly proportional to the square of its velocity and inversely proportional to the radius of the curve.

As the radius of the curve decreases, the required centripetal force increases, not decreases. If the centripetal force on the car decreases, it would move out of its circular path, implying a decrease in velocity or radius of curvature.

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With 4.3 m/s velocity, is the cheetah running.

velocity= distance/time

distance=27.6 m

time=6.3 s

velocity=27.6 m/6.3 s

velocity=4.3 m/s

A vector number known as velocity describes "the pace at which an item changes its location." Imagine a person moving quickly, taking one stride ahead, one step back, and then beginning from the same place each time. A vector quantity is velocity. As a result, velocity is aware of direction. One must consider direction while calculating an object's velocity. Saying that an item has a velocity of 55 miles per hour is insufficient. The direction must be included in order to adequately characterize the object's velocity. Simply said, the velocity vector's direction corresponds to the motion of an item.

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Answer:

A solar eclipse results when the moon passes in between the earth and the sun hiding the sun fully or partly for some time. A lunar eclipse occurs when the earth passes in between the moon and the sun casting its shadow on the moon and thus hiding it fully or partly for some time.

Explanation:

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