A nursing student studying public health has asked the instructor where to find good sources of evidence-based practice that could help provide the basis for policy changes as part of a thesis project. Which resource would be most helpful for the student

The average velocity will be more useful if you wanted to know how long it would take you to get to a store and come back.

The overall distance the object covers in a given amount of time is its average speed. The scalar quantity represents the average speed. It does not have direction; it is represented by magnitude.

Average Speed=\(\frac{total distance}{total time}\)

Average velocity is a vector quantity. The change in position or displacement divided by the time periods during which the displacement happens is known as average velocity. Depending on how the displacement is displaced, the average velocity may be positive or negative. Meters per second (m/s), the SI unit of average velocity, is used.

Average Velocity=\(\frac{Total displacement}{Total time}\)

So, in average speed no particular direction is given there can be multiple ways to go to the store and come back so average speed can be different every time.

But in case of average velocity there must be particular shortest route that is known as displacement and that would give an accurate time to go to the store and come back

Hence, average velocity is more useful as compared to average speed.

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Answer:

The main idea is hoemany thing can turn into amazing and great things

Explanation:

Answer:

The main idea for this passage us to tell you about and space ship and how fast it can go and about the physics

Answer:

This example of the effect of volume on the pressure of a given amount of a confined gas is true in general. Decreasing the volume of a contained gas will increase its pressure, and increasing its volume will decrease its pressure.

Explanation:

Hope it helps

Answer:

Sun, fireflies, glow worms ,Stars ,a lighter torch ,a kerosene Oil Lamp, burning candle, vapor light, a bulb

Answer:

Sun

Flame in an oil lamp

tube light

bulb

fireflies

lighted candle

LEDs

laser

jellyfish

Fire

Explanation:

luminous objects are objects that produce light and are responsible for vision.

The maximum frequency affected by the blackout is approximately 7.943 MHz, and the location of the blackout is Laurel, Maryland, which is located at approximately 39.09°N, 76.85°W.

HF radio blackouts are a phenomenon that impacts High Frequency (HF) radio waves by causing them to become inaudible or distorted. The severity of an HF radio blackout is determined by a number of factors, including the frequency of the radio waves, the time of day, and the solar zenith angle.

Let us calculate the maximum frequency affected by the blackout: According to the model, the frequency of the radio wave is inversely proportional to the power of 1.24. So we can write:f∝(P)-1.24, Where f is the frequency of the radio wave, and P is the power of the blackout. So if a blackout occurs at 15 MHz, then we can find the power of the blackout:P=15^(1.24)P=26.98

So the power of the blackout is approximately 26.98.Next, we need to calculate the maximum frequency affected by the blackout. We can do this by using the formula: f∝(P)-1.24, where f is the frequency of the radio wave, and P is the power of the blackout. So if the power of the blackout is 26.98, then we can find the frequency of the radio wave:f=26.98^(-1/1.24)f=7.943MHz

So the maximum frequency affected by the blackout is approximately 7.943 MHz. Now let us find the location of the blackout: According to the question, the blackout occurred at 10 AM Eastern Daylight Time over Laurel, Maryland on September 10th. So the location of the blackout is Laurel, Maryland, which is located at approximately 39.09°N, 76.85°W.

Therefore, the maximum frequency affected by the blackout is approximately 7.943 MHz, and the location of the blackout is Laurel, Maryland, which is located at approximately 39.09°N, 76.85°W.

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The particle size distribution curve shows a decreasing trend with increasing particle size. The uniformity coefficient is 3.09, indicating that the soil has a wide range of particle sizes. The coefficient of curvature is 0.86, indicating that the soil is poorly graded.

The particle size distribution curve is a graph showing the percentage of soil retained on each sieve plotted against the logarithm of the particle size. The curve shows a decreasing trend with increasing particle size, indicating that the soil contains a range of particle sizes.

The uniformity coefficient is calculated by dividing the size of the sieve opening that passes 60% of the soil by the size of the sieve opening that passes 10% of the soil. In this case, the uniformity coefficient is 3.09, indicating that the soil has a wide range of particle sizes.

The coefficient of curvature is calculated as the ratio of the difference between the log of the size of the sieve opening that passes 60% of the soil and the log of the size of the sieve opening that passes 10% of the soil, divided by the difference between the log of the size of the sieve opening that passes 90% of the soil and the log of the size of the sieve opening that passes 10% of the soil. In this case, the coefficient of curvature is 0.86, indicating that the soil is poorly graded.

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If the electric field is 108 n/c at a distance of 59 cm from a point charge q,  the charge on the point charge is 9.98 x \(10^{-19}\) Coulombs.

We can use the equation for the electric field produced by a point charge to find the charge:

E = k * q / \(r^{2}\)

where,

E = the electric field, equal to 108 N/C

k = the Coulomb constant, equal to 8.99 x \(10^{9}\) N \(m^{2}\) / \(C^{2}\)

q = the charge

r = the distance from the point charge, equal to 59 cm = 0.59 m

Rearranging the equation to solve for q, we get:

q = E * \(r^{2}\) / k

Plugging in the values, we get:

q = 108 N/C * \((0.59 m)^{2}\) / 8.99 x \(10^{9}\) N \(m^{2}\) / \(C^{2}\) )

q = 9.98 x \(10^{-19}\) C

So the charge on the point charge is 9.98 x \(10^{-19}\) C, or 9.98 x \(10^{-19}\) Coulombs.

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Answer:

speed is the rate of change in distance thus it is scalar physical quantity

while velocity is the rate of change in displacement thus it is a vector physical quantity

Explanation:

vector physical quantity: is a quantity that requires both magnitude and direction to identify

scalar quantity: requires only magnitude to identify.

The mass of the given will be 20kg.

By using formula,

force = mass x acceleration

mass = force / acceleration

mass = 400 N / 20m/s²

mass = 20 Kg

Acceleration is the rate at which an object's velocity with respect to time changes. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration.

Any process where the velocity changes is referred to as acceleration. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because the velocity is both a speed and a direction.

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Answer:

the wavelength is 9.8 meters

Explanation:

We can use the relationship:

Velocity = wavelenght*frequency.

Initially we have:

wavelenght = 4.9m

velocity = 9.8m/s

then:

9.8m/s =  4.9m*f

f = 9.8m/s/4.9m =  2*1/s

now, if the velocity is doubled and the frequency remains the same, we have:

2*9.8m/s = wavelenght*2*1/s

wavelenght = (2*9.8m/s)*(1/2)s = 9.8 m

Answer:

9.8

Explanation:

Answer:

4.9

Explanation:

yan po ang sagot thank 7

sna nakatulong divide molng sya para makuha mo yung sagot.

thank u ulit mars /pre

The friction force acting on the firefighter sliding down a vertical pole is approximately 222.6 N.

To find the friction force, we need to analyze the forces acting on the firefighter. In this case, the firefighter is sliding down a vertical pole, so the gravitational force (mg) is acting downward. Additionally, there is a friction force (f) acting in the upward direction opposing the motion.

According to Newton's second law, the net force acting on an object is equal to the product of its mass and acceleration. In this case, the net force is the difference between the gravitational force and the friction force:

Net force = mg - f

Given:

Mass of firefighter (m) = 78 kg

Acceleration (a) = 3.0 m/s²

We can rearrange the equation to solve for the friction force:

f = mg - ma

Substituting the given values, we have:

f = (78 kg)(9.8 m/s²) - (78 kg)(3.0 m/s²)

Calculating the expression, we find that the friction force is approximately 222.6 N.

Therefore, the friction force acting on the firefighter sliding down the vertical pole is approximately 222.6 N. It opposes the motion and helps control the acceleration of the firefighter.

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A 2 kg cue ball is moving at a velocity of 2 m/s when it collides with another 3 kg billiard ball at rest. The total momentum is 4 kg m/ s.

Elaborating the problem:

Before the collision, the momentum of the 2 kg cue ball is:

p₁ = m₁ × v₁

p₁ = 4 kg m/s

The 3 kg billiard ball is at rest, so its momentum is: p₂ = 0 kg m/s

The total momentum of the system before the collision is:

p_total = p₁ + p₂

p_total = 4 kg m/s

The total momentum of the system after the collision is:

p_total = M × \(V_{f}\)

p_total = p₁ + p₂

M × \(V_{f}\) = p₁ + p₂

5 kg × \(V_{f}\) = 4 kg m/s + 0 kg m/s

5 kg * \(V_{f}\) = 4 kg m/s

Therefore, \(V_{f}\) = 0.8 m/s

So, the total momentum of the system is:

p_total = M × \(V_{f}\)

p_total = 5 kg  × 0.8 m/s

p_total = 4 kg m/s

A system's total momentum is the sum of the momentum of all its components. To put it another way, it is the total amount of motion experienced by the system's objects. The total momentum of an isolated system remains constant when there are no external forces acting on it, as stated by the law of conservation of momentum.

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Answer:

There are 4 types of motion

Rotary

Oscillating

Linear

Reciprocating

All of these move slighty in different ways but are similar to eachother.

Explanation:

ANSWER:

A. Open system

STEP-BY-STEP EXPLANATION:

When vacuuming the carpet, an exchange of matter and energy takes place between what is being vacuumed and the vacuum cleaner bag.

Therefore, we know that you are with the characteristics of an open system

Hubble calculated the velocities of galaxies in relation to their separation from Earth using the red shift. A graph created from the data displayed a straight line passing through the origin.

This demonstrates that a galaxy's velocity and separation from Earth are both linearly related. NASA began developing the Hubble Space Telescope (HST) in the 1970 . It was finally launched in 1990. HST is still in operating today, providing us with invaluable data and stunning views of deep space of course, from American astronomer Edwin Hubble.

Edwin Hubble made important advances in science. He noticed a shift in the galaxies' light frequencies and offered important proof of the recessional velocity.

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The speed of the object after 1 second and 2 seconds is 9.8 m/s and 19.6 m/s respectively.

The equation of motion to be used for calculation of velocity is -

v = u + at, where v and u are final and initial velocity, a is acceleration and t refers to time. Keep the value for each case to find the final velocity. The value of a will be acceleration due to gravity which is 9.8 m/s².

After 1 second

v = 0 + 9.8 × 1

v = 9.8 m/s.

After 2 seconds

v = 0 + 9.8 × 2

v = 19.6 m/s.

Hence, the required velocities are 9.8 and 19.6 m/s.

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The equations mentioned by Emily in the valuation analysis for Aspeon are as follows:

1) Equation (1): This equation represents the value of equity (S) and calculates it based on the EBIT (earnings before interest and taxes), the tax shield provided by debt (D), and the required return on debt (kd) and equity (ks). It implies that the value of equity is equal to the adjusted EBIT after deducting the tax shield from debt.

2) Equation (2): This equation calculates the total enterprise value (V) by adding the value of equity (S) and debt (D). It represents the total worth of the company, considering both equity and debt.

3) Equation (3): This equation calculates the price per share (P) by dividing the total enterprise value (V) minus the initial debt (D0) by the number of shares (n0). It represents the price per share based on the valuation of the company.

4) Equation (4): This equation calculates the new number of shares (n1) by subtracting the dividend (D) from the initial number of shares (n0) divided by the price per share (P). It represents the adjusted number of shares after the payment of dividends.

5) Equation (5): This equation calculates the levered value (VL) by adding the unlevered value (VU) with the tax shield value (TD). It represents the value of the company after considering the tax advantages of debt.

These equations provide a framework for valuation analysis, considering factors such as earnings, taxes, debt, and equity. They help assess the value and financial implications of Aspeon's growth prospects.

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Answer:

H2O

Explanation:

Answer:

H = 1/2 * g * t^2     since initial velocity is zero

v = g * t    where v is the final velocity

t = v / g

H = 1/2 g * v^2 / g^2 = 1/2 v^2 / g

v = (2 * H * g)^1.2

v = (2 * 500 * 9.8)^1/2 = 99 m/s

Check: t = v / g = 99 / 9.8 = 10.1 sec

H = 1/2 * 9.8 * 10.1^2 = 500 m

The statement which is false is as follows:

Thus, the correct option for this question is D.

Friction may be defined as a type of force that resists the sliding or rolling of one solid object over another through the surface that acts on it.

Friction is a force that takes place as the resistance of motion when one object rubs over another. Friction force always opposes the motion along with air resistance.

Friction can also be somehow reduced with the impact of lubrication over the rubbing surface. It is true that air resistance is greater the faster the object is traveling.

Air resistance does not depend on the blowing of the wind. It does not mean that if there is no wind blowing, the air resistance is negligible.

Therefore, the correct option for this question is D.

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The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.

The study of light and other radiation absorption and emission by matter is called spectroscopy. Electromagnetic radiation into its constituent wavelengths, in a spectrum, just like a prism splits light into a rainbow of colors.

The composition of a star is determined from the red or blue shift of spectral lines in a spectrum, the width of the spectral lines in the spectrum.

Hence, option D is correct.

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The focal-length eyepiece should be used to achieve a total magnification of 200 is -5 cm.

focal length of object f₀ = 4 × 10⁻³ m

focal length of eyepiece fe

length  L= 160 × 10⁻³ m

distance of closest distinct vision ( D=usually 250 mm)

magnification M = 200

fe= (-L / f₀ ) × (D/M)

  =(-160 × 10⁻³ / 4× 10⁻³) × (250 × 10⁻³ /200)

 fe = -0.05m = - 5cm

An eyepiece focal length is the distance from its principal plane to a single point where parallel light rays converge. At the point when being used, the central length of an eyepiece, joined with the central length of the telescope or magnifying instrument objective, to which it is connected, decides the amplification.

An image with a shorter focal length will be smaller, while an image with a longer focal length will be larger. The image is then magnified using the eyepiece, just like a microscope. A bigger picture to begin with will permit the eyepiece to deliver a higher amplification.

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The definitive treatment for appendicitis is usually surgical removal of the appendix, a procedure known as an appendectomy

The patient in question, a 12-year-old male, presented with nausea and vomiting accompanied by right lower abdominal pain. Acute appendicitis is a potential diagnosis that could explain the symptoms.

A brief overview of what PESILAD is PESILAD is an acronym that stands for Pain, Etiology, Signs, Impact, Learning, Anatomy, and Differential Diagnosis. PESILAD is a systematic method of assessing clinical cases that are widely used in medical education to teach students how to think like a doctor when diagnosing and treating patients.

What is acute appendicitis? Appendicitis is a condition in which the appendix, a small, thin tube that extends from the large intestine, becomes inflamed. It is a common condition that affects people of all ages, but it is more common in people between the ages of 10 and 30. Appendicitis can cause severe pain in the lower right abdomen, nausea, vomiting, fever, and other symptoms. The pain may start near the navel and move to the lower right side of the abdomen over time. Appendicitis is a medical emergency that requires prompt medical attention. If left untreated, the appendix can burst, leading to serious complications.

What is the diagnosis of Acute Appendicitis? The diagnosis of appendicitis is usually made based on a combination of a patient's symptoms, physical exam, and lab tests. In most cases, the doctor will perform a physical exam, check the patient's vital signs, and take a medical history to determine the cause of the symptoms. Blood tests and imaging studies, such as an ultrasound or CT scan, may also be ordered to help confirm the diagnosis.

The definitive treatment for appendicitis is usually surgical removal of the appendix, a procedure known as an appendectomy. In some cases, antibiotics may be used to treat the infection before surgery is performed.

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A blood test to look for infections, a urine test to rule out other causes, and imaging tests like an ultrasound or CT scan to see the appendix and look for inflammation are some of the procedures that may be performed.

Inflammation of the appendix, a tiny pouch situated in the lower right side of the belly, is a common symptom of acute appendicitis. Abdominal pain is the most common symptom, frequently beginning at the belly button and moving to the lower right abdomen.

A 12-year-old male who complains of right lower abdomen discomfort and nausea and vomiting may have acute appendicitis, according to a probable diagnosis. Other signs that could be present include fever, appetite loss, and right lower abdominal pain.

A healthcare provider often does a physical examination, examines the patient's medical history, and orders further testing to identify acute appendicitis. A blood test to look for infections, a urine test to rule out other causes, and imaging tests like an ultrasound or CT scan to see the appendix and look for inflammation are some of the procedures that may be performed.

The best course of action would be to consult with a healthcare professional, such as a surgeon, who can further evaluate the patient and determine the most appropriate treatment, which typically involves surgical removal of the inflamed appendix (appendectomy), if the clinical findings and diagnostic tests support the diagnosis of acute appendicitis.

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The focal length of the concave mirror is -37cm.To find the focal length of the concave mirror, we need to apply the mirror formula. The formula is: 1/f = 1/v + 1/u

Where f is the focal length, v is the image distance, and u is the object distance. According to the sign conventions, u is negative because the object is in front of the mirror, and v is negative because the image is formed behind the mirror. We are given u = -37cm and R = -22cm (since the mirror is concave), so we can find the image distance using the relation:

1/f = 1/v - 1/R
1/f = 1/-37 - 1/-22
1/f = -0.027
f = -37c

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By measuring the potential difference across the wire at different lengths, the resistance of the wire can be determined.

The experiment described involves measuring the resistance of a wire using a standard resistor and a sliding contact, also known as a jockey. The circuit includes a battery of a cell B, a standard resistor R, the wire AX, and the jockey. The voltmeter is used to measure the potential difference across the standard resistor, V, for different lengths of the wire, L.

To perform the experiment, the jockey is moved along the wire, and the voltmeter reading is recorded for different values of L. The length AP of the wire is measured, and the jockey is made to touch the wire at point P. The voltmeter reading, V, is recorded for this length, which represents the resistance of the wire at this point. This process is repeated for five other values of L to obtain the corresponding values of V.

By plotting a graph of V versus L, the resistance of the wire can be determined. The resistance is the ratio of the potential difference across the standard resistor, V, to the current through the circuit. Since the current is constant in this circuit, the resistance is proportional to the potential difference across the wire. Therefore, by measuring the potential difference across the wire at different lengths, the resistance of the wire can be determined.

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The mass of the seashell suspended by the two strands of spider silk is 0.28 kg.

The given parameters:

The mass of the seashell at equilibrium is calculated by applying Newton's second law of motion;

\(\Sigma F = 0\\\\T_1 sin(\theta) + T_2 sin(\theta) - W = 0\)

where;

The weight of the seashell is calculated as;

\(1.42 \times sin(75) \ + \ 1.42 \times sin(75) \ - W = 0\\\\2.743 - W = 0\\\\W = 2.743 \ N\)

The mass of the seashell is calculated as follows;

\(W = mg\\\\m = \frac{W}{g} \\\\m = \frac{2.743}{9.8} \\\\m = 0.28 \ kg\)

Thus, the mass of the seashell suspended by the two strands of spider silk is 0.28 kg.

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1. The magnitude of the bicyclist's acceleration is 4.09 m/s²

2. The distance travelled by the bicyclist during the time is 39.6 m

1. How to determine the acceleration

We can obtain the acceleration of the bicyclist as illustrated below:

a = (v – u) / t

a = (18 – 0) / 4.40

a = 18 / 4.40

a = 4.09 m/s²

Thus, the acceleration of the bicyclist is 4.09 m/s²

2. How to determine the distance travelled

The distance travelled by the bicyclist can be obtained as       follow:        

v² = u² + 2as

18² = 0² + (2 × 4.09 × s)

324 = 0 + 8.18s

324 = 8.18s

Divide both side by 8.18

s = 324 / 8.18

s = 39.6 m

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Answer:

9.8 meters per square second

Explanation:

Free Falling Object. the value of g is 9.8 meters per square second on the surface of the earth. The gravitational acceleration g decreases with the square of the distance from the center of the earth. But for many practical problems, we can assume this factor to be a constant.