Compare and contrast fluorescent and incandescent light bulbs.

The mirror is required to be concave in order to form an image with a magnification of 82%.  

To form an image that is 4.60 times the size of an object on a screen located 5.40 m from the object, the mirror must be concave.

The distance from the object to the mirror is given as 5.40 m, and the distance from the mirror to the screen is given as 5.40 m. The focal length of the mirror is the distance between the mirror and the image, which is located behind the mirror.

The magnification of the mirror can be calculated using the formula:

magnification = image distance / object distance

If the image is 4.60 times the size of the object, then the magnification is:

magnification = image distance / object distance

4.60 / 5.40 = 0.82 or 82%

Therefore, the mirror is required to be concave in order to form an image with a magnification of 82%.  

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Answer:

u don't know this one but try a not for sure

Answer:

The correction is the state of mind being for the Fahrenheit that is calculator from anarchy

Explanation:

Answer:

Si system is :kilo miligram kelvin

us system is: Fahrenheit Ounce yard inch

Explanation:

Based on the galaxies found in the local group of galaxies, the most common type of galaxy in the universe is expected to be the dwarf galaxy. Dwarf galaxies are smaller and less massive than other types of galaxies, such as spiral or elliptical galaxies. They contain fewer stars, with some having only a few hundred or thousand stars, compared to the billions of stars found in larger galaxies.

Dwarf galaxies are also much more numerous than larger galaxies, making up about 80% of the galaxies in the universe. They are thought to have formed early in the history of the universe, and their small size means they have experienced less evolution and disruption than larger galaxies.

Despite their small size, dwarf galaxies play an important role in the evolution of the universe. They are believed to be the building blocks of larger galaxies, and their dark matter content may provide clues to the nature of dark matter, which makes up about 85% of the matter in the universe. Overall, the prevalence of dwarf galaxies suggests that they are an important piece in understanding the structure and evolution of the universe.

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Answer:

Law 2:

Pushing a baby on a swing is easier than pushing an adult on the same swing. Water spills from a glass carried by someone who is walking steadily and suddenly stops short.

Law 2:

When thrown with the same force, a soccer ball accelerates more than a bowling ball.

Law 1:

A magician pulls a tablecloth out from under a dish on a table without disturbing the dish.

Law 3:

A rocket launches into space, pushing fuel exhaust in one direction and the rocket in the opposite direction.

Law 1:

A book rests on top of a shelf and does not move until a student accidentally knocks it off.

Explanation:

Newton's laws of motion:

Law 1: Law of inertia

Law 2: Law of force (F = mass x acceleration)

Law 3: Law of Action & Reaction

The laws followed by the given situations are Newton's law of force, Law of inertia and Newton's third law.

Inertia is defined as the tendency of an object to continue its state of rest or motion.

Here,

Considering the situations given,

1. Pushing a baby on a swing is easier than pushing an adult on the same swing.

This is because, the mass of the baby is lesser than that of the adult. So, according to Newton's force equation,

Force, F = ma

Therefore to push a body with more mass, more force should be applied.

Another situation that follows this law from the given situations is:

When thrown with the same force, a soccer ball accelerates more than a bowling ball.

2. Water spills from a glass carried by someone who is walking steadily and suddenly stops short.

This is due to the inertia of the water in the glass. This can be explained by law of inertia.

Another situation that follows this law from the given situations is:

A magician pulls a tablecloth out from under a dish on a table without disturbing the dish.

A book rests on top of a shelf and does not move until a student accidentally knocks it off.

3. A rocket launches into space, pushing fuel exhaust in one direction and the rocket in the opposite direction.

This is according to Newton's third law of motion. The law of action and reaction.

Hence,

The laws followed by the given situations are Newton's law of force, Law of inertia and Newton's third law.

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The force exerted by the biceps and the elbow is 239.9 N and 215.89 N respectively.

When we use only your forearms to lift an object, assume that your biceps are the main muscle that lifts your arm. Suppose the weight of the forearm he is 1.50 kg. If the biceps is attached to the forearm 2.50cm from the elbow, with the forearm parallel to the floor, flex the biceps to hold a 950g ball on the end of the elbow at a distance of 36.0cm from the elbow.

Against this background,

forearm mass = 1.50 kg

forearm length = 2.50 cm

The weight of the ball is 950 g.

36.0 cm ball spacing

Forearm strength needs to be calculated. Balance Elbow Using

Torque,

Fb x Db = Wf x Df/2 + Wball x Dball

Putting Value,

Fb x .025 = 1.5 x 9.8 x .36/2 + 0

95 x 9.8 x 0.36

Fb = 239.9 N

Now elbow force,

Fb = Fl + Wf + Wb

Fl = Fb - Wf - Wb

Putting value,

Fl = 239 .9 - (1.5 x 9.8 ) - (0.95×9.8)

Fl = 215.89 N.

Therefore the force on the elbow is 215.89 N.

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Answer: Examples are --- Water and oil , nails and sand  and are called Heterogeneous mixtures ,

Explanation:

A mixture is a combination of  two or more substances without a  chemical reaction which individual  components having retain their properties, We have two types of mixtures

Homogeneous-- Is a mixture, whether solid liquid or gas that contains proportions in such a way that one can hardly identify  each components by looking eg --air, ink etc

Heterogeneous- Is a mixture in which the physical properties of individual components are maintained  eg --- Rice and beans , water and oil, nails and sand.

Another way to keep food warm till you arrive at the hospital is by putting the food in a foil and wrapping it up with a towel to retain the heat.

Food preservation is defined as the process by which a cooked food or process food is kept in such a way that microorganisms cannot affect their taste and texture.

To prevent a cooked food from getting cold, you can put the food in an aluminium foil and wrap it with a towel to prevent heat loss.

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C. The placement of the ammeter in the circuit

Objects of the same volume can have different masses due to variations in their **density**.

Density is defined as mass per unit volume and represents how much mass is packed into a given volume. If two objects have the same volume but different densities, their masses will differ.

For example, consider two cubes of the same size, but one is made of iron and the other is made of aluminum. Iron is denser than aluminum, which means that for the same volume, the iron cube will have more mass compared to the aluminum cube.

The density of an object depends on its composition, arrangement of particles, and the forces acting between them. Different materials can have different densities due to variations in their atomic or molecular structure.

Therefore, even though objects may occupy the same volume, their masses can differ if their densities vary. It is the density of the material that determines how much mass is contained within a given volume.

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The first two steps for finding the magnitude of the resultant vector is find the sum of the two horizontal vectors and the sum of the two vertical vectors.

The resultant of two vectors is determined from Pythagoras theorem is as shown below.

R² = a² + b²

Thus, the first two steps for finding the magnitude of the resultant vector is find the sum of the two horizontal vectors and the sum of the two vertical vectors.

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Answer:

Ingles porfavor

Explanation:

Answer:

j type the question into wolfram it gives you answer plus explanation

Answer:

D.20 W

Explanation:

P=W/t

P=2000 J / 10 sec

p=200 Watts

16.03 m/s is the initial speed of the cans.

Newton’s equations of motion has to be used to solve it;

He wants collision at height (h) = 4.0 m

The acceleration due to gravity  as,

                                                      g =9.8ms−²

The initial speed of the thrown can is calculated by:

h = vt - ¹/₂gt²

4 = 3t - (0.5)(9.8)(3)²

4 = 3t - 44.1

3t = 48.1

t = 48.1/3

t = 16.03 m/s

Thus, the initial speed of the boy's thrown can is 16.03 m/s.

By measuring the rate at which the velocity varies with regard to the passage of time, one can calculate the acceleration of a body. By calculating the rate at which the displacement varies with regard to the passage of time, the velocity may be calculated. The perpendicular distance between the body's initial and final locations is its displacement. These are all vector quantities, meaning they all have both magnitude and direction.

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Two examples of exceptions to the general rules of the patterns of motion in our solar system are Retrograde motion and  Irregular moons

Two examples of exceptions to the general rules of the patterns of motion in our solar system are retrograde motion and irregular moons.

1. Retrograde motion: Retrograde motion refers to the apparent backward or reverse motion of a planet in its orbit. Normally, planets move in a prograde or eastward direction around the Sun. However, due to the varying orbital speeds of planets, there are times when a planet appears to slow down, reverse its direction, and move westward relative to the background stars. This is known as retrograde motion. It occurs because of the differences in orbital periods and distances of planets from the Sun.

2. Irregular moons: Most moons in the solar system follow regular, predictable orbits around their parent planets. However, there are some moons, known as irregular moons, that have more eccentric and inclined orbits. These moons exhibit irregular patterns of motion compared to the regular, prograde motion of the larger moons. Their orbits may be highly elongated, inclined, or even retrograde. Examples of irregular moons include the moons of Jupiter, such as Ananke and Carme. These exceptions highlight the complexity and diversity of celestial motion within our solar system, demonstrating that not all celestial bodies follow the same predictable patterns of motion as the planets.

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(a) The power is Pnew/P0 = 0.25,

(b) The voltage is ΔVnew/ΔV0 = 2.

(c) The voltage is ΔVnew/ΔV0 = √2,

(d) The current is Inew/I0 = √2.

(a) Power is proportional to the square of voltage and inversely proportional to resistance, so when resistance is doubled and current is constant, the new power will be one-fourth (0.25) of the original power.

(b) Since current is constant, the voltage across the resistor is proportional to resistance, so when resistance is doubled, the voltage across the resistor will be twice the original voltage.

(c) Power is proportional to the square of voltage, so when power is doubled and resistance is constant, the new voltage will be the square root of two (√2) times the original voltage.

(d) Power is proportional to the square of current, so when power is doubled and resistance is constant, the new current will be the square root of two (√2) times the original current.

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Answer:

vote me brainliest

Explanation:

The magnitude B of the magnetic field at the center of the semicircles is given by these expression B = (μ₀(I(outer) - I(inner)))/(π(a + b)). The B in terms of the asked variable.

In this case, we have two concentric semicircles, each carrying current in opposite directions. Let's consider a circular loop with radius r, where a < r < b. The magnetic field at the center of this loop will be the sum of the magnetic fields produced by the two semicircles.

For the outer semicircle (radius b), the magnetic field at the center can be calculated as follows:

∮ B · dl = μ₀I(outer)

For the inner semicircle (radius a), the magnetic field at the center has the opposite direction, so the equation becomes:

∮ B · dl = -μ₀I(inner)

Since the circular loop with radius r contains both the inner and outer semicircles, we can add these equations together:

∮ B · dl = μ₀(I(outer) - I(inner))

The line integral ∮ dl represents the circumference of the circular loop, which is 2πr:

B(2πr) = μ₀(I(outer) - I(inner))

B = (μ₀(I(outer) - I(inner)))/(2πr)

In this case, as we are interested in the magnetic field at the center of the semicircles, the radius r would be the average radius between a and b, given by:

r = (a + b)/2

Substituting this value into the equation, we get the final expression for the magnitude B of the magnetic field at the center of the semicircles:

B = (μ₀(I(outer) - I(inner)))/(2π((a + b)/2))

B = (μ₀(I(outer) - I(inner)))/(π(a + b))

Therefore, the magnitude B of the magnetic field at the center of the semicircles is given by B = (μ₀(I(outer) - I(inner)))/(π(a + b)).

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Answer:

I believe D

Explanation:

Of course the manufacturer would most likely be biased to the product the have created, but the other sources would have no reason to. Hope this helps!

Answer:

distance=10km=10*1000=10000m

time=5min=5*60=300sec

average speed=distance/time

= 10000/300=33.33m/s

Explanation:

Given:

The time period for which Nora rides the bicycle, t=5 min

The speed of the bicycle, s=10 m/s

To find:

The description of the ride.

Explanation:

The speed is a scalar quantity and has only magnitude. The velocity and acceleration are vector quantities and have magnitude and direction.

When the bicycle is traveling on a curved path at a constant speed, there will be an acceleration acting on it which keeps it on its path. This acceleration is called the centripetal acceleration.

The centripetal acceleration changes only the direction of the velocity and not the magnitude. Thus the speed will be constant. But the velocity will be changing at a constant acceleration.

According to Lazarus' cognitive appraisal approach, the first step in appraising a stressor is called "primary appraisal."

In this step, an individual evaluates the significance of a stressor and determines whether it is a threat, challenge, or irrelevant to their well-being.

Primary appraisal involves evaluating the significance and meaning of an event or situation in relation to one's well-being. It involves assessing whether the event is irrelevant, benign or positive (no stress), or if it is potentially stressful (stressful). If the event is appraised as stressful, it leads to further cognitive appraisals, such as assessing the harm or threat posed by the stressor and evaluating one's coping resources and options (secondary appraisal).

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Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :

Step 1: Calculate the velocity using the equation:

\(v = u + at\)

where:

- \(v\) is the final velocity

- \(u\) is the initial velocity (0 m/s, as the car starts from rest)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)

Step 2: Calculate the distance traveled using the equation:

\(s = ut + \frac{1}{2}at^2\)

where:

- \(s\) is the distance traveled

- \(u\) is the initial velocity (0 m/s)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)

Now, let's simplify these equations:

\(v = 3 \times 50\)

\(s = \frac{1}{2} \times 3 \times 50^2\)

Calculating the results:

\(v = 150\) m/s

\(s = 3750\) meters

Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.

The magnitude of the electric field in the steady state is equal to the product of the velocity of the electrons and the magnetic field strength. The units are volts per meter (V/m).

To find the magnitude of the electric field in the steady state, we need to first understand the situation described in the question. A wire is being subjected to both a magnetic force and an electric force. The magnetic force is causing the electrons in the wire to move in one direction, while the electric force is causing them to move in the opposite direction. The goal is to find the strength of the electric field that will balance out the magnetic force, so that the electrons will continue to move at a steady rate.

To calculate the magnitude of the electric field, we can use the following formula:

E = F/q

Where E is the electric field, F is the force exerted on the electrons by the charge separation, and q is the charge of each electron.

We know that the magnetic force on the electrons is given by the formula:

Fm = qvB

Where Fm is the magnetic force, v is the velocity of the electrons, and B is the magnetic field strength. We can assume that the magnetic field is perpendicular to the wire, so that the force is perpendicular to the velocity.

In order for the electric force to balance out the magnetic force, we need:

Fe = Fm

Where Fe is the electric force on the electrons. Solving for Fe, we get:

Fe = qvB

Substituting this into the formula for the electric field, we get:

E = (qvB)/q

Simplifying, we get:

E = vB

So the magnitude of the electric field in the steady state is equal to the product of the velocity of the electrons and the magnetic field strength. The units are volts per meter (V/m).

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Answer:

:)

Explanation:

i need 5 points i really do :)

The image where the rod is held near to the left side of the sphere on the stand, making the left side of the sphere become positively charged, best represents the resulting charge distribution on the conducting sphere.

Since the rod is too far away to contact the remaining portion of the sphere, it will remain neutral. The electrons in the sphere's substance will be drawn away from the positive charge on the left side of the sphere, leaving a region of positive charge there. The electrons will stay put on the right side of the sphere, creating a neutral charge there.

The image is provided below

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(a) Take into account that the centrifugal force experienced by each car is given by:

where v1 and v2 are the speed of both cars and R1 and R2 are the radius of the curve traveled by each car, m is the mass of the cars.

If you solve for m, you obtain:

due to the masses of the cars are identical, you have:

(b) Now, consider that:

R1 = 2R

v1 = v

R2 = 6R

v2 = 3v

Now, divide the equation for F1 over the equation for F2, replace the previous expressions for the parameters and simplify for F1:

Answer:

To the right

Weight

Explanation:

A recognizable group of stars that is smaller than a constellation is known as an asterism.                                                                                        

An asterism can be a recognizable pattern or shape formed by a few bright stars within a constellation, such as the Big Dipper in the constellation Ursa Major. While constellations are officially recognized by the International Astronomical Union and have specific boundaries, asterisms are not officially recognized and can vary based on cultural and regional interpretations of the stars in the sky.
Some well-known examples of asterisms include the Big Dipper, which is part of the Ursa Major constellation, and the Pleiades or Seven Sisters, which is located within the Taurus constellation. These easily identifiable groupings of stars serve as valuable celestial landmarks for amateur stargazers and professional astronomers alike.

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Answer:

in science and engineering , the weight of an object is the force acting on the object due to gravity.