What is the coefficient of friction?

Answer:

by marketing the product

Answer:

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Explanation:

hdjdkckfkvkfkfkxkfkck ex XD FB fact trees

Answer:

\(F=2.93\cdot 10^{-10}~N\)

Explanation:

Newton’s Law of Universal Gravitation

Objects attract each other with a force that is proportional to their masses and inversely proportional to the square of the distance.

\(\displaystyle F=G{\frac {m_{1}m_{2}}{r^{2}}}\)

Where:

m1 = mass of object 1

m2 = mass of object 2

r     = distance between the objects' center of masses

G   = gravitational constant: \(6.67\cdot 10^{-11}~Nw*m^2/Kg^2\)

The asteroids have masses of \(m1=5.34\cdot 10^{3}~Kg\) and \(m2=2.06\cdot 10^{4}~Kg\) and are separated by r=5,000 m.

Calculating the gravitational force:

\(\displaystyle F=6.67\cdot 10^{-11}~Nw*m^2/Kg^2~{\frac {5.34\cdot 10^{3}~Kg \cdot2.06\cdot 10^{4}~Kg}{5,000^{2}}}\)

Calculating:

\(\mathbf{F=2.93\cdot 10^{-10}~N}\)

Answer:

D. 2.93 x 10-10 N​

Explanation:

Answer got deleted? Dont delete my answer 'katie'

btw got it right

Answer:

a)  a = 0 m / s²

, b)  a = 0 ==> F = 0

, c)   a = - 2 m / s²

,d) v = 4 m/s

Explanation:

a) It is asked to find the acceleration in the interval from 0 to 2s, from the graph we see that in this interval the velocity is constant with a value of 4 me / s, therefore the average eceleration is

         a = (V₂ - V₁) / t

         a = (4 -4) / 2

         a = 0 m / s²

b) Newton's second law establishes a relationship between force and acceleration

        F = m a

  as acceleration is zero

        a = 0 ==> F = 0

c) the acceleration in interval 2 a4 S

          a = (0 - 4) / (4-2) = -4 / 2

          a = - 2 m / s²

The negative sign iniquity the acceleration is slowing the movement

d) the force is

        F = m a

        F = 2 m

e) from the graph we can read the speed of the vehicle for time

        v = 4 m / s

The brightest star in the constellation Lyra is Vega. Vega is a bluish-white main-sequence star located approximately 25 light-years away from Earth.

It is one of the most prominent stars in the northern sky and is easily recognizable due to its brightness.

Vega is considered one of the three stars that form the Summer Triangle, along with Altair in Aquila and Deneb in Cygnus. These stars are visible during the summer months in the Northern Hemisphere and are used as prominent markers in the night sky.

Vega is also of significant astronomical importance as it served as the reference star for the calibration of the magnitude scale. Its spectral type and luminosity have been used as a standard for comparison with other stars.

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A third positive charge \(x = \frac{2\sqrt{2}a }{1+\sqrt{2} }\) can be placed on the x-axis so that the net electric force on it is zero.

whilst -factor charges are in touch, there may be

\(F = k \frac{q_{1}q_{2} }{ r^{2} }\)

Where

\(k = 9 * 10^{9} Nm^{2}C^{-1}\) = the coulomb constant.

The charges' magnitudes are \(q_{1}\) and \(q_{2}\).

r is the separation of the charges.

Let,

The third charge equals Q at, x equals x from the source.

because there is no net force acting on the third charge.

Hence,

\(f_{1} + f_{2} = 0\)

⇒ \(k\frac{(2q)Q}{x^{2} }-k\frac{qQ}{(2a-x)^{2} } = 0\)

⇒ \(\frac{2}{x^{2} } - \frac{1}{(2a-x)^{2} } = 0\)

⇒ \(\frac{2}{x^{2} } = \frac{1}{(2a-x)^{2} }\)

⇒ \(\frac{\sqrt{2} }{x} = \frac{1}{2a-x}\)

⇒ \(2\sqrt{2}a - \sqrt{2} = x\)

⇒ \(x = \frac{2\sqrt{2}a }{1+\sqrt{2} }\)

handiest when forces resulting from previous prices cancel every different out will the pressure on a third fee be 0.

at the same time as the pressure between  identical costs is repulsive and is interpreted as high-quality, the pressure between two opposing expenses is attracted and is interpreted as bad.

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Answer:

B) is the answer

Explanation:

A) is 25 N

B) is 36N

C) is 30N

D)15N

I agree with your friend unconditionally. Radio waves and sound waves are both types of waves, but they are very different in their properties. The wavelength of a radio wave is much longer than the wavelength of a sound wave.

Radio waves are electromagnetic waves, while sound waves are mechanical waves. Electromagnetic waves do not need a medium to travel through, while mechanical waves do. This means that radio waves can travel through vacuum, while sound waves cannot.

The speed of a wave is determined by its wavelength and frequency. The wavelength of a wave is the distance between two consecutive peaks of the wave, and the frequency is the number of waves that pass a point in a given amount of time. The speed of a wave is equal to the product of its wavelength and frequency.

The wavelength of a radio wave is much longer than the wavelength of a sound wave. For example, the wavelength of a radio wave with a frequency of 100 MHz is about 3 meters, while the wavelength of a sound wave with a frequency of 100 Hz is about 340 meters. This means that the speed of a radio wave is much faster than the speed of a sound wave.

In vacuum, the speed of a radio wave is c = 3 × 108 m/s, while the speed of a sound wave is about 340 m/s. This means that a radio wave travels in vacuum appreciably faster than any sound wave.

Therefore, I agree with your friend unconditionally.

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The acceleration of the cabinet and the normal reactions on the pair of rollers are both 0.  

Rollers at a and b that have negligible mass, we can use the equations of motion for the cabinet and the rollers. The equations of motion are:

For the rollers:

m*a = \(F_n - F\)

The net force on the cabinet is equal to the force applied to it by the person pushing it, minus the force of friction between the cabinet and the inclined plane. The force of friction is equal to the coefficient of friction between the cabinet and the inclined plane multiplied by the normal force exerted on the cabinet by the inclined plane

The normal force exerted on the cabinet by the inclined plane is equal to the weight of the cabinet multiplied by the coefficient of friction between the cabinet and the inclined plane.

The coefficient of friction between the cabinet and the inclined plane is usually small, so we can neglect it in the equations of motion.

We can also neglect the mass of each roller, so we can assume that the normal reactions on the rollers are negligible.

Equations of motion, we get:

m*a = F

m*a = 0

Solving these equations simultaneously, we can determine the acceleration of the cabinet and the normal reactions on the pair of rollers.

The acceleration of the cabinet is given by:

a = F / m

The normal reaction on each roller is given by:

a = F / m

here m is the mass of each roller.

Therefore, the acceleration of the cabinet and the normal reactions on the pair of rollers are both 0.  

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Answer:

A first-class lever has the fulcrum between the load and the effort. A second-class lever has the load between the effort and the fulcrum. A third-class lever has the effort between the load and the fulcrum. A see-saw is an example of a first-class lever.

Explanation:

Answer:

a)  600 meters

b) between 0 and 10 seconds, and between 30 and 40 seconds.

c) the average of the magnitude of the velocity function is 15 m/s

Explanation:

a) In order to find the magnitude of the car's displacement in 40 seconds,we need to find the area under the curve (integral of the depicted velocity function) between 0 and 40 seconds. Since the area is that of a trapezoid, we can calculate it directly from geometry:

\(Area \,\,Trapezoid=(\left[B+b]\,(H/2)\\displacement= \left[(40-0)+(30-10)\right] \,(20/2)=600\,\,m\)

b) The car is accelerating when the velocity is changing, so we see that the velocity is changing (increasing) between 0 and 10 seconds, and we also see the velocity decreasing between 30 and 40 seconds.

Notice that between 10 and 30 seconds the velocity is constant (doesn't change)  of magnitude 20 m/s, so in this section of the trip there is NO acceleration.

c) To calculate the average of a function that is changing over time, we do it through calculus, using the formula for average of a function:

\(Average\,of\,f(x)=\frac{1}{b-a} \int\limits^b_a {f(x)} \, dx\)

Notice that the limits of integration for our case are 0 and 40 seconds, and that we have already calculated the area under the velocity function (the integral) in step a), so the average velocity becomes:

\(Avearage=\frac{600\,\,m}{40\,\,s}= 15\,\,\frac{m}s}\)

Answer:

A change in the size of the population may bring about changes in the culture. For example, food brought to this country by immigrant groups have become common in many American kitchens. Population increases and decreases affect the economy. For example, by increasing the demand for goods and services, a growing population may increase employment and stimulate the economy. An increase in the general population also means that there are more people occupying the same amount of space, which creates more crowded conditions. In addition, the larger population brings increased demand for energy, food, housing, schools, stores, and transportation. People also bring about changes simply by moving from one place to another. Migrations of people within a country can cause social changes, such as the loss of regional distinction within the country. Social and cultural changes also result from changes in the average age of a population. When fewer people are having babies, for example, there is less need for schools, recreation centers, and other services geared toward children.

Explanation:

Population changes stimulate social change in a variety of ways, including direct and indirect changes in food habits and the educational system, migration patterns, and people's overall mental and physical health.

Population growth is a negative factor for the environment because rural areas are converting to urban areas and more people are migrating to cities. Due to this rapid population growth, a food shortage will occur, the cost of living will increase in the advanced cities, the demand will increase but not the supply, and this will lead to mental pressure on the generation to keep a place to live and food to eat and in this way the social change will happen.

Hence, population changes stimulate social change in a variety of ways, including direct and indirect changes in food habits and the educational system, migration patterns, and people's overall mental and physical health.

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Given :

Capacity of capacitor is, \(C = 10\ \mu F\).

To Find :

At what voltage can a 10 μF capacitor be energized to 0.45 J.

Solution :

We know, energy in capacitor is given by :

\(E = \dfrac{CV^2}{2}\)

So,

\(V = \sqrt{\dfrac{2E}{C}}\\\\V = \sqrt{\dfrac{2\times 0.45}{10}}\ \mu V\\\\V = 0.3 \ \mu V\)

Therefore, voltage required is \(0.3 \ \mu V\) .

Answer:

For metric-system conversions, follow this method: Sound travels at about 340 m/s, so multiply the number of seconds you counted by 340, and you'll know how many meters away lightning struck. A three-second count, then, would place the lightning strike about 1,020 m away, or roughly 1 km.

Explanation:

hope it hep and if it doesnt sorry

The distance struck by the lighting flashes is 680 m.

The given parameters;

The distance struck by the lighting is calculated by applying the principle of echo as follows;

\(v = \frac{2d}{t} \\\\2d = vt\\\\d = \frac{vt}{2} \\\\d = \frac{340 \times 4}{2} \\\\d = 680 \ m\)

Thus, the distance struck by the lighting flashes is 680 m.

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The element that is evident here is the importance of Christian practices. Option A

In the excerpt as we can see below, there is the depiction of the court life of the medieval era. In that era, there was quite a lot of tendency of the people to be very religious and the norms of the Christian faith was in the highest regard.

As such, in the medieval times, Christianity was a state religion in many cultures and its practices became an integral part of the national life of the people not only in England but across the world.

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Missing parts;

Read the excerpt from Sir Gawain and the Green Knight. When the King and his knights came into the hall, The chanting in the chapel had come to an end And a loud cry went up from the clerics and the others Proclaiming Noel once more, calling out the word again, And then the nobles ran and got the gifts ready . . . What element of medieval court culture is evident in the excerpt? the importance of Christian practices the acts of warfare over land rights the proper conduct of knights the subjects’ loyalty to their lords

Answer: a

Explanation: christian practices

Answer:

the second force

Explanation:

this is the answer i hade for mine

Could someone help me? A cannon is fired with an initial horizontal velocity of 20 m/s and initial vertical velocity of 25 m/s . After 3s in the air, the canon hits its target. How far away was the canon from its target?

A high jumper leaves the ground with an initial velocity of 10 m/s rightward at an angle of 15 degrees . What is the high jumper's initial horizontal velocity?

Answer:

Explanation:

true

Given,

The force applied by each person who is pushing the object, F=50 N

The frictional force, f=20 N

The frictional force is the force that opposes the motion of the object. As the people are pushing the object to the right, the frictional force will be directed to the left. And as the force with which people are pushing is greater than the frictional force, the net force will also be directed towards the right.

The net force is given by,

On substituting the known values,

Therefore the net force on the object is 80 N to the right.

Thus the correct answer is option 4.

Answer:

33 m/s

Explanation:

Answer: B

Explanation:

As gas bubbles accumulate, the upward pressure increases, forcing cracks in the rocks to widen, often in the direction of Earth's surface. For magma to erupt from a volcano, this upward pressure must exceed the downward pressure that is exerted by the eight-kilometer (five mile) thick load of rock overhead.

Answer:

metal conducts heat faster than wood. which means the metal conducted heat away from your hand (or whatever it is) faster than wood.

Explanation:

just because they feel warm/cold doesn't always mean that it is warm/cold. if they both were sitting at room temp for a long time, then both will eventually reach the temp of the room. even though they are the same temp the metal will feel colder than the wood because of the thermal conductivity of the metal compared to the wood.

The different thermal conductivities of metal and plastic are important in the design of the bowl is metal conducts heat faster than Plastic. which means the metal conducted heat away from your hand (or whatever it is) faster than Plastic.

Thermal conductivity can be defined as the degree to which heat is transmitted through the cross-section of the unit of an object, where the temperature exits directly across the surface.

Electrical conductivity is a measure of how much energy (moving charge) can pass through objects under the influence of a used electric field. Thermal conductivity measures how heat (heat moving energy) can pass through objects below temperature differences.

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That is correct

There is not answer choices but I think its true

Are you good with compare and contrasting?

If so, look at my recent question please

Answer:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. While an endothermic process absorbs heat and cools the surroundings

Explanation:

Answer:

Basically, endothermic feels cooler to touch than exothermic.

Explanation:

Endothermic reactions are just reactions that emit energy (in form of heat) to its surroundings. Exothermic ones, on the other hand, draw energy from its surroundings to occur.

Always think - "Endothermic is cool. Exothermic is not cool."

If a person whirls an object horizontally in a counter-clockwise direction and the string breaks at point P, the rock will follow a path that is determined by the combination of its initial horizontal velocity and its vertical velocity due to gravity.

Without additional information about the object's initial velocity and the distance from the point of release to the ground, it is difficult to determine the exact path that the rock will follow. However, it is likely that the rock will follow a curved path, where gravity causes the rock to fall vertically downward while the horizontal velocity causes it to continue moving horizontally. This path is known as a parabolic path or a projectile motion.

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the angle through which the wheel turns in 39 s is approximately 1.5 × 10^4 radians or 8.4 × 10^5 degrees.

(a) To convert revolutions per minute (rpm) to radians per second (rad/s), we need to multiply by a conversion factor of 2π/60. Therefore, the angular velocity of the wheel in radians per second is:

ω = (2π/60) × 3.60 × 10^3 = 376.99 rad/s

Rounding to two significant figures, we get:

ω ≈ 3.8 × 10^2 rad/s

Therefore, the angular velocity of the wheel is approximately 3.8 × 10^2 rad/s.

(b) The angle through which the wheel turns in 39 s is given by:

θ = ωt

where θ is the angle in radians, ω is the angular velocity in radians per second, and t is the time in seconds. Substituting the known values, we get:

θ = (376.99 rad/s) × (39 s) = 14716.61 rad

Rounding to two significant figures, we get:

θ ≈ 1.5 × 10^4 rad

To convert this to degrees, we use the conversion factor of 180/π. Therefore, the angle in degrees is:

θ = (180/π) × 14716.61 rad = 842,700.29°

Rounding to two significant figures, we get:

θ ≈ 8.4 × 10^5°

Therefore, the angle through which the wheel turns in 39 s is approximately 1.5 × 10^4 radians or 8.4 × 10^5 degrees.
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The magnitude of the ant's displacement relative to its original position is 43 cm.

Magnitude is a measure of the size or strength of something. It is usually expressed as a numerical value, such as a number on a scale. Magnitude can refer to physical and non-physical qualities, such as the size of a building or the intensity of an emotion. For example, an earthquake can be measured in terms of its magnitude, which is the amount of energy released during the earthquake. Magnitude can also refer to the brightness of a star, or the size of a hurricane. In astronomy, magnitude is used to measure the brightness of a star or other celestial object.

This is because the ant traveled 3.0 x 101 cm eastward, then 25 cm northward, and then 15 cm westward. The total magnitude of the displacement is the sum of the magnitudes of the individual displacements, which is 3.0 x 101 + 25 + 15
= 43 cm.

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Streamflow is the flow of water in streams, rivers, and other channels, and is a key component of the water cycle. It's influenced by a variety of factors, including the shape and depth of the riverbed, the gradient of the stream, the size and shape of the channel, and the amount of water flowing through it. The given statement is false.It is affected by many factors.

All of these factors influence the velocity of the streamflow. Riverbed and streamflow relationshipThe velocity of streamflow is primarily influenced by the gradient or slope of the riverbed. A shallow slope will not yield high velocity streamflow, but instead will create a slow-moving, meandering stream with a high potential for sedimentation and erosion. In contrast, a steep gradient will create a fast-moving stream with a higher velocity and more turbulent water. As a result, a steeper slope will produce higher velocity streamflow than a shallower slope, which will produce slower-moving streamflow. Therefore, a riverbed with a shallow slope will not yield high velocity streamflow. The statement is false.

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