The force of friction on a sliding object is 50 n. the applied force needed to maintain a constant velocity is?

d = -1 m

The negative sign indicates that the charge from that force of the space of the two spheres.

When charged matter is exposed to an electromagnetic field, its electric charge—a property of matter—causes it to feel a force. An electric charge can be either positive or negative (commonly carried by protons and electrons respectively). Like and unlike charges are attracted to one another while being repelled by the other. Neutral describes a thing without any net charge. Classical electrodynamics, a term coined to describe early understanding of the interactions of charged particles, is still applicable to issues that do not demand for taking quantum effects into account.

The net charge, or the total of the positive and negative charges, is constant in an isolated system because electric charge is a conserved attribute. Electrical charge is transported by subatomic particles.

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The bird should fly at an angle of roughly South 23.58° East if it wants to move directly southward in relation to the earth.

The magnitude of the bird's velocity is 100 km/h, among other components of the velocity.

North-South direction equals the direction of the bird.

Wind velocity is 40 km/h in magnitude.

The wind is blowing in an east to west direction.

The two velocities' component vectors are as follows:

Bird's velocity is v = -100 j.

Wind speed, v = 40 i.

If a bird has a southerly velocity, it will move in that direction.

component of velocity to account for the wind's speed.

Let be the angle of the bird's direction in relation to the

we have a negative x-axis.

In the third quadrat, -100 cos = -40 I 66.42°,

Given that the y and x numbers in the third quadrat are both negative, -100 cos = -40i 66.42°.

Therefore, the angle in the south-west direction is 90 - 66.42 23.58°.

Therefore, to fly directly southward relative to the ground, the bird should fly in the direction of south 23.58° east.

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On a cosmic calendar which compresses the history of the universe into one year, our milky way galaxy probably formed on March 1st.

A cosmic calendar can be defined as a scale on which the history of the universe is compressed into one (1) year. This ultimately implies that, a  cosmic calendar is used by astronomers and scientists alike to compress the history of the universe is compressed into one (1) year.

Based on the information on a cosmic calendar which compresses the history of the universe into one (1) year, we can reasonably infer and logically deduce that our milky way galaxy was probably formed on March 1st.

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The Magnitude of the electric field intensity at the location of yellow dot will be -

E = Q/4πε₀Kr²

We have a Yellow dot situated at distance of r meters from the charge.

We have to find the magnitude of Electric field at this Yellow dot.

The electric field of a charge is the region around the charge in which the influence of charge's electrostatic force can be felt or measured.

According to the question -

Assume that the Yellow dot is at distance 'r' meters apart from the Point charged particle Q. Now, the Electric field intensity at the yellow dot distanced 'r' meters apart will be -

E = Q/4πε₀Kr²

The above formula will give the intensity at the yellow dot. Since the source charge is positive, therefore the direction of the electric field will be away from the charge.

Hence, the Magnitude of the electric field intensity at the location of yellow dot will be -

E = Q/4πε₀Kr²

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The heat of the surroundings is  - 4482 J.

A calorimeter is a device in which that is no exchange of heat between the device and the environment. In other words, there could only be exchange of heat when the a substance has been put inside the calorimeter.

We know that in a calorimeter;

Heat of the surrounding =  Heat of the system

That implies that they are of the same magnitude but of opposite direction hence the heat of the system is - 4482 J.

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The equivalent resistance rab at terminals a through b for each circuit is Rab=16 ohm.

Parallel resistors of 10 and 40 ohms are used. Their comparable resistance is, thus,

(10x40)/(10+40)=400/50=8 ohm

Also,

Parallel resistors of 5 and 20 ohms are used. Their comparable resistance is, thus,

(5×20)/(5+20)=100/25=4 ohm

Since the two comparable resistors mentioned above are connected in series, the overall equivalent resistance is [tex]R_{ab}[/tex]=4+8=12 ohm

Circuit (b)

Parallel resistors of 30, 20, and 60 ohms are used. Their corresponding resistance is provided by

[tex]\frac{1}{R}=\frac{1}{30}+\frac{1}{20}+\frac{1}{60}=\frac{1}{10}[/tex]

Hence, equivalent resistance here is=10 ohms.

The specified 10 ohm resistance is now in series with this corresponding 10 ohm resistance.

As a result, the total equivalent resistance is 10+10=20 ohms.

Now, this 80 ohm resistance and its counterpart 20 ohm resistance are connected in parallel.

So, their equivalent resistance is

(80×20)/(80+20)=1600/100=16 ohm

Hence, Rab=16 ohm.

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Answer: Is the atomic theory still valid today?

Although two centuries old, Dalton's atomic theory remains valid in modern chemical thought. 1) All matter is made of atoms. Atoms are indivisible and indestructible. 3) Compounds are formed by a combination of two or more different kinds of atoms.

Explanation: hope this helps!!!

The work done on the cylinder against the external pressure is 408.34 J.

The work done on the cylinder against the external pressure is calculated as follows;

W = PΔV

where;

Substitute the given parameters and solve for work done on the cylinder.

W = 13 atm (0.46 L - 0.15 L)

W = 4.03 atm.L

1 atm.L = 101.325 J

4.03 atm.L = ?

= 408.34 J

Thus, the work done on the cylinder against the external pressure is 408.34 J.

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An object is released from rest on a planet that has no atmosphere. The object falls freely for 3 m in the first second. The magnitude of acceleration due to gravity is g =  6 m/s²

if we ignore air friction, height h an object falls under a gravity g is calculated through:

h =h₀ + v₀*t - 1/2*g*t²

where,

t= time to reach a height h

v₀ = initial vertical velocity of the object =0 m/s( since is released from the rest)

g = gravity

h₀ = initial height = 3m

if object starts at height h₀ = 3 m then it finishes at height h= 0 m when it falls 3 meters.

then since v₀=0 m/s  :

h =h₀  - 1/2*g*t²

replacing values

0 = 3 m - 1/2*g*(1 s)²

g= 2*( 3m - 0m)/(1 s)² = 6m/s²

g =  6 m/s²

The acceleration of a body in free fall under the influence of the earth's gravity expressed as the rate of increase of velocity per unit of time and assigned the standard value of 980.665 centimeters per second also called g.

The acceleration of an object changes with the altitude. The change in the gravitational acceleration with distance from the center of Earth follows an inverse-square law. This means that the gravitational acceleration is inversely proportional to the square of the distance from the center of Earth. As distance is doubled, the gravitational acceleration decreases by a factor of 4. As distance is tripled, the gravitational acceleration decreases by a factor of 9, and so on.

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The sequence is E,B,F,C. for the scenarios total internal reflection possible .

What is total internal reflection?

Total internal reflection is an optical phenomena when waves arriving at the interface between two media entirely reflect back into the first medium instead of being refracted into the second. total internal reflection, in physics, is defined as complete reflection of a ray of light within a medium like  as water or glass from the surrounding surface's back into the medium. The phenomenon occurs if the angle of incidence is higher than a certain limiting angle, known as  the critical angle

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The calculated speed is 8 m/s.

The region below the curve in the acceleration vs. time graph can be used to calculate velocity. Similar to the integral in equation, this (1). The area underneath the graph in the first four seconds in this example is just a rectangle with a base of t1=2s and a height of a1=4m/s2.

Therefore, the area is v24=a1

t24=4m/s2

2m/s=8m/s.

Since the particle begins at rest and is not accelerated for the first second, its velocity after 4 seconds is

v (4s) =v24

=8 m/s.

The complete question is- Consider the acceleration of a particle along a straight line with an initial position of 0 m and an initial velocity of 0 m/s.

a. What is the velocity at 4 s?

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The change in the internal energy of 1 mol of the gas at constant volume is 100J

The energy contained within a thermodynamic system is referred to as its internal energy. Internal energy is constant in an isolated system. It is the energy required to build or prepare the system in the internal state that it is in at the time.

The kinetic energy of individual particles within the system is included, but not the kinetic energy of motion of the system as a whole. It records the system's energy gains and losses that result from modifications to its internal state. It is impossible to directly quantify internal energy. It is determined by comparing the difference to a conventional state-defined reference zero.

We know that, change in internal energy at constant volume is given by

[tex]dE_{int}[/tex] = n × Cv × dT

Here, n = no. of moles

       Cv = molar heat capacity

       dT = temperature difference

Applying the equation on the question, we get

    [tex]dE_{int}[/tex] = 1 mol × 12.47 J/mol k × 8k

              = 99.76 J ≈ 100J

Hence, the change in internal energy during the process is 100 J

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The results of the calculation are;

1) The acceleration is 0.2 m/s^2

2) The acceleration is 20 m/s^2

3) Can not be solved as the parameters are not complete

4) Has a final velocity of  114.7 m/s

5) The height is  4.9 m

6) The total time taken is 0.4 s

7) The final velocity is 190 m/s

The term acceleration is defined as the rate of change of the velocity with time. We shall now look at the solution to each of the problems.

1) Using;

v = u + at

v = final velocity

u = initial velocity

a = acceleration

t = time

a = v - u/t = 6 - 4/10

a = 0.2 m/s^2

2) v^2 = u^2 + 2as

s = distance

u = initial velocity

a = acceleration

v =final velocity

Given that it started from rest u = 0 m/s

v^2 = 2as

a = v^2/2s

a = (20)^2/ 2 * 10

a = 20 m/s^2

3)   This problem can not be solved because the initial velocity is missing

4) v = u + gt

v = 100 + (9.8 * 1.5)

v = 114.7 m/s

5) h = ut + 1/2 gt^2

Since it was dropped from a height u = 0 m/s

h = 1/2 gt^2

h = 0.5 * 9.8 * (1)^2

h = 4.9 m

6) v = u + gt

At the maximum height v = 0 m/s

u = gt

t = u /g

t = 2/9.8

t = 0.2 s

To go up and come back 2(0.2) = 0.4 s

7) s = ut + 1/2 at^2

400 = (10 * 4) + 0.5 * (4)^2 * a

400 = 40 + 8a

400 - 40/8 = a

a = 45 m/s^2

Using;

v = u + at

v = 10 + 45 * 4

v = 190 m/s

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Planets can migrate inward or outward from the orbits on which they originally formed.

The best-known theory regarding how the solar system formed is the nebular hypothesis. According to this, the solar system was mostly composed of vast nebulae, which are clouds of gas and dust. Due to the ionised gases' powerful electromagnetic forces, the nebula gradually began to compress and begin producing masses that gravitationally attracted one another. According to the Nebular theory, the solar system's sun is a protostar produced by the core mass that was subjected to the greatest forces. According to nebular theory, the planets in the solar system rotated as a result of the nebula's continuous rotation.

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Answer:

Character: Example 2

Plot: Example 3

Theme: Example 1

Explanation:

A character is a person that is apart of a story, the plot is the events and the "flow" of the story, and the theme is a lesson that can be taken in real life from the story.

Answer:

Character- Mickey mouse, a reporter, Katniss, Romeo

Theme- An act of kindness can affect others in unexpected ways

Plot- A boy wakes up in a strange world, leaves his belongings, battles monsters, and then wakes up to relize it was all a bad dream. He appreciation for his family more when his nightmare ends

Explanation:

By using uniform motion, in 19.49 second the player will catch his opponent

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

v = 2 m/s

t = 1.4 s

vo = 0 m/s

a = 0.22 m/s²

Find the distance between players

so = v . t

so = 2 . 1.4

so = 2.8 m

The player will catch his opponent with the same distance, hence

S = S

so + v . tchase = vo . tchase + 1/2 . a . tchase²

2.8 + 2.tchase = 0 . tchase + 1/2 . 0.22 . tchase²

0.11 tchase² - 2 tchase - 2.8 = 0

a = 0.11

b = -2

c = -2.8

the square root is

x1 = (-b + √(b² - 4ac) ) / 2a

x1 = (-(-2) + √((-2)² - 4 . 0.11 . (-2.8)) ) / (2 . 0.11)

x1 = 19.49 second

x2 = (-b - √(b² - 4ac) ) / 2a

x2 = (-(-2) - √((-2)² - 4 . 0.11 . (-2.8)) ) / (2 . 0.11)

x2 = -1.31 second

the possible root is 19.49 second

Hence, in 19.49 second the player will catch his opponent

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some options for you :) hope this helps!

The two possible angles to where this water from the the hose travels at are 24.9° (below the horizontal) and 85.2° (above the horizontal)

Equations of motion in physics are the kind of equations that explain how any physical system behaves in terms of how its motion changes over time.

This kind of behavior of a physical system is described in more detail by the equations of motion as a collection of mathematical functions expressed in terms of dynamic variables.

The three equations of motion can be stated as follows:

v = u + at.

v² = u² + 2as.

s = ut + ½at²

So, from this we already have the idea about,

V = U + at

35 = 0 + 80 cosθ t

also,

S = Ut + 1/2a t^2

-20 = -80 sinθt + 1/2 (-32.2)t^2

Thus, we have

20 (cosθ)^2 = 17.5 sin2θ + 3.0816

solving for theta, we have

θ1 = 24.9° (below the horizontal)

θ2 = 85.2° (above the horizontal)

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The mass of gold with the dimensions 10 cm, 5 cm, & 20 cm will be  19.3 kg.

What is volume ?

The amount of cubic space a three-dimensional object takes up (measured in inches, quarts, or centimeters): square footage. The volume that a certain amount of a substance fills.

Although the dimensions were given in centimeters, you require the volume in cubic meters.

The dimensions must also be given in meters because the units must match. The conversion is to multiply the centimeters by 100 to obtain the volume in cubic meters.

0.10 x 0.05 x 0.20 = 0.001 m^3

To determine the mass of the gold block, multiply by the density.

0.001 x 19,300 = 19.3 kg

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Question:

The density of gold is 19300 m^3/kg. What will be the mass of gold with the dimensions 10 cm, 5 cm, & 20 cm?

Answer:

Shaking hands with the opponent at the end of the game.

Explanation:

Hope this helps.

In SI, prefixes are used with the names of the base unit to indicate the multiple of 10 that is being used with the base unit

Base units are units used for various measurements such as length, time, mass, temperature etc. For example the SI base unit of length is meter, SI base unit of time is second, SI base unit of mass is gram and SI base unit of temperature is kelvin.

Prefixes such as kilo, mega, giga, deci, centi, milli, micro, nano etc are used with base units mentioned above to indicate multiples and submultiples of 10. The multiples of 10 are used to mention larger measurements and the submultiples of 10 are used to mention smaller measurements. For example, the total unit will be called as millimeter, kilo seconds etc.

Therefore, in SI, prefixes are used with the names of the base unit to indicate the multiple of 10 that is being used with the base unit.

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The temperature of the star will be equal to 4630000 K.

Temperature is defined as the physical parameter used to differentiate hotness and coldness. The temperature is calculated in kelvin, Fahrenheit, or degree Celcius.

According to Wien's displacement law, a star's temperature and peak wavelength are related:

T = ( b / λ )

Where,

T is the absolute temperature at the star's surface

b = 2.898 x 10 ⁻³ is Wien's displacement constant

λ = 625 x 10⁻⁹ is the peak wavelength

Substituting the values in the equation.

T = ( b / λ )

T = ( 2.898 x 10 ⁻³ ) / (  625 x 10⁻⁹ )

T = 4630000 K

Therefore, the temperature of the star will be equal to 4630000 K.

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Answer:

-2

Explanation:

Answer:

Explanation

hey b

Answer: 11.2

Explanation:

It requires 708.75 J of labor to extend the spring 4.5m beyond its normal length if a force of 21n stretches it by 0.3m.

We know that

F = k × x

We are given

F = 21 N

x = 0.3

21 = k × 0.3

k = 70 N/m

Work = [tex]\int\limits^4_0 {70x} \, dx[/tex]

[tex]= 70 \frac{x^{1+1} }{1+1}[/tex]

[tex]=35x^{2}[/tex]

When we plug in boundaries, we get,

= 708.75 - 0

Work = 708.75 J

The spring's duration with none linked mass is its natural length. We assume the spring abides through Hooke's rule, which states that if the spring's natural duration is expanded by means of an quantity L, it's going to exert a force Fs = kΔL, wherein ok is a wonderful fee referred to as the spring consistent.

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As the planets orbit the sun, they are never far from the ecliptic on the celestial sphere.

Which planets are never seen to some distance from the sun?

As regarded from the Earth, two of the planets (Mercury and Venus) are in no way a long way from the sun. Venus can get approximately forty eight tiers from the solar, while Mercury can simplest control a 27.5 levels separation from the solar

Why does the orbit of Mars never takes it far from the ecliptic?

this is due to the fact the trails of each worlds are tilted a piece. Mars's orbit is tilted by about two ranges. that means it is able to wander two levels away from the ecliptic.

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Complete question

If the maximum acceleration that is tolerable for passengers in a subway train is 1.34m/s

2

 and subway stations are located 806m apart, what is the maximum speed a subway train can attain between stations?

From rest, the train is assumed to accelerate at a rate [tex](v_{0} =0)[/tex] and [tex](x_{0}=0)[/tex] of [tex]1 = 1.34m/s^{2}[/tex] until it reaches the halfway point, then decelerates at a rate  [tex]2 = 1.34 m/s^{2}[/tex] until it stops [tex](v_{2}=0)[/tex] at the following station. The distance between the two stations (l = 806m).

maximum speed refers back to the fastest rate of speed someone can reap. while athletes regulate the significance (how speedy they may be moving) or path (or each) in their movement, or both, their acceleration adjustments as properly when you consider that acceleration is related to pace, which has both a importance and a path related with it.

Given data:

The midpoint's velocity [tex]V_{1}[/tex] is experienced at:

[tex]x = \frac{1}{2} = \frac{806}{2} =403 m[/tex]

Then,

⇒ [tex]\mathrm{V}_{1}^{2}=\mathrm{V}_{0}^{0}+2a_{1} x[/tex]

⇒ [tex]v_{1} =\sqrt{0+2*1.34*403}m/s[/tex]

= 32.86 m/s

Thus, the maximum speed attained is 32.86 m/s.

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Plastic insulation does not necessarily decrease the heat transfer from the wire. Although it is insulated to keep it safe, shock free and protect the wire from high temperature.

Plastic is a poor conductor of heat. The reason is it does not have free electrons in its conduction band which makes it a perfect conductor.

Since Plastic is good insulator, they do not allow the flow of heat through them. When an electric wire is insulated with plastic it does not let the heat reach the electric wire.

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The plastic insulation on the electrical wire will not decrease the heat transfer from the wire.

Plastic insulation cannot always reduce heat transmission from the wire. Despite the fact that it is protected to make it safe, shock-free, and to shield the wire from extreme temperatures.

Plastic is a bad heat conductor. The reason for this is that it has no flow of electrons inside its conduction band, making it an excellent conductor.

Because plastic is a poor insulator, it does not enable heat to pass through it. Whenever an electric wire is protected with plastic, it prevents heat from reaching the wire.

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When the baseball is thrown vertically upwards into the air and returns to the starting point,

The average acceleration is not zero

The Initial and final speed are equal

The initial and final velocities are equal

The average speed is not zero

The total displacement is zero

The average velocity is zero.

Speed is the temporal speed at which an object moves along a path while velocity is the speed and direction of movement of an object. The mathematical calculation of speed is relatively simple, calculating the average speed of an object by dividing the distance traveled by the time it takes the object to travel the distance. Velocity, on the other hand, is mathematically more complicated and can be calculated in different ways, depending on the available information about the movement of the object. In its simplest form, the average velocity is calculated by dividing the change in position by the change over time.

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