What is most likely the author’s motive for writing the article? to get the reader to buy digital products to get the reader to support the conversion from analog to digital to get the reader to raise money for digital research to get the reader to understand the two types of signals

Answer:

Forces can affect an object.

Balanced forces allow an object to continue moving at a constant motion (law of inertia).

Unbalanced forces cause a change in motion.

Answer:

Because of my physics teacher I would put this entire explanation below if i were u

Explanation:

Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving.

Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity. So forces cause acceleration.

Answer:

=-21.43

Explanation:

::::::::::::::::::

We have that the focal length is

[tex]f=19.058[/tex]

From the Question we are told that

image distance [tex]v=12.9[/tex]

object distance [tex]u=32.4[/tex]

Generally the equation for focal length   is mathematically given as

[tex]\frac{1}{f}=\frac{1}{v}-\frac{1}{u}\\\\\frac{1}{f}=\frac{1}{12}-\frac{1}{32.4}[/tex]

[tex]f=19.058[/tex]

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Answer:

the uncertainty in the distance measurement is 0.5148

Explanation:

Given the data in the question;

uncertainty in locating the center of the magnet is estimated to be 0.25 cm,

uncertainty in locating the position of the sensor in the phone is estimated to be 0.45 cm,

Using quadrature method, uncertainty in the distance measurement = ?

We know that;

Using  quadrature method, Combined Uncertainty calculated by;

U[tex]_c[/tex] = √( U₁² + U₂² + ........... )

where U₁ is uncertainty in first measurement and U₂ is uncertainty in second measurement, et cetera.

now we substitute;

U[tex]_c[/tex] = √( U₁² + U₂² )

U[tex]_c[/tex] = √( (0.25)² + (0.45)² )

U[tex]_c[/tex] = √( 0.0625 + 0.2025 )

U[tex]_c[/tex] = √( 0.265 )

U[tex]_c[/tex] = 0.5148

Therefore, the uncertainty in the distance measurement is 0.5148

Answer:

A. Transformer

Explanation:

it’s correct

Answer:

you Subtract

Explanation:

A = 6

B = 6

C = 0

D = 5

9-3= 6

13-7=6

11-11=0

6-1=5

Simple hope it helps

Two resistors of resistance 19 ohm each are connected in series.

In series combination, equivalent resistance = 19+19 = 38 ohm

Potential difference = 10 V

V/I = R

I ( current ) = V/R = 10 V / 38 ohm = 0.26 ampere

Answer:

86.8N is the correct answer

Answer:

I think sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. If you are sitting in a space ship and another space ship explodes, you would hear nothing.

Explanation:

Answer:

Rain came along with lower temps

Explanation:

There was no rain on the warmer days

There were more clouds as the week went on

and the temp decreased during the week so rain came with lower temps is the only one that can be correct

Answer:

A system of two co-axial cylindersof different diameters which rotate together is called wheel and axle example; the door knob , knob of the tap ,screw driver,water tap

Answer:

B

Explanation: Given that an elevator moving down passes its neighbor, an elevator moving up. Their speed relative to one another is 8 m/s. What is the velocity of each elevator relative to someone standing on the first floor? Assume that the elevators are traveling at the same speed, and that the upward direction is positive.

O Both elevators are moving at 8 m/s.

y Falling Objects

O One elevator is moving at 4 m/s; the other elevator is moving at -4 m/s.

O Both elevators are moving at 4 m/s.

tive Velocity

O One elevator is moving at 8 m/s; the other elevator is moving at -8 m/s.

Solution.

Since the upward direction is positive, the downward direction will be negative.

For their speed relative to one another to be 8 m/s, the individual velocity will be:

4 - ( - 4 ) = 8

Therefore, the correct answer is:

One elevator is moving at 4 m/s; the other elevator is moving at -4 m/s

Which is option B

Because the negative sign multiply by negative sign will give positive.

That is,

4 + 4 = 8

Answer:962 hz

Explanation: got it right on acellus

The frequency of the siren when the cyclist is stationary will be 963 Hz.

The frequency of a wave is the number of cycles per second.

FRom the doppler effect,

f =f'[ (V+Vs/V-Vo) ]

Here, doppler shifted frequency f' = 894 Hz, Source is stationary, Vs =0. Velocity of observer Vo = 24.5m/s and velocity of sound wave V = 343m/s

Substitute the value into the expression , we get

f = 894 x [(343/343 - 24.5)}

f = 963 Hz

Thus, the frequency of the siren when the cyclist is stationary is 963 Hz.

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Magnetism is the result of the "spin" of the electron and most of these cancel each other out in larger bodies thus most things not being magnetic.

Answer: d

Explanation:

Answer: The yellow light with a frequency equal to 5.21 x 1014 Hz will have a wavelength of E) 576 nm

Answer:

1)   F = 8.789 10² N, 2)   F = 1.5 10⁴ N

Explanation:

We can solve this exercise using Coulomb's law

         F =[tex]k \frac{q_1q_2}{r^2}[/tex]

Knowing that charges of the same sign repel

let's apply this equation to our case

1) the charges are q = - 0.0025 C and the distance between them r = 8 m

       we calculate

           F = 9 10⁹ 0.0025 0.0025 /8²

           F = 8.789 10² N

as the two charges are of the same sign the force is repulsive

2) q₁ = -0.004C and q₂ = -0.003 C with a distance of r = 3.0 m

    we calculate

             F = 9 10⁹ 0.004 0.003 / 3²

             F = 1.5 10⁴ N

Answer:

The aswers is C

Explanation:

Answer:

3. Ice.

4. Stay the same size but with different internal pressure.

5. Stars in the galaxy

Explanation:

Hope it helped!!

Answer:

It would be false

Explanation:

Lead is more reactive if  thats  what you mean

Answer:

1.648 m/s

Explanation:

1 revolution equals 2pi radians.

Calculate the angular velocity by taking 2pi x v, then divide by 60 seconds.

To convert this to m/s, simply take this answer and multiply it by 0.305m (a.k.a. the radius of the circle).

1 revolution is equals 2pi radians. The drier will move 1.648 m/s.

Thus, v = 51.6 rev/ min.

1 revolution = 2 pi radians.

Angular velocity = 2 pi (v)/ 60

                           = 2 *3.14 * 51.6/ 60

                            = 5.404 rad/ seconds.

r = 30.5 cm = 0.305 m

v= ( 5.40) ( 0.305)

v= 1.648 m/s.

Thus, 1 revolution is equals 2pi radians. The drier will move 1.648 m/s.

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Answer:

The answer is "12388.17"

Explanation:

[tex]l = 2.1 cm = 2.1 \times 10^{-2}\ m\\\\k = 1.00059\\\\\eta = \sqrt{k}= \sqrt{1.00059}\\\\\lambda = 663 nm = 663 \times 10^{-9}\ m[/tex]

Users now know that perhaps the number of fingers the shift is provided when a path difference [tex]\Delta d[/tex] are inserts between both the two arms  

[tex]N = \frac{\Delta d}{\lambda}[/tex]

The optical pull-up in the arm is initially given by

[tex]d = 2\eta l[/tex]

Its new length of the different sense as the reflection coefficient adjustments between [tex]\eta[/tex] (air) and 1 so if we evacuate air from of the arm (vacuum).

The new length of a path is therefore

 [tex]d'' = 2l[/tex]

Therefore, the different path  

[tex]\Delta d=d-d''=2l(\eta -1)[/tex]

So, The fringe shifts number are

[tex]N= \frac{2l(\eta -1)}{\lambda}[/tex]

    [tex]= \frac{2 \times 2.1 \times 10^{-2} (\sqrt{1.00059}-1)}{663 \times 10^{-9}}\\\\=12388.17[/tex]

Answer:

dT(t)/dt = k[T5 - T(t)]

Explanation:

Since T(t) represents the temperature of the object and T5 represents the temperature of the surroundings, according to Newton's law of cooling, the rate at which an object's temperature changes is directly proportional to the difference in temperature between the object and the surrounding medium, that is dT(t)/dt ∝ T5 - T(t)

Introducing the constant of proportionality

dT(t)/dt = k[T5 - T(t)]

which is the desired differential equation

Answer:

dT/dt = k[T5 - T]

Explanation:

DT/dt represents rate of change in temperature for Celsius degrees per hour. Its proportional to the difference in temperature between the object and the Surrounding medium. This means either dT/Dt =k (T-TS) or dT/dt=k(TS-T) with k being some positive constant of proportionality which depends on the object.

We can see that dT/dt = k(T-T5) has temperature increasing when the temperature of the object T is greater than the surrounding medium (T5).

The equation dT/dt=k(T5-T) has the temperature increasing when the object (T) is less than the temperature of the surrounding medium. Therefore the differential equation best describing the rate of change in temperature of the object is dT/dt=k(T5-T) for some positive constant of proportionality k.

345k

Because the formula for our Fahrenheit is Kevin = 5 * (°Fahrenheit + 459.67)

9.

Answer:

if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value. If the charges come 10 times closer, the size of the force increases by a factor of 100. The size of the force is proportional to the value of each charge.

When charges are 3 centimeters apart if the distance between the charges is doubled, the force between them is reduced by a factor of four.

Coulomb's law can be stated as the product of the charges and the square of the distance between them determine the force of attraction or repulsion acting in a straight line between two electric charges.

F= k Q₁Q₂/r²

Where F is the force between two charges

As given in the problem, the two charges are 3 centimeters apart, then we have to find out what will happen to this force if the distance between the charges is doubled.

As per Coulomb's law, the force is inversely proportional to the square of the distance between charges.

Thus, the force between them is reduced by a factor of four.

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Answer:

A. The bus has more kinetic energy than the car.

Explanation:

We know that

Kinetic energy is the energy amount possessed from the body as in the motion

Also, the following formula should be used to determine the kinetic energy

Kinetic energy = 1 ÷ 2mv²

Here m represents the mass of the body  

and v represents the velocity of the body.

Therefore it should be based on the mass & velocity of the body  

In the case when the passenger bus have more kinetic energy as compared to the car so this is because of the the big mass  

Therefore, the first option is correct