A satellite will travel indefinitely in a circular orbit around the earth if the normal component of its acceleration is equal to 2 gRr ( /), where 2 g =9.81 m/s , R = radius of the earth = 6370 km, and r = distance from the center of the earth to the satellite. Assuming that the orbit of the moon is a circle of radius 3 384 10 km, ´ determine the speed of the moon relative to the earth.

Answer:

3.04 m ???

Explanation:

The wavelength of the signal from  KPhET 98.7 radio station is 3.05 meter.

EM waves are another name for electromagnetic waves. When an electric field interacts with a magnetic field, electromagnetic waves are created. These electromagnetic waves make up electromagnetic radiations.

It is also possible to say that electromagnetic waves are made up of magnetic and electric fields that are oscillating. The basic equations of electrodynamics, Maxwell's equations, have an answer in electromagnetic waves.

As radio wave is electromagnetic wave, the speed of radio wave is 3.0×10⁸ m/s.

Given frequency of KPhET  is 9.87 x10⁷ Hz.

Hence, the wavelength of the signal from this radio station is = ( velocity ÷ frequency)

= 3.0×10⁸ m/s ÷  9.87 x10⁷ Hz.

= 3.05 meter.

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Answer: IT IS C TRUST ME DID IT

Explanation: OK BYE GOOD LUCK

Answer:

Law of nature, in the philosophy of science, a stated regularity in the relations or order of phenomena in the world that holds, under a stipulated set of conditions, either universally or in a stated proportion of instances. ...

It is not killing plants the same thing as this...

Example:natural law in our society is that it is wrong for one person to kill another person.

Answer:

The work done by the electric force as one of the charges moves to an empty corner is:

[tex]W=0.129\: J[/tex]  

Explanation:

The electric force between these points charges are:

[tex]F=k\frac{q_{1}q_{2}}{r^{2}}[/tex] (1)

Where:

k is the coulomb constant ([tex]9*10^{9} Nm^{2}C^{-2}[/tex])

q(1) the first charge

q(2) the second charge

r is the distance between them

The distance r is the distance of the diagonal of the square.

[tex]r=\sqrt{0.395^{2}+0.395^{2}}[/tex]

[tex]r=0.56\: m[/tex]

Then, using the equation (1) the electric force will be:

[tex]F=9*10^{9}\frac{16*10^{-12}}{0.56^{2}}[/tex]  

[tex]\vec{F}=0.46\: N \vec{r}[/tex]

If we want to find the work done by the electric force we need to use the component of the force in the x or y direction because is the direction of the empty corner.

[tex]F_{x}=Fcos(45)[/tex]

[tex]W=F_{x}d[/tex]

[tex]W=0.46cos(45)0.395[/tex]

[tex]W=0.129\: J[/tex]  

I hope it helps you!    

Answer:

P = √1.66 * 10^-19 days^2miles^-3d^3

Explanation:

The mathematical statement of Kepler's third law is;

P^2 α d^3

Where;

P = Period of the body orbiting the sun

d = its average distance from the sun

Introducing a constant of proportionality K, known as Kepler's constant then;

P^2 = Kd^3

K = P^2/d^3

P=365 days

d = 93,000,000 miles

K = (365)^2/(93,000,000)^3

K=1.66 * 10^-19 days^2miles^-3

P = √1.66 * 10^-19 days^2miles^-3d^3

Answer:

19,200j

Explanation:

formular W=f×d

a) W=240N×20m

= 4,800j

b) W=200N×20m

=4000j

C) Td= 4800×4000\20×50

td= 19,200,000/1000

td= 19,200j

sorry if am wrong ☹️

Answer:

Another term used to describe a wave is frequency. Since waves are moving, we define frequency as the number of waves that pass a given point in a specified unit of time. The unit commonly used is Hertz which is the number of wave cycles pass a point in one second. So one cycle per second equals one Hertz

Option B

kskmsnsnsmjsjsn

Answer:

C. The potential energy of the particles increases as the intermolecular forces are overcome

Explanation:

Answer:

Explanation:

Please don't comment in this question's comment box

Answer:

constant

I hope im right !!!

Answer:

i think the 2nd one

the first=0 b/c it's initial velocity and final ones are equal the third one is constant

Answer:

Explanation:

We shall express each displacement vectorially , i for each unit displacement towards east , j for northward displacement and k for vertical displacement .

14 m due west = - 14 i

22.0 m upward in the elevator = 22 k

12 m north = 12 j

6.00 m east = 6 i

Total displacement = - 14 i + 22 k + 12 j + 6 i

D = - 8 i + 12 j + 22 k

magnitude = √ ( 8² + 12² + 22² )

= √ ( 64 + 144 + 484 )

= √ 692

= 26.3 m

Net displacement from starting point = 26.3 m .

Answer:

The mass of the feather would be 0.0075 kg.

Explanation:

If the feather were to be on earth, it would have experienced the gravitational pull of the earth downwards. So that from Newton's second law of motion,

F = mg

where f is the force on the object, m is the mass of the object and g is the acceleration due to gravity of the earth.

But, F = 0.075 N, g = 10 m/[tex]s^{2}[/tex].

So that,

0.075 = m x 10

m = [tex]\frac{0.075}{10}[/tex]

   = 0.0075 kg

The mass of the feather would be 0.0075 kg.

Answer:

B. 2.5

not 2.5m because IMA is unitless.

The identical mechanical advantage of the inclined plane is 2.5.

The concept of work, which asserts that work produced through a basic machine (the lever) is equal to the work input, forms the basis for the mechanical advantage of the inclined plane. The length of the slope divided by the height of the inclined plane represents the inclined plane's mechanical advantage.

Given parameters:

Length of the inclined plane; d = 5 m.

Height of the inclined plane; h = 2 m.

So, identical mechanical advantage (IMA) of the inclined plane is = Length of the inclined plane ÷ Height of the inclined plane

= 5 m/2 m

= 2.5.

Hence, the  identical mechanical advantage (IMA) of an inclined plane that is 5m long and 2m high is 2.5.

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Answer:

  I = 0.160 A

Explanation:

For this exercise we must calculate the power supplied to the motor

power is the work done between the time interval

      P = W / t

      W = F x

      P = [tex]\frac{F \ x}{t}[/tex]

the force is

       F = ma

let's use kinematics

       v = v₀ + a t

as part of rest v₀ = 0

       a = v / t

       a = 1.81 / 7.15

       a = 0.253 m / s

therefore the applied force is

       F = m a

       F = 0.836 0.253

       F = 0.212 N

to calculate the work, let's find the distance traveled

       x = v₀ t + ½ a t²

       x = 0+ ½ a t²

       x = ½ 0.253 7.15²

       x = 6.457 m

therefore The power developed in this movement by the motor

       P = 0.212  6.457/7.15

       P = 0.19145 W

Let's use a direct proportion rule. If the for a supplied power of Ps = 1W to use 0.471W, what power is united when the effective is 0.19145 W

       P_s = 0.19145 W (0.471W/1W)

       P_s = 0.4786 W

       P_s = 0.479 W

how electrical power is

       P = I V

we assume that the batteries are not discharged during the experiment

        I = P / V

electrical power equals supplied power

        P = Ps

calulate

        I = 0.479 / 3.00

        I = 0.1597 A

        I = 0.160 A

The ratio of power delivered to the electric potential is equal to the average current flow.

The required magnitude of the average current supplied to the car's motor is 0.064 A.

The amount of electric charges passing through a specific point in a certain period of time is known as an average current.

Given data -

The mass of the toy car is, m = 0.836 kg.

The combined electric potential of two cells is, V' = 3.00 V.

The energy conversion efficiency is, [tex]\eta =47.1 \%[/tex].

The time interval is, t = 7.15 s.

The final speed of car is, v = 1.81 m/s.

The power produced by the two cell is,

P = W / t

P = (F × d)/t

Here,

F is the force exerted on the toy car.

d is the distance traveled by car in the given time interval.

The magnitude of the force is given as,

F = ma

here, a is the magnitude of acceleration.

Now, using the first kinematic equation of motion as,

v = v₀ + a t

As part of rest v₀ = 0

a = v / t

a = 1.81 / 7.15

a = 0.253 m / s²

Therefore the applied force is

F = m a

F = 0.836 × 0.253

F = 0.212 N

To calculate the work, let's find the distance traveled from the second kinematic equation of motion,

d = v₀ t + ½ at²

d = 0+ ½ a t²

d = ½ 0.253 7.15²

d = 6.457 m

Finally, the power developed in this movement by the motor is,

P = (0.212 × 6.457)/7.15

P = 0.19145 W

Now, the expression for the power developed is also given as,

P = V × I

Here,

I is the magnitude of the average current.

Solving as,

I = P / V

I = 0.19145/3.00

I = 0.064 A

Thus, we can conclude that the required magnitude of the average current supplied to the car's motor is 0.064 A.

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Answer:

[tex] \frac{{v}^{2} g}{2 } [/tex]

Answer:

1. This is a speed graph.

2. The slope represents how much the item/ thing is moving at how much distance it moved and the minutes it takes it too move how much distance, but the slope is representing the decrease and increase of it.

3. Increasing, kind of rapidly going up since the slope is rising not falling.

Answer:

We can easily find out the beginning point of the line by using dot representation. When it comes to position vector, it expresses the exact position of certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end which is fixed to its body.

Position vectors are used to determine the starting position of a line with reference to the origin or starting point of  the coordinate system

Position vectors start at the origin and terminate at any arbitrary point.

In terms of position of a line, position vectors depict the exact position of a line from the starting point of the coordinate system.

In terms of direction of the line, the direction of the position vector points from the starting point of  the coordinate system towards the given point.

Thus, we can conclude that position vectors are used to determine the starting position of a line with reference to the origin or starting point of  the coordinate system.

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Answer:

Fibrous refractory composite insulation (FRCI) tiles

Answer:

Umm... FRCI tiles can't be correct; they're made of 99.9% pure silica fibers, which are basically porcelain. Sounds like the answer is aluminium.

Explanation:

I am not well-versed on this; I looked it up. But I hope you get it right!

Answer:

Explanation:

From the given information.

The charge density of the cylinder can be computed as:

[tex]\rho = \dfrac{Q_t}{V_t}[/tex]

where:

[tex]Q_t[/tex] = total charge on cylinder

[tex]\rho[/tex] = density of the cylinder

[tex]V_t =[/tex] net volume on cylinder

Considering the charge enclosed by the Gaussian surface; we have:

Q = ρV

Now, determining the volume of the cylinder at a distance r from the axis of the cylinder as follows:

[tex]\int Edsn = \dfrac{q}{\varepsilon_o}[/tex]

Here;

[tex]\hat E \ \ and \ \ \hat n[/tex] are in the same direction;

If we replace [tex]\int Edsn[/tex] with [tex]E ( 2 \pi rl)[/tex] and q with [tex]\rho \pi r^2 l[/tex]; Then:

[tex]E ( 2 \pi rl ) = \dfrac{\rho \pi r^2 l}{\varepsilon _o}[/tex]

By rearrangement;

[tex]E = \dfrac{\rho \pi r^2 l}{ ( 2 \pi rl ) \varepsilon _o}[/tex]

[tex]\mathbf{E = \dfrac{\rho r}{ 2 \varepsilon _o}}[/tex]

(b)

Using the same formula:

[tex]\int Edsn = \dfrac{q}{\varepsilon_o}[/tex]

where;

[tex]\hat E \ \ and \ \ \hat n[/tex] are in the same direction;

If we replace [tex]\int Edsn[/tex] with [tex]E ( 2 \pi rl)[/tex] and [tex]Q_t[/tex] with q;

Then:

[tex]E ( 2 \pi rl ) = \dfrac{Q_t}{\varepsilon _o}[/tex]

[tex]E = \dfrac{Q_t}{( 2 \pi R l ) \varepsilon _o}[/tex]

Replacing [tex]\lambda[/tex] for [tex]\dfrac{Q_t}{l}[/tex].

From above [tex]\lambda[/tex] = the charge per unit length

∴

[tex]\mathbf{E = \dfrac{\lambda}{ 2 \pi R \varepsilon _o}}[/tex]

Answer:

6.00 x 10⁻⁸N

Explanation:

Given parameters:

Mass of each dump trucks  = 1500kg

Distance between them  = 50m

Unknown:

New gravitational force between them = ?

Solution:

From Newton's law of universal gravitation,

        F = [tex]\frac{G m1 m2}{r^{2} }[/tex]  

F is the gravitational force

G is the universal gravitation constant

m is the mass

r is the distance

           F  = [tex]\frac{6.67 x 10^{-11} x 1500 x 1500}{50^{2} }[/tex]    = 6.00 x 10⁻⁸N

Answer:

I don't know, but my class ends in like 30 mins so im superrrr happy. Please shut up thought because no one cares. Just kidding that was a joke it helps your math knowledge go up, ha ha. Do you understand what im saying?

Explanation:

Answer:

Explanation:

Given parameters:

Voltage  = 12V

Quantity of charge  = 4C

Unknown:

Potential energy  = ?

Solution:

Within this circuit, the value of the potential energy can be found using the expression below:

   Potential energy  = [tex]\frac{1}{2}[/tex] c v²  

c is the quantity of charge

v is the voltage

 Potential energy   =  [tex]\frac{1}{2}[/tex] x 4 x 12²  = 288J

Answer: 1.5 N/C

Explanation:

The equation is derived from Coulomb's Law, but is not exactly Coulomb's Law:

F = qE

q is the test charge

E is the electrical field produced by the source charge

F is the force in Newtons

In this problem, we were given the value of the test charge q, and the force acting on it due to the electric field from the source charge.

E = F/q

E = 6.5N/4.3C

E = 1.5 N/C

Answer:

Workdone = 0.67 Joules

Explanation:

Given the following data;

Workdone = 6J

Extension = 43 - 28 = 15cm to meters = 15/100 = 0.15m

The workdone to stretch a string is given by the formula;

Workdone = ½ke²

Where;

k is the constant of elasticity.

e is the extension of the string.

We would solve for string constant, k;

6 = ½*k*0.15²

6 = ½*k*0.0225

Cross-multiplying, we have;

12 = 0.0225k

k = 12/0.0225

k = 533.33N/m

a. To find the workdone when e = 33, 38.

Extension = 38 - 33 = 5 to meters = 5/100 = 0.05m

Workdone = ½*533.33*0.05²

Workdone = 266.67 * 0.0025

Workdone = 0.67 Joules

Therefore, the amount of work (in J) needed to stretch the spring from 33 cm to 38 cm is 0.67.

Answer:

94,5 x 3,17 = 299,565 m/s

Explanation:

To find the speed of waves (V), you just need to multiply wavelength with frequency. That's all.

The speed of the given electromagnetic waves is equal to 3 × 10⁸ m/s.

The frequency can be described as the number of oscillations of a wave in 1 second. The S.I. units of the frequency can be represented as per second or hertz.

The wavelength can be described as the distance between the two points in phase on the wave w.r.t. each other. The separation between two crests or two troughs on a wave is known as wavelength.

The relation between the wavelength (λ) of the wave, frequency (ν), and speed of the wave (V) can be written as:

V = νλ

Given, the frequency of the wave, ν = 94.5 MHz = 94.5 ×10⁶ s⁻¹

The wavelength of the waves, λ  = 3.17 m

The speed of the waves can determine from the above-mentioned relationship:

V = λν = 3.17 × 94.5 ×10⁶ =  3 × 10⁸ m/s

Therefore, the speed of the wave is equal to 3 × 10⁸ m.

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Answer:

Δx = 23.0 m

Explanation:

       [tex]x_{2} = v_{2} * t = 1.17m/s * 14.5 s = 17.0 m (1)[/tex]

       [tex]x_{1} = v_{1} * t = 2.75 m/s * 14.5 s = 40.0 m (2)[/tex]