1. Which wave phenomenon is illustrated by this image?
O A. Refraction
O B. Diffraction
O C. Diffusion
O D. Interference

Explanation:

Acceleration = final velocity - initial velocity

______________________

time taken

= 20 m/s - 60m/s

________________

5seconds

= -40 m/s

_______

5 seconds

= -8m/s^2

The distance of the airplane from the radar will be 1.08×10⁶ m. Distance can refer to a physical length.

Distance is a numerical representation of the distance between two objects or locations.

The distance of the airplane from the radar is found by the formula;

Distance = velocity × time

Distance =  3.0 x 10^8 m/s× 0.0036 s,

Distance =  1.08×10⁶ m.

Hence, the distance of the airplane from the radar will be 1.08×10⁶ m.

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Answer:

neutrons

Explanation:

Neutrons are usually released when fission takes place. Fission of a nucleus may be spontaneous, that is, it may happen at random due to internal processes within the nucleus. Fission can also be induced by bombarding a nucleus with a neutron.

Answer:

See below

Explanation:

F = ma

7 X 10^4   =  1.05 x 10^5   * a

a = .666  = 2/3 m/s^2

Answer:

i need the describtion like what i need to do

Explanation:

Answer:

it's easy bro once try yourself if you can't then l am here

Answer:

for a cell to produce a current the cell electrodes of the cell must have a potential difference option A is the correct answer

Answer:

16 velocity

Explanation:

The force of the tripped catch exerted on the 2.5 Kg ball moving at 8.5 m/s to the Left is 160 N

The force exerted on the ball can be obtained as follow:

F = m(v + u) / t

F = [2.5(7.5 + 8.5)]/ 0.25

F = 40 / 0.25

F = 160 N

Thus, the force exerted on the ball is 160 N

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Answer:

b)

Explanation:

The work done by friction is equal to the all of the initial Kinetic Energy lost when the vehicle comes to a complete stop

KE = 1/2 m v^2

       72 km / hr = 20 m/s

 KE = 1/2  *  1000 kg  * (20 m/s)^2  = 200 000 J = 2 x 10^4 J

The wavelength of the water wave having a amplitude of 1.2 meters every 0.4 seconds is 1.8 m .

Wavelength is the total distance traveled by a wave in one cycle.

To calculate the wavelength of the wave, we use the formula connecting

speed, wavelength, and Period.

Formula:

Where:

Make λ the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The wavelength of the water wave having a amplitude of 1.2 meters every 0.4 seconds is 1.8 m .

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Answer:

Line 2 is the amplitude

Explanation:

The amplitude is the distance from equilibrium to the top of the maximum or minimum of the wave.

Answer:

B. Homogenous mixture

Explanation:

........

Answer:

"where crests and troughs have their maxima at the same time"

Crests and troughs are 180 deg out of phase and when they have their maxima at the same time and place, their net contribution will be zero"

Answer:

Explanation:

[tex]q_{1} =+2.6 X10^{_-6}C \\q_{2} =-5.4 X10^{_-6}C \\F=6.5mN\\F=\frac{Kq_{1}q_{2} }{d^{2} }[/tex]

The formula for the fundamental frequency for an open tube at one end is : F = nV/4L the integer n = 3 which describe the frequency 450 hertz and length of tube L = 0.6m approximately

Frequency of the object is defined as the number of cycles attend in a second .

Given that a tube is open only at one end. And a certain harmonic produced by the tube has a frequency of 450 Hz. The next higher harmonic has a frequency of 750 Hz. The formula for the fundamental frequency for an open tube at one end is :

[tex]F = \dfrac{V}{4L}[/tex]

That is, 1st harmonic

[tex]\dfrac{V}{4L} = F[/tex]

2nd harmonic =

[tex]\dfrac{3V}{4L} = 3F[/tex]

3rd harmonic =

[tex]\dfrac{5V}{4L} = 5F[/tex]

The general formula can therefore be [tex]F =\dfrac{ nV}{4L}[/tex]

For the first harmonic in the question,

[tex]450 = \dfrac{343n}{4L}[/tex]

make 4L the subject of the formula

[tex]4L = \dfrac{343n}{450}[/tex]

The next higher harmonic will be

[tex]750 = \dfrac{343(n + 2)}{4L}[/tex]

make 4L the subject of the formula

[tex]4L = \dfrac{343(n + 2)}{ 750}[/tex]

Equate the two 4L

[tex]\dfrac{343n}{450} = \dfrac{343( n + 2)}{750}[/tex]

cross multiply

[tex]257250n = 154350( n + 2 )[/tex]

[tex]257250n = 154350n + 308700[/tex]

collect the likes term

[tex]257250n - 154350n = 308700[/tex]

[tex]102900n = 308700[/tex]

[tex]n =\dfrac{ 308700}{102900}[/tex]

n = 3

Given that the speed of sound in air is 343 m/s, The length of the tube can be calculate by using the same formula.

[tex]F = \dfrac{nV}{4L}[/tex]

[tex]450 = \dfrac{3(343)}{4L}[/tex]

[tex]4L = \dfrac{1029}{450}[/tex]

4L = 2.28

[tex]L = \dfrac{2.28}{4}[/tex]

L = 0.57 m

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The rest energy of the proton will be 938 MeV. The rest energy is related to the rest mass of the proton.

The rest energy is the rest mass times the square of the speed of light of a particle at rest in an inertial frame of reference.

The rest energy is found as;

[tex]\rm E_R= mC^2\\\\ E_R=(1.67 \times 10^{-27})\times 3 \times 10^8)^2\\\\ E_R= 9.375 \times 10^8 / eV[/tex]

Convert into the mega electron volt;

[tex]\rm E_R= 938 \ MeV[/tex]

Hence, the rest energy of the proton will be 938 MeV

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Answer:

600 million years

Explanation:

i think its pretty simple and u should memorize it :)

Answer: Proxima Centauri is the closet star about 40,208,000,000,000 km away. 

Explanation:

Answer:

The closest star is about 25,300,000,000,000 miles (39,900,000,000,000 kilometers) away

Explanation:

Answer:

the distance the weight is lifted

Explanation:

The total distance traveled by the ball is determined as 49.68 ft.

The height travelled by the ball or the maximum height attained by the ball is calculated as follows;

v² = u² - 2gh

0 = u² - 2gh

2gh = u²

h = u²/2g

h = (40²)/(2 x 32.2)

h = 24.84 ft

Total distance = 2 x 24.84 ft = 49.68 ft

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Answer:

l=3.5 x 10^-10m

Explanation:

just toook the test got it right good luck!

Answer:

The radius of the new planet is ~2.04 * 10⁶ m, or 2,041,752 m.

Explanation:

We can use Newton's Law of Universal Gravitation:

Let's look at Newton's 2nd Law:

We can set these equations equal to each other:

The mass of the second mass (astronaut) cancels out. We are left with:

We are solving for the radius of the new planet, so we can rearrange the equation:

Substitute in our known values given in the problem (G = 6.67 * 10⁻¹¹ ; M = 7.5 * 10²³ ; a = 12).

The radius of the new planet is ~2.04 * 10⁶ m.

Answer:

Here is the solution hope it helps:)

Answer:

280v

Explanation:

The increasing order for the first ionization energy has been:

< C < N < O.

The first ionization energy has been the amount of energy required for removing the electron from the gaseous state. The molecules that have small structures and available valence electrons, the ionization energy has been decreased.

In the periodic table, on moving from left to right there has been an increase in the size of the atom, as well as the valence electrons. The increase in size results in more attraction by the nucleus resulting in increased first ionization energy.

The increasing order for the first ionization energy has been:

C < N < O.

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Answer:

velocity = Displacement

Time

Velocity = 100m 45° SE

45s

= 2. 11m/s 45° SE

Answer: summer

Explanation:

In June, when the Earth is tilted towards Sun and the Sun reaches its highest point in the sky, that is called the summer solsticeand is the longest day of the year.

Answer:

5.097 m

Explanation:

H = vo t - 1/2 a t^2

   = 10t - 1/2 (9.81) t^2       max occurs at -b/2a   =  10/9.81=1.0194 sec

  sub in this 't' value to get H =5.097 m

Answer:

Sound intensity is measured with a sound level meter or Sound pressure Level (SPL) Meter.

Explanation:-

It measure sound intensity is the sound pressure level. The unit of measurement is decibels.