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Rashid [163]
2 years ago
8

A wave travels with speed 200 m/s. Its wave number is 1.5 rad/m. What are its (a) wavelength and (b) frequency

Physics
1 answer:
Vladimir [108]2 years ago
5 0

Answer:

(a)

Explanation:

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Select the correct answer.
Svetllana [295]

Answer:

Both are electromagnetic waves

Explanation:

Both microwaves and light waves form a part of the electromagnetic spectrum. Electromagnetic waves are produced as a result of oscillating magnetic and electric fields. when arranged in order of frequencies and wavelengths they form the electromagnetic spectrum.

6 0
3 years ago
If the world population grows at a constant rate of 1.8% per annum, how many years will it take to double? A) 17.7 years
AleksandrR [38]

Answer:

after 38.8 years it will double

correct option is D 38.8 years

Explanation:

given data

population grows rate = 1.8%

to find out

how many years will it take to double

solution

we consider here initial population is x

so after 1 year population will be = (100% + 1.8% ) x = 1.018 x

and after n year population will be = 1.018^{n} x

so it will double

2x = 1.018^{n} x

take log both side

log 2 = n log (1.018)

n = \frac{log2}{log1.018}

n = 38.853

so after 38.8 years it will double

correct option is D 38.8 years

4 0
2 years ago
Will mark as brainliest if correct!!!!!!!!!!!!!!!!!!!!!!!!!
Digiron [165]

Answer:

Incident ray

Explanation:

"To describe the reflection of light, we will use the following terminology. The incoming light ray is called the incident ray. The light ray moving away from the surface is the reflected ray. The most important characteristic of these rays is their angles in relation to the reflecting surface."

https://www.siyavula.com/read/science/grade-11/geometrical-optics/05-geometrical-optics-03

3 0
3 years ago
Read 2 more answers
Which of the following will increase the force of gravity between two charged objects without affecting the electric force?
jasenka [17]

Answer:

I believe the answer is D

Explanation:

3 0
3 years ago
How do physicists define velocity?
Natalija [7]

Answer:

Velocity, quantity that designates how fast and in what direction a point is moving.

Explanation:

7 0
3 years ago
Read 2 more answers
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