A microscope is used for the purpose of magnification of an object which is usually very minute - so much so that it is not easy to be seen with the naked eye. If a mount slide contains the word <em>lens</em> which is easily readable with the naked eye and if this slide is kept under a microscope, the text will appear:
- From left to right that is in the same original direction as it was positioned on the slide.
- Highly magnified which may make it illegible to be read using the microscope.
Answer:
Explanation:
Given that,
Ey = 375•Cos[kx - (2.20 × 10¹⁴t)]
Speed of light
c = 3×10^8m/s
What is the wavelength?
Generally,
The wavelength of electromagnetic wave is give as
Ey = Emax•Cos(kx—wt)
k = 2π/λ
w = 2πf
Ey = Emax•Cos(2πx/λ—2πft)
Comparing this to the wave equation given,
We notice that,
2πx/λ = kx
Also,
2.20 × 10¹⁴t = 2πft
t cancels out
2.20 × 10¹⁴ = 2πf
f = 2.20 × 10¹⁴ / 2π
f = 3.5 × 10¹³ Hz
Since we are given that
c = 3×10^8m/s
Then, using relationship between c, v and λ.
c = fλ.
λ. = c/f
λ. = 3×10^8 / 3.5 ×10¹³
λ. = 8.57 × 10^-6m
λ. = 8.57 μm
The wavelength of the electromagnetic wave is 8.57 micro meter (8.57 μm)
Answer:It is actually the South Magnetic pole
Explanation:The magnetic pole near earth's geographic north pole is actually the south magnetic pole. When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole.
This direct transfer<span> of </span>heat<span> from one object to another is called conduction.</span>
Answer: Option D is Correct!
In an orbiting station, after one foot pushes off there isn't a force to bring the astronaut back to the "floor" for the next step
Explanation:
Imagine how hard it is to jump as high as 6 meters on earth. This is as a result of the earth's gravitational pull, also known as the force of gravity, which is the force by which the earth attracts objects to towards it's center. This force of gravity accounts for the weight of a body, according to the equation below:
w=mg
Where;
W= weight of body
m= mass of body
g= acceleration due to gravity
But in space, the gravitational pull rule doest not apply. Because the moon's gravity is 1/6 of of the Earth, this leads to weightlessness in space. As a result, whenever an astronaut tries to walk normally inside an orbiting space station, there isn't enough gravitational pull to allow that. He gets thrown up due to weightlessness in space.