Answer:
When there is an increase in the frequency of sound waves, the wavelength decreases.
Explanation:
Given data,
The frequency of the whale changes from 200 Hz to 300 Hz
The formula for frequency and wavelength is,
λ = v/f
Where v is the velocity of the sound waves in water (1531 m/s)
The wavelength at 200 Hz is,
λ = 1531/200
= 7.655 m
The wavelength at 300 Hz is,
λ = 1531/300
= 5.1 m
Hence, when there is an increase in the frequency of sound waves, the wavelength decreases.
The first part of the microscope that should first be used to adjust the focus when starting with the lowest power lens would be the coarse adjustment knob.
There are two knobs in a typical light microscope with which objects on slides can be brought into focus:
- Coarse adjustment knob
- Fine adjustment knob
The 2 knobs are used to adjust the stage to either bring it up towards the objective lens or down away from them. The coarse adjustment knob, however, moves the stage a considerable distance with each turn. The fine adjustment knob, on the other hand, only moves the stage very little with each turn.
The lowest power lenses are often short. Hence, using the coarse adjustment knob is ideal in order to quickly bring objects on slides into focus.
The fine adjustment knob comes highly recommended at high objectives because high objectives lenses are usually long and using the coarse adjustment knob can lead to a breakage of the slide by the lens.
More on bringing objects into focus on a microscope can be found here: brainly.com/question/24319677
Answer:
462 nm
Explanation:
Given: width of the slit, d = 5.6 × 10⁻⁴ m
Distance of the screen, D = 4.0 m
Fringe width, β = 3.3 mm = 3.3 × 10⁻³ m
First dark fringe means n =1
Wavelength of the light, λ = ?
Given Information:
Amplitude of the electric field = E = 570 N/C
Speed of light = c = 3.0x10⁸ m/s
Required Information:
Amplitude of the magnetic field = ?
Answer:
Amplitude of the magnetic field = 1.90x10⁻⁶ T
Explanation:
The relation between the amplitude of the electric field and magnetic field is given by
B = E/c
Where c is the speed of light
B = 570/3.0x10⁸
B = 1.90x10⁻⁶ T
Therefore, the amplitude of magnetic field is 1.90x10⁻⁶ T
My answer -
The condition in the nucleus are likely to result in the nucleus
breaking apart is called the nuclear fission. But if it is the atomic
nucleus that is breaking apart, it should be called as the nuclear
fusion. These things usually can be caused by the decay of the
radioactive and the nuclear reaction.
P.S
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