Answer:
Kf= 36 J
W(net) = 32 J
Explanation:
Given that
m = 2 kg
F= 4 N
t= 2 s
Initial velocity ,u= 2 m/s
We know that rate of change of linear momentum is called force.
F= dP/dt
F.t = ΔP
ΔP = Pf - Pi
ΔP = m v - m u
v= Final velocity
By putting the values
4 x 2 = 2 ( v - 2)
8 = 2 ( v - 2)
4 = v - 2
v= 6 m/s
The final kinetic energy Kf
Kf= 1/2 m v²
Kf= 0.5 x 2 x 6²
Kf= 36 J
Initial kinetic energy Ki
Ki = 1/2 m u²
Ki= 0.5 x 2 x 2²
Ki = 4 J
We know that net work is equal to the change in kinetic energy
W(net) = Kf - Ki
W(net) = 36 - 4
W(net) = 32 J
Increased lamp voltage is achieved by turning the light intensity dial.
To enlarge the diameter of the hole and let more light through the slide, the iris diaphragm was modified.
Condenser: Position it higher and closer to the slide's bottom to better direct light to the centre of the slide.
<h3>
How do you adjust the light level on a microscope?</h3>
Utilize the brightness adjustment knob to change the brightness. Turn the brightness control knob while looking through the eyepieces to make sure there is no glare in the field of view.
Use a daylight balancing filter if your compound microscope has a certain sort of illumination. It typically rests directly on top of the luminator or in a filter holder above the light. This filter is blue.
The daylight balancing filter will correct the colour temperature and produce a higher-quality image if your microscope is lighted by tungsten or halogen (and a better colour image). This blue filter is not necessary if your microscope is an LED.
To learn more about light level on a microscope, visit:
brainly.com/question/14727797
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Answer:
I think it's 3) speed and direction
Answer:
Part a)
![E = 0.188 \times 10^{-3} N/CPart b)[tex]E = 0.376 \times 10^{-3}](https://tex.z-dn.net/?f=E%20%3D%200.188%20%5Ctimes%2010%5E%7B-3%7D%20N%2FC%3C%2Fp%3E%3Cp%3EPart%20b%29%3C%2Fp%3E%3Cp%3E%5Btex%5DE%20%3D%200.376%20%5Ctimes%2010%5E%7B-3%7D%20)
N/C
Explanation:
As we know that the magnetic field near the center of the solenoid is given as
Also we know by equation of Faraday's law
EMF induced in the closed loop will be equal to rate of change in magnetic flux
so we have
so we have
Part a)
At r = 0.500 cm
we have
Part b)
At r = 1.00 cm
we have
N/C
Answer:
50 dB.
Explanation:
given,
Amplification needed by the woman,I= 1 x 10⁵ I₀
where as I₀ is the threshold frequency
overall hearing loss of the woman= ?
Using the equation of sound intensity level
The overall hearing loss of woman is equal to 50 dB.
