Question 8
Silicon is a semi-conductor that are mostly used in electronic devices. From the choices give, silicon is applicable in t<span>ransistor, integrated circuit and diode. But the best answer that suits this question is (B) integrated circuit.
Question 9
Power is the rate of doing work. It is calculated as,
Power = workdone/time taken to do that work.
In electricity, power = current </span>×voltage
From ohm's law, V=IR
Where I⇒current and
R⇒ resistance.
∴Power = I²R
= 6²×5
= 180 Watts
You get a more low sound.
Conversely, when the wavelength becomes shorter you get a more treble sound.
;-)
The position isn't changing ! The object is not moving. It's just sitting there. No matter what 't' you're interested in, the position is exactly the same as it has been since t=0 .
That's (4 divisions) x (2.8 m/div). I'm sure you can calculate the number of meters.
Transmission occurs when the light is not reflected or absorbed.
I think the question is also fishing for "refracted", but that's wrong. Light can be transmitted even though it's refracted, and I'd say it's the same for dispersed and scattered.
Extreme pressure in the sea is<span> the energy source that resulted in compression of tiny sea creatures into fossils, over millions of years. These creatures got buried under the ocean or river sediments, and the pressure caused their compression, leading to the formation of oil and natural gas.</span>
