Gladiators of Physics Plz Help On This Question. Steps will help! with formula
1 answer:
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Answer: Option B
The wavelength for a radio wave with a frequency of 2 × 10⁴ Hz is
1.5 × 10⁴ m.
Explanation:
Wavelength is the measure of distance between two successive crests or troughs in a standing wave. Also wavelength can be measured as the ratio of velocity of light to frequency. It is like this because wavelength is inversely proportional to the frequency.
As c = 3 × 10⁸ m/s and the frequency is 2 × 10⁴ Hz, then the wavelength will be
So, the wavelength for a radio wave with a frequency of 2 × 10⁴ Hz is
1.5 × 10⁴ m.
Here coffee is filled into a glass cup and when it is heated expansion of coffee as well as glass occurs
we will find the change in volume of glass cup and change in the volume of coffee.
volume expansion is calculated by
for pyrex glass we have
now by the formula
Now for the expansion of coffee
now the expansion of coffee will be
now the coffee that will spill out of the cup will be
so 9.15 mL coffee will spill out of the cup