A source of sound moves towards an observer. What happens to the speed of sound in the medium?
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A source moves towards a stationary observer with a speed of 10m/s. If the frequency of the source is 10Hz what will be the wavelength of sound heard by the observer? Speed of sound = 330m/s.
A source of frequency 50Hz is moving towards an observer with a deceleration of 2m/sē. If its initial speed is 20m/s, what will be the maximum frequency heard by the observer? Initial distance between source and observer is 100m. Speed of sound = 330m/s.
A man jumps from a building with a source of sound. When he reaches halfway down, he starts the siren of frequency 100Hz. A person standing below him on the ground hears the first sound to be of frequency 120Hz. What is the height of the building? Speed of sound = 330m/s. Take g=9.81m/sē.
If both the source of sound and observer are moving, the apparent frequency will be different from the actual frequency. True or False?
A man is moving towards a wall with a source of sound in his hand. Frequency of source = 50Hz. Speed of man = 8m/s. If the man sends one pulse of sound, what will be the frequency heard by him after sound reflects off the wall? Speed of sound = 330m/s.
The attraction is the real proof of an object being charged.
Why is gold used in the Gold-leaf electroscope?
What happens to the plates of the apparatus if we measure alternating charge using a Gold-leaf oscilloscope?
Dr. Gilbert tried to hold a brass rod by hand and induce static electricity in it by friction. Why did he fail?
Gold-leaf electroscope can be used _______
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