a) Distinguish between sliding friction and rolling friction.
b) Low frequency sound is faint while high frequency sound is loud. Do you support this
statement? Why or why not?
(i) What is the audible frequency range for the human ear?2:
Answers
Answer:
(a)Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction takes place due to the deformation of surfaces.
b.A sound waveform has three basic physical attributes: frequency, amplitude, and temporal variation. Frequency refers to the number of times per second that the vibratory pattern (in the time domain) oscillates. Amplitude refers to sound pressure. There are many aspects to the temporal variation of sound, such as sound duration. Sound pressure is proportional to sound intensity (in units of power or energy), so sound magnitude can be measured in units of pressure, power, and energy. The common measure of sound level is the decibel (dB), in which the decibel is the logarithm of the ratio of two sound intensities or two sound pressures. Frequency is measured in units of hertz (Hz), cycles per second. Measures of time are expressed in various temporal units or can be translated into phase measured in angular degrees. Below are some definitions of terms and measures used to describe sound.(c) approximately 20 to 20000 Hz.
Answer:
answer the following question in 30 to 40 words
Q. 1 distinguish between sliding friction and rolling friction ?
Q. 2 low frequency sound is faint while high-frequency sound .Do you is load do you support this statement ? why or why not ?
Q. 3- 1 .list two short terms effect of noise pollution on human
2 state two ways to minimise noise pollution
Q. 4 Two astronauts cannot talk to each other in space without a wireless radio why ?
Answer the following question in 60 to 80 words ?
Q. 1 State two advantages and two disadvantages of friction ?
Q. 2 what are the two properties of pressure exerted by liquid? give one example each to explain this property?
answer
Please give me the all correct answer