The basic relationship between wavelength
, frequency f and speed c of an electromagnetic wave is
where c is the speed of light. Substituting numbers, we find:
Answer:
D. A zinc Zn contains 30 protons inside the nucleus and 30 electron outside the nucleus
Answer:
According to Archimedes principle the upthrust on the body is equal to the weight of the water displaced by the body. ... Here, the mass would be the net difference in the weight of the object.
<span>You are given two cars, one in front of the other, that are traveling down the highway at 25 m/s. You are also given a frequency of 500 Hz of the car travelling behind it. You are asked what is the frequency heard by the driver of the lead car. This problem can be solved using the Doppler effect
sound frequency heard by the lead car = [(speed of sound + lead car velocity)/( speed of sound + behind car velocity)] * (sound of frequency of the behind car)
</span>sound frequency heard by the lead car = [(340 m/s + 25 m/s)/(340 m/s - 25 m/s)] * (500 Hz)
sound frequency heard by the lead car = 579 Hz
The intensity of most cyclones reduces after hitting land
because land takes away the heat and moisture of tropical ocean water. In order
to survive, cyclone storms need evaporation from the warm sea surface. Intensity
also decreases because of greater fiction on land, compared to the sea surface.
