Answer:
the false statements
Explanation:
Radio waves, Tw or microndasm are produced by the man with different instruments, so to detect them we use an artifact that detects electrical waves
From the false statements
If the circuit is open, then there will be no light or sound. No current will flow and no air will move.
Given data:
Wave length (λ) = 2.30 m,
Frequency (f) = 370 Hz (waves/sec),
Determine the speed of the wave = ?
Speed of the wave is defined as "the distance a wave travels in a given time". And it is a product of <em>wavelength (λ) </em>and <em>frequency(f). </em>
An Important point to be remember here is <em>"when increasing the wave length of the wave does not increase the speed of the wave"</em> because the wave speed also depends on frequency (f), So, if the wave length increases wave speed decreases. As a result the product of wave length and frequency are same.
Mathematically,
Wave speed = wave length × frequency
= 2.30 m × 370 waves/sec.
= 851 m/s.
<em>Speed of the wave is 851 m/s</em>
B.) Stellar evolution is "<span>the life cycle of a star"
Hope this helps!</span>
Answer:
56.02 mph
Explanation:
Let the velocity of boat in still water is,
Given that velocity of the current is 55 mph
Now, velocity against current is, v-55
velocity along the current is v+55.
And according to question, time taken by boat to travel 1010 miles against the current is equivalent to time take to travel 110110 miles with the current.
Therefore,
Time taken against the current is,
Time taken with the current is,
Now this time is equal.
Therefore,
Therefore, this is the velocity in still water.