Is 2.5m/s faster than 4m/s
1 answer:
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Answer:
0.25 N
Explanation:
The density of the ball () = 0.0839 g/cm³ = 83.9 kg/m³
The density of water () = 1000 kg/m³
diameter = 3.77 cm = 0.0377 m
radius of ball = 0.0377/2 = 0.01885 m
The volume (V) =
Let us assume the acceleration due to gravity (g) = 9.8 m/s²
Hence:
The force is required to hold it completely submerged under water (F) is:
F = 0.25 N
The correct answer is
<span>B) UV waves are higher frequency and carry more energy.
In fact, UV waves have higher frequency than visible light. For comparison, visible light has frequency in the range 430-770 THz (</span>
)<span>, while ultraviolets (UV) have frequency higher than these values (at the order of 1 PHz, </span>
).
The energy of electromagnetic radiation is proportional to its frequency, according to the equation
where h is the Planck constant and f is the frequency. We see that the higher the frequency, the greater the energy, so UV waves carry more energy than visible light.
<span>B) UV waves are higher frequency and carry more energy.
In fact, UV waves have higher frequency than visible light. For comparison, visible light has frequency in the range 430-770 THz (</span>
The energy of electromagnetic radiation is proportional to its frequency, according to the equation
where h is the Planck constant and f is the frequency. We see that the higher the frequency, the greater the energy, so UV waves carry more energy than visible light.