The answer is 5.88 · 10⁻⁷<span> m.</span>
To calculate this we will use the light equation:
v = λ · f,
where:
v - the speed of light (units: m/s)
<span>λ - the wavelength of the ray (units: m)
</span>f - the frequency of the ray (units: Hz = 1/s <span>since Hz means cycles per second (f=1/T))
</span>
It is given:
f = 5.10 · 10¹⁴ Hz = 5.10 · 10¹⁴<span> 1/s
v = 2.998 </span>· 10⁸<span> m/s
</span><span>λ = ?
</span>
If v = λ · f, then λ = v ÷ f:
λ = 2.998 · 10⁸ m/s ÷ 5.10 · 10¹⁴ 1/s
= 0.588 · 10⁸⁻¹⁴ · m
= 0.588 · 10⁻⁶ m
= 5.88 · 10⁻⁷ m
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Answer: 38.2 μC
Explanation: In order to solve this problem we have to use the relationship for a two plate capacitor with a dielectric so:
C= Q/V= we also know that for two paralel plates C=εo*k*A/d and V=E/d
where k is the dielectric constant, A plate area, V is potential difference; E electric field and d the separation between the plates.
reorganizing we have:
Q/A=σ= E*k/εo= 1.2 * 10^6*3.6/8.85 * 10^-12=38.2μC
Answer:
so the kinetic energy is 20Nm
Explanation:
mass of the body=m=62kg
velocity of the body=v=0.8m/s
K.E.=?
AS WE KNOW THAT
K.E.=
mv²
putting values
K.E.=
×62kg×(0.8m/s)²
K.E.=31kg×0.64m²/s²
K.E.=19.84Nm≈20Nm
i hope it will help you:)
Answer:
22.74 m/s
Explanation:
u= 5.0
a= 2.4
t= 7.39
Therefore the final velocity can be calculated as follows
v = u + at
v= 5 + 2.4(7.39)
v= 5 + 17.736
v= 22.74 m/s
Hence the final velocity of the object is 22.74 m/s
