Answer:
c) True. factor four
Explanation:
The energy density of an electromagnetic wave is given by
u = ½ ε₀ E² = B² / 2μ₀
Where ε₀ is the dielectric constant and μ₀ the magnetic permittivity.
Let's apply this equation to the present case
If we double the electro field
E ’= 2 E₀
u’= ½ ε₀ (2E₀)²
u’= ½ ε₀ Eo² 4
u’= 4 u₀
Therefore the energy is multiplied by four
Let's check the answers
a) False
b) False
c) True
d) False
e) False
Answer:
C= 0.354 KJ/K
Explanation:
As we know that heat capacity is the product of mass and specific heat.Heat capacity is the measure of heat which any substance can retain a period os time.
Here given that specific heat(c) = 1.77 KJ/kg.k
Mass m= 200 gm = 0.2 kg
So the heat capacity C = m.c
C= 0.2 x 1.77 KJ/kg
C= 0.354 KJ/K
So the heat capacity 0.354 KJ/K.
Answer:
Explanation:
Energy of system of charges
= k q₁q₂ / r₁₂ + k q₁q₃ / r₁₃ + k q₃q₂ / r₃₂
q₁ , q₂ and q₃ are charges and r₁₂ , r₁₃ , r₃₂ are densities between them
9 x 10⁹ ( 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 )
= 9 x 10⁹ x 3 x 16 x 10⁻¹²
= 432 x 10⁻³
= .432 J .
Answer:
8.803 s
(but this is only if it's a free fall, which we assume since we didn't get the mass of the hulk)
Answer:
Mass.
Explanation:
I took the quiz and got the answer right