The correct answer to the question is : 4427.75 J.
EXPLANATION :
As per the question, the mass of the nitrogen gas m = 22.25 gram.
The latent heat of vaporization of nitrogen
As per the question, the nitrogen gas will condense. During condensation, the nitrogen gas will lose or release heat equal to its latent heat.
Hence, the heat released by nitrogen gas Q =
= 22.25 × 199.0 J
= 4427.75 J.
Hence, the amount of heat released will be 4427.75 J.
Explanation:
Energy is involved in changes of state because the energy of particles of matter determines the matter's state.
Changes of state are physical changes in matter.
Energy must be absorbed to change a liquid to a gas.
Sublimation is solid to gas (no liquid involved).
1 D
2 False
3 True
4 D
Answer:
θ =28.07⁰
Explanation:
when van moves around an unbanked curve, horizontal component of normal force is equal to centripetal force
---(1)
There is no motion in vertical direction, so vertical component of normal force is balanced with weight of block i.e.
----(2)
divide (1) and (2)
v = 28 m/s
r = 150 m
g = 9.8m/
θ = 28.07⁰
(a) frequency of the wave
The electromagnetic wave travels at the speed of light:
. Since its wavelength is
, we can find the frequency of the wave by using the relationship between f,
and c:
(b) magnetic field amplitude
The relationship between the electric field amplitude E, the magnetic field amplitude B and the speed of light c for an electromagnetic wave is
And since we know E, by re-arranging the equation we can find the magnitude of B:
Answer:
a) Clockwise
b) τ = 4.67 N-m
Explanation:
Given
m = 7 Kg
R = 17 cm = 0.17 m
μ = 0.4
We use the formula
τ = R*F*Sin ∅ = R*(μ*m*g)*Sin ∅
⇒ τ = (0.17 m)*(0.4*7 Kg*9.81 m/s²)*Sin 270° = - 4.67 N-m
(Clockwise)