because he is carrying more mass and as the ground is muddy his feet goes in due to the pull of gravity
Answer:
Explanation:
Capacitance of the capacitor = 13.5μF
Voltage across plate is 24V
Dielectric constant k=3.55.
a. Energy in capacitor is given by
E=1/2CV^2
We want to calculate energy without the dielectric substance
Given that C=13.5 μF and V=24V
The capacitance give is with dielectric so we need to remove it
C=kCo
Co=C/k
Then the Co=13.5μF/3.55
Co=3.803μF
Then
E=(1/2)×3.803×10^-6×24^2
E=1.1×10^-3J
E=1.1mJ
b. Energy in capacitor is given by
E=1/2CV^2
The capacitance given is with a dielectric, so we are going to apply it direct.
Given that C=13.5 μF and V=24V
Then
E=(1/2)×13.5×10^-6×24^2
E=3.89×10^-3J
E=3.9mJ
c. The energy without dielectric is 1.1mJ and the energy with dielectric is 3.9mJ
The energy increase when the dielectric material is added
d. Dielectrics in capacitors serve three purposes: to keep the conducting plates from coming in contact, allowing for smaller plate separations and therefore higher capacitances;
Therefore, Since dielectric allow higher capacitance, and energy of a capacitor is directly proportional to the capacitance, then the higher the capacitance the higher the energy.
Answer:
Correct answer: 11. Total distance d = 200m ; 12. Vav = 3.63m/s ;
13. Total displacement Dt = 0m ; 14. V₂(10s-15s) = 0 m/s ;
15. V₃(15s-40s) = 4 m/s ; 16. V₁(0s-10s) = 6 m/s > V₄(40s-55s) = 2.67 m/s
Explanation:
The whole movement can be divided into four stages.
In the first stage the subject moves 60m in a positive direction for 10s,
in the other it is stationary for 5s, in the third it moves 100m in the opposite (negative) direction for 25s and in the fourth in the positive 40m for 15s.
11. Total distance = 60 + 0 + 100 + 40 = 200m
12. The formula for calculating the average speed (velocity) is
Vav = (S₁ + S₂ + S₃ + S₄) / (t₁ + t₂ + t₃ + t₄)
Vav = (60 + 0 + 100 + 40)/ (10 + 5 + 25 + 15) = 200/55 = 3.63 m/s
13. The movement started from the origin and ended at the origin
Total displacement is zero meters.
14. The speed between 10s and 15s is zero, because he did not move.
15. V₃ = S₃/t₃ = 100/25 = 4 m/s
16. V₁ = S₁/t₁ = 60/10 = 6 m/s and V₄ = S₄/t₄ = 40/15 = 2.67 m/s
V₁ > V₄
God is with you!!!
