Ω=2*pi*f = 2*pi*50 = 314.16
Inductive reactance, ZL = jωL = j*314.16*0.15 = j42.12
Capacitance reactance, ZC = 1/(jωC) =1/(j*314.16*0.005) = -j0.64
Impendance, Z = V/I = 240/0.1 = 2400
Now,
Z=R+j(ZL+ZC) => 2400 = R+ j(45.12-0.64) => 2400 = R + j44.48
Additionally,
2400^2 = R^2+44.48^2 => R = Sqrt (2400^2-44.48^2) = 2399.58 ohms.
Phase angle = arctan (44.48/2399.58) = 1.06°
Answer:
Explanation:
The force of drag is given by
C is coefficient of drag
is density of air
A is area which is given by 
V is the velocity
Time = (20 km) x (1 hr/2 km) x (3,600 sec/hr)
Time = (20 x 1 x 3,600 km-hr-sec) / (2 km-hr)
Time = (20 x 1 x 3,600 / 2) (km-hr-sec / km-hr)
Time =<em> 36,000 seconds</em>
(That's 10 hours.)
Answer:
32 J
Explanation:
Power is V²/R = 20²/1500 = 4/15 . . . watts
In 120 seconds, the energy is ...
(4/15 J/s)×(120 s) = 32 J
In a 2-minute period 32 joules are dissipated as heat.
Answer:
The refraction of light at the surface of water makes ponds and swimming pools appear shallower than they really are.
Explanation:
so its just the refraction of light at the surface
