Answer:
MATERIAL MEDIUM
Explanation:
Wave is a disturbance that travels through a medium and transfer energy from one point to another without causing any permanent displacement of the medium itself. The two forms of wave are the mechanical wave and the electromagnetic waves.
Mechanical wave is a wave with requires MATERIAL MEDIUM for its propagation. This means that before wave can be propagated at times, material medium is needed e.g a ripple tank. A ripple tank is a mechanical device that generates waves using an instrument called stroboscope attached to it. This kind of wave requires an external source before it can propagate compared to electromagnetic waves that does not require material medium for its propagation.
Answer:
462
Explanation:
231 cubes= half of N (because only 3 of the faces are visible, there are 6 faces altogether)
N=462
Answer:
Current = 132.35 A
The motor needs to draw 132.35 Amperes current from the battery.
Explanation:
The formula of electric power is given as follows:
Power = (Voltage)(Current)
Current = Power/Voltage
In this question, we have:
Power = 45 KW = 45000 W
Voltage of Battery Pack = 340 V
Current needed to be drawn = ?
Therefore,
Current = 45000 W/340 V
<u>Current = 132.35 A</u>
<u>The motor needs to draw 132.35 Amperes current from the battery.</u>
Answer:
θ1 = 33.38°
Explanation:
From Snell's law of refraction,
n1•sinθ1 = n2•sinθ2
We are given ;
Angle of refraction; θ2 = (90 - 26.4°) = 63.6°
Index of refraction; n1 = 1.628
Index of refraction in air; n2 will have a constant value of 1
Now, we are looking for angle of incidence θ1, so let's make θ1 the subject;
n1•sinθ1 = n2•sinθ2
So, sinθ1 = (n2•sinθ2)/n1
Plugging in the relevant values;
sinθ1 = (1 x sin 63.6)/1.628
sinθ1 = 0.5502
θ1 = sin^(-1)0.5502
θ1 = 33.38°
