Complete the sentence.
2 answers:
Answer:
b. alternating current transmitted at high voltages, but usually used at low voltages.
Explanation:
As we know that transformer is used to convert high voltage AC to low voltage or vice versa.
Here this AC voltage is transmitted at high voltage conditions because here power remains constant.
this power is given by
now if we increase the voltage then the current will be less due to which the heat loss in transmission line is small
now when we need to supply it to the homes we will have to decrease the voltage by using the transformer again
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Answer:
51.96 m/s^-1
Explanation:
a) see the attachment
b) As we know the velocity of the projectile has two component, horizontal velocity v_ox. and vertical velocity v_oy as shown in the figure. At the highest point of the trajectory, the projectile has only horizontal velocity and vertical velocity is zero. Therefore at the highest point of the trajectory, the velocity of the projectile will be
v_ox=v_o*cosФ
=60*cos (30)
= 51.96 m/s^-1
Answer:
The average speed of the elevator going down in the abandoned mine is 17.722mph.
Explanation:
If the elevator takes 90 seconds to descend a height of 713m, the average speed of the elevator is:
And if 1m/s is 2.23694mph, the average speed is:
.