Answer:
Explanation:
Net electric field at the centre will be zero .
Since all the charges are equal and they all are symmetrically situated around the centre . So the electric field produced by each will cancel out each other and hence the resultant electric field will be zero . It happens because electric field is a vector quantity and therefore it adds up vectorially . All the four electric field will form two pairs , in each pair electric fields are acting in opposite direction . So they all cancel out to zero .
D. distance
A light-year is the distance light would travel in 1 year.
Answer:
v = 18.84 m/s
Explanation:
Let the question says,"The blade of a 0.30 m diameter fan rotates 1200 rev / min. calculate the tangential speed."
It is given that,
Diameter of a blade of fan is 0.3 m
Angular velocity of the fan is 1200 rev/min or 125.66 rad/s
We need to find the tangential speed of the fan. The relation is given by :
r is radius of fan
So, the tangential velocity is 18.84 m/s.
Answer:0.003 amperes
Explanation:
Quantity of charge=0.009
Time=3.5seconds
current=quantity of charge ➗ time
Current=0.009 ➗ 3.5
Current=0.003 amperes
A). The drawing looks like a ladder with 4 rungs.
One rung is a 90-volt battery.
The other 3 rungs are the 3 resistors.
b). The equivalent resistance is the reciprocal of (1/15 + 1/30 + 1/60).
That's the reciprocal of 7/60, or about 8.571... ohms.
c). I = V/R = 90 / 8.571... = 10.5 Amperes.
d). The 60-ohm resistor is connected directly across the battery.
Power = V²/R = (90²) / 60 = 135 watts. Better COOL that baby !
