Answer:
but where are the options?
Answer:
The precision at which the number was measured
Explanation:
The number of digits that you use to record a measurement indicates the precision of the measurement.
Answer:
(a) V1 = 8990.00 V
V2 = 8960.13 V
Explanation:
Parameters given:
q =3 mC
k = 8.99 * 10⁹ Nm²/C²
x1 = 3 m
x2 = 3.01 m
Electric potential is given as:
V = kq/r
Where
k = Coulombs constant
q = charge
r = distance
Potential at x1 is:
V1 = (8.99 * 10⁹ * 0.000003)/(3)
V1 = 8990.00V
Potential at x2 is:
V2 = (8.99 * 10⁹ * 0.003)/(3.01)
V2 = 8960.13 V
Answer:
t = 20s
Explanation:
In order for the police car to capture the other car, both cars must travel the same length.
The distance traveled by the first vehicle is:
S = ^ Vt = 40t, where t represents the elapsed time and V the vehicle speed.
The distance traveled by the police car is:
S = at ^ 2/2 = 2t ^ 2, where t represents the elapsed time, a is the acceleration of the car.
As the distances traveled are equal:
40t = 2t ^ 2 in this way t = 20s