Resistance can be caused by specific resistance tools, like resistors, or loads (the part of the component that uses the electricity) like a light bulb or a speaker. Resistance is measured in ohms and can be measured by a multimeter.
Answer:
Average acceleration, 
Explanation:
Given that,
Initial velocity, u = 0 km/h
Final velocity, v = 100 km/h = 27.77 m/s
Time, t = 10 s
We need to find the average acceleration of the vehicle. It is given by the change in velocity divided by time. Som,
So, its average acceleration is 
.
The high frequency radio waves used for telecommunications links travel by line of sight and so are obstructed by the curve of the Earth. The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points.
Explanation:
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Answer:
The answer D ...............
Answer:
a) Time interval between signals according to an observer on spaceship A = 1.09h
b) Time interval between signals according to an observer on spaceship B = 1.09h
c)The speed of A relative to the station to measure a time interval of 2.00h = 2.6 * 10⁸ m/s
Explanation:
a) Time interval between signals according to an observer on spaceship A
Initial time intervals for the alert signal, Δt₀ = 1.00h
The speed of spaceship A, v = 0.400c
The formula for the time interval is given by
Δt = ∆t₀ /√(1-(v/c)² )
Δt = 1 / √(1-(0.4c/c)² )
Δt = 1 / √(1-(0.4)²
Δt = 1.09 h
b) The intervals between signals according to an observer on spaceship A and B are equal because both spaceships are moving at the same speed.
Therefore, the time interval between signals according to an observer on B is Δt = 1.09 h
c) The speed of A relative to the station to measure a time interval of 2.00h
Δt = ∆t₀ /√(1-(v/c)² )
2 = 1 /√(1-(v/c)² )
√(1-(v/c)² ) = 0.5
1-(v/c)² = 0.25
0.75 = (v/c)²
v/c = 0.866
v = 0.866c
v = 0.866 * 3 * 10⁸
v = 2.6 * 10⁸ m/s
