Answer:
Total time of flight= 3.6 hours
Speed of flight= 611.1 Km/h
Explanation:
Time taken when moving at 700 Km/h
Since speed=distance/time then time=distance/speed=1400 Km/700 km/h=2 hours
Time taken when moving at a speed of 500 Km/h
Time=800 km/500 Km/h=1.6 hours
Total time taken=2 hours+ 1.6 hours=3.6 hours
Total distance covered= 1400 Km+ 800 Km=2200 Km
Average speed=distance/total time taken=2200 km/3.6 hours=611.1 Km/h
Therefore, average speed is 611.1 Km/h
Answer: the answer is B the lower the resistance,the higher the conductivity
Explanation:
Resistance is inversely proportional to conductivity,the lower the resistance the higher the conductivity,the metal silver has a very low resistance,thus it conductivity is high
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Answer:
v² = u² + 2x²
Explanation:
v² = u² + 2as is only valid for constant acceleration. Here, the acceleration is a function of position. We can find the function of velocity by integrating. Acceleration is the derivative of velocity with respect to time:
a = 2x
dv/dt = 2x
Apply chain rule:
dv/dt = dx/dt × dv/dx
dv/dt = v × dv/dx
Therefore:
v dv/dx = 2x
Separate the variables and integrate:
v dv = 2x dx
½ v² |ᵤᵛ = x² |₀ˣ
½ (v² − u²) = x²
v² − u² = 2x²
v² = u² + 2x²