Q1) An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours.To cover the same distance in 1(2/3) hours, it must
travel at a speed of;
A)300kmph
B)360kmph
C)600kmph
D)720kmph
Explain how you got the answer
A)300kmph
B)360kmph
C)600kmph
D)720kmph
Explain how you got the answer
1 answer:
Answer:
D) 720 kmph
Explanation:
First, let's find what distance this aeroplane covered. Distance (d) is the product of speed and time - here, we have a speed of 240 kmph and a time of 5 hours, gives us
km
Using that same fact, we can set up a new equation to solve for speed (s) when we have a distance of 1200 km and a time of 1 2/3 hours. For the sake of cleanliness, I'm gonna rewrite 1 2/3 as the improper fraction 5/3:
Multiplying both sides of the equation by 3/5:
kmph
So our answer is D.
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Answer:
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Explanation:
Given data
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Δ PE = 71 × 9.81 × 123
Δ PE = 85670.73 J
Time = 2 min = 120 sec
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Explanation:
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Answer:
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Explanation:
Given:
Refractive index for red light
Refractive index for violet
Refractive index for air
Incident angle 28.30°
According to the snell's law,
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Where transmitted angle for red light
50.18°
For violet light,
Where transmitted angle for violet light
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1.72°
Therefore, the angular separation between the red and violet components of the spectrum that emerges from the glass is 1.72°