3 Alpha Centauri is approximately 4.3 light years
1 answer:
You might be interested in
Answer:
993.52 Hz
Explanation:
The frequency of sound emitted by the stationery train is 1057 Hz.
The car travels away from the train at 20.6 m/s.
The frequency the observer hears is given by the formula:
where v = velocity of sound = 343 m/s
vo = velocity of observer
f = frequency from source
This phenomenon is known as Doppler's effect.
Therefore:
The frequency heard by the observer is 993.52 Hz.
Answer:
The blender was running for 35 seconds.
Explanation:
Given:
Power of the blender is,
Work done by the blender is,
We know that, power is defined as the rate at which work is done by the body.
Here, we are given the power and work done and we are asked to find time taken.
Let the time of running of the blender be 't' seconds.
So, the power of the blender is given as:
Rewriting the above in terms of 't', we have
Plug in the given values and solve for 't'. This gives,
Therefore, the blender was running for 35 seconds.
Answer:
Umax = 105.8nJ
Umin =-105.8nJ
Umax-Umin = 211.6nJ
Explanation:
