Answer:
2000years
Explanation:
We will either convert the distance to centimeters or speed to meters/second.
Converting distance to centimeters: 100 meters= 100*100centimeters =10000centimeters.
time=distance/speed
t=10000/5=2000 years
Her acceleration is
(250) divided by (the swimmer's mass, in kilograms).
The unit is " meters per second² " .
Answer:
12.64968 Hz
Explanation:
v = Velocity of sound in seawater = 1522 m/s
u = Velocity of dolphin = 7.2 m/s
f' = Actual frequency = 2674 Hz
From Doppler effect we get the relation
The frequency that will be received is 2661.35032 Hz
The difference in the frequency will be
Answer:
They are in free-fall motion.
Explanation:
The Earth orbiting astronauts are falling at an acceleration that is the same or greater than the acceleration due to gravity i.e., 9.81 m/s². If you are continuously falling at this rate then you will feel weightless.
This same effect is felt while going down in an elevator. When you down in an elevator you feel that you are lighter and feel that something is pushing you up. Earth-orbiting astronauts feel the same effect but the accelration is greater hence they feel weightless.
