Answer:

Explanation:
To find the momentum of the recoiling particle you can use the momentum formula for a photon:

before the decay the momentum is zero. Hence, after the decay the momentum of the photon plus the momentum of the recoiling particle must be zero:

where pr is the momentum of the recoiling particle.
Using the power of the tides, energy is produced from the gravitational pull from both the moon and the sun, which pulls water upwards, while the Earth's rotational and gravitational power pulls water down, thus creating high and low tides.
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Draw a diagram to illustrate the problem as shown in the figure below.
h = height of the kite above ground.
By definition, the angle of elevation is

Therefore

Answer: 53° (nearest integer)
Average velocity = (displacement) / (total time)
Displacement = distance and direction between
the starting point and the end point
The car travels 90 meters north, then 40 meters south.
So it ends up 50 meters north of where it began.
Displacement = 50 meters north
Total time = (15 + 5) = 20 seconds
Average velocity = (50 meters north) / (20 seconds)
= 2.5 m/s north
Answer:
Between 120 and 180 seconds