Ultraviolet radiation from the sun is controlled by the ozone but if it infiltrates into the atmosphere it becomes a hazard. The uv reaches our eyes and darkens the retina and blurs vision. The fovea becomes insensitive and the cells dormant. This causes gradual blindness.
Answer:
5m/s
Explanation:
The skier accelerates at 1 m/s, then, the acceleration is:
to find the speed after 5 seconds you use the following formula:
but vo = 0m/s because the skier is at rest at the beginning.
You do v the subject of the formula:
hence, the velocity is 5m/s
If we are to place dots to teh places that have been struck by an earthquake these past 100 years, the dots would be concentrated in the east and southeast Asia region. This is because of the presence of the Pacific ring of fire. This is a major area in the Pacific Ocean where most of the earthquakes are likely to occur.
Given that,
Combined weight of a student and the waxed skis, W = 850 N
It should be given that the coefficient of friction is 0.05.
To find,
The magnitude of the normal force exerted and the magnitude of the force of friction.
Solution,
Normal force = weight of the object,
Here, weight = 850 N
Normal force = 850 N
Let f is the force of friction. It can be calculated as follows :
Hence, the normal force is 850 N and the magnitude of the force of friction is 850 N.