A frictionless roller coaster (22kg) is at a height h traveling with a speed v0 = 10m / s. Assume that h = 20m. The speed of the
car at point B is:
1 answer:
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Answer: C. Africa
Explanation:
The data given on the graph shows that:
Asia will grow from around 1,300 million to 5,000 million in 2050 which is an increase of:
= 5,000 /1,300 = 3.84 times
Europe will decrease over that period.
Africa will go from around 300 million to 2,000 million which is an increase of:
= 2,000 / 300
= 6.67 times
Mexico
, Central America, Caribbean Islands:
= 900 / 120
= 7.5 times
United States, Canada, and Greenland:
= 400/120
= 3.33
Oceania:
= 50 / 13
= 3.85
From the options give, Africa will see the greatest increase at 6.67 times its population in 1950.
I believe you ask about speed at the end of the hose:
The volume of the bucket is 225 liters which is equal to 225
.
Hose's cross section can be counted with the typical circle's area formula (with diameter instead of radius, that's why you've got a fraction):
are filled within 15 second.
As the bucket is being filled you can say that it's volume is the volume of the water that flowed out of the hose, then:
The speed of the water can be counted with equation:
After extracting h from the volume's equation you get:
When you count the fraction you get the answer:
The volume of the bucket is 225 liters which is equal to 225
Hose's cross section can be counted with the typical circle's area formula (with diameter instead of radius, that's why you've got a fraction):
As the bucket is being filled you can say that it's volume is the volume of the water that flowed out of the hose, then:
The speed of the water can be counted with equation:
After extracting h from the volume's equation you get:
When you count the fraction you get the answer: