Answer:
FLASH FLOODS CAN CAUSE VEHICLES TO FLOAT AND FILL WITH WATER, TRAPPING AND DROWNING PEOPLE. WHILE ESPECIALLY DANGEROUS AT NIGHT AND IN DEEP WATER, EVEN ____ INCHES OF WATER CAN FLOAT SOME SMALL CARS.
The Answer is SIX Inches.
Explanation:
Flash floods: are short-term events and are associated with short, high-intensity rainfall which occur when creeks that are normally dry fill up and other creeks overflow. Densely populated areas have a high risk of flash floods. Water levels in flash floods can rise one foot in five minutes making Six inches of water able to reach the bottom of most passenger cars. Moving water will exert pressure on a car. The car floats downstream when stream force exceeds the friction force, the car will be carried when bouyancy force (which is the upward force exerted by any fluid upon a body placed in it) is greater than vehicle weight.
Answer:
h = 4.04 m
Explanation:
Given that,
Mass of a child, m = 25 kg
The speed of the child at the bottom of the swing is 8.9 m/s
We need to find the height in the air is the child is able to swing. Let the height is h. Using the conservation of energy such that,
![mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}](https://tex.z-dn.net/?f=mgh%3D%5Cdfrac%7B1%7D%7B2%7Dmv%5E2%5C%5C%5C%5Ch%3D%5Cdfrac%7Bv%5E2%7D%7B2g%7D)
Put all the values,
![h=\dfrac{(8.9)^2}{2\times 9.8}\\\\h=4.04\ m](https://tex.z-dn.net/?f=h%3D%5Cdfrac%7B%288.9%29%5E2%7D%7B2%5Ctimes%209.8%7D%5C%5C%5C%5Ch%3D4.04%5C%20m)
So, the child is able to go at a height of 4.04 m.
Answer:
gravityis an invisible force that pulls objects toward each other. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass .
Answer:
Nuclear fusion would not occur in stars of any mass.
Explanation:
Stars are made of exploding balls of hydrogen and helium. Without the right amount of hydrogen, there would be no nuclear fussion.