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Q. A swimming pool has dimensions 28 m 10 m and a flat bottom. When the pool is filled to a depth of 2.30 m with fresh water, what is the force caused by water on the bottom?
Q. An insulated Thermos contains 119 cm3 of hot coffee at 64 °C. You put a 12g ice cube at its melting point to cool the coffee. By how a lot of degrees have your coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though it were pure water and neglect energy exchanges with environment.
What minimum constant acceleration does the aircraft require if the aircraft is to be airborne after a takeoff run of 222m.
A pendulum has a period of 0.80s on Earth. What is its period on Mars, where an acceleration of gravity is about 0.37 that on Earth.
A polar bear of mass 436 kg stands on an ice floe 58.10 cm thick. What is the minimum area of floe that will just support the bear in saltwater of density of 1030 kg/m3? The specific gravity of ice is 0.88.
The cubit is an ancient unit. Its length equals six palms. (A palm varies from 2.50 to 3.50 inches depending on the individual.) We are told Noah's ark was 300 cubits long, 50 cubits wide and 30 cubits high.
An airplane flies 200 km due west from city A to city B and then 300 km in the direction of 30 degrees North of West from city B to city C. In straight-line distance, how far is city C from city A.
The orbit of earth's moon has a period of 27.3 days and a radius (semi-major axis) of 2.56 x 10-3 A.U. (= 3.84 x 105 km). What is the mass of Earth? What are the units? Show the work.
An ocean liner leaves New York City and travels 20.0° north of east for 199km. How far east and how far north has it gone? In other words, what are the magnitudes of components of ship's displacement vector in the following directions.
A thin rod consists of two parts joined together. One-fourth of it is silver and three-fourths is gold. The temperature decreases by 21 C°.
A 9300 kg boxcar travelling at 23 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 15 m/s. What is the mass of the second car.
A child throws a snowball with a horizontal velocity of 18m/s directly toward a tree, from a distance of 9m and a height above the ground of 1.5m.
A bumper car with mass m1 = 113 kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 94 kg is moving to left with a velocity of v2 = -3.2 m/s.
How high is the top of the ski lift relative to base.
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