Explain the pressure at the bottom of a swimming pool
The pressure at the bottom of a swimming pool is evenly distributed. Suppose we look at a cast iron plate of 7272 kg lying on the ground with an area of 100 m2. What is the average pressure below that? Is it just as evenly distributed?
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A pinball (solid sphere of mass = 0.2 kg, outer radius = 0.1 m) is cocked back 0.8 m on a spring (k= 50 N/m), and fired onto the pinball machine surface, which is tilted. a.) How much energy is stored in the spring initially?
the Refrigerator steadily receives a power input of 0.15 kW while rejecting energy by heat transfer to the surroundings at a rate of 0.6kW. Determine the rate at which energy is removed by heat transfer from the refrgerated space, in kW, and the
Christine has always been weak in mathematics. Based on her performance prior to the final exam in Calculus, there is a 43% chance that she will fail the course if she does not have a tutor. With a tutor, her probability of failing decreases to 13
A steel cylinder of mass 2 kg contains 4 L of liquid water at 25oC at 200 kPa. Find the total mass and volume of the system. List two extensive and three intensive properties of the water.
A population has a mean of 2200 and a standard deviation of of 400. Taking a random sample of size 100 from this population, the standard error of the mean would equal
A car of mass 1775 kg travels with a velocity of 100 km/h. Find the kinetic energy. How high should it be lifted in the standard gravitational field to have a potential energy that equals the kinetic energy?
What is Bragg Scattering angle ? (first order)for an electrons beam scattered / diffracted from the surface of Ni crystal with atomic- planes spacing D= 0.215 nm and the kinetic energy of the electron beam is 75 eV.
On the moon the gravitational acceleration is approximately one-sixth that on the surface of the earth. A 5-kg mass is "weighed" with a beam balance on the surface on the moon.
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