Estimate the average force exerted by the racket
Consider a tennis player who hits a serve at 140 mi/h (63 m/s). Estimate the average force exerted by the racket on the ball (m=57g)?
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A solution with 0.10M of sodium propipnate, and another solution contains 0.12M hydrofluric acid and 0.10M sodium floride.Which of these solution is a buffer solution? State the reason PLZ?
The boiler in a steam power plant takes liquid water at 10 MPa, 40 C (through a 30 mm diameter tube) at the rate of 3 liters/s and produces saturated vapor at the exit at 9 MPa. What is the rate of heat transfer to the water?
Assume you could titrate to the third equivalence pt ofH3PO4. What would be the relationship of Volume at equivalence pt 3 to V equiv. 2 to V equiv. 1?
Find the minimum speed at which a car can travel around this curve without skidding if the coefficient of static friction between the road and the tires is 0.7. Answer in units of m/s.
If the coefficient of performance of the heat pump is 4.5, determine the power required to run the heat pump. What is the lowest power required in theory?
To see if brain stimulant affects test scores, we randomly assign subjects to three groups of five individuals each. One group receives a high dose of the stimulant, another gets a low dose, the third receives a placebo. Then all take the same tes
A die with six faces has the number 1 painted on three of its faces, the number 2 painted on two of its faces, and number 3 on one face. Assume each face is equally likely to come up.
An aqueous solution at 25C has a H+ concentration of 4.0 x10-2 molar. What is the OH- concentration in the same solution in moles per liter?
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