Physics, 27.03.2020 09:58 karnun1201

Why might calcium be important in the diet of many living
things?

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Physics, 22.06.2019 06:10, crystalryan3797

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

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Physics, 23.06.2019 07:50, yedida

In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj.   the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.

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Physics, 23.06.2019 17:00, anthonybowie99

7)an object is thrown straight up with an initial velocity of 3 m/s. what is its acceleration at its maximum height? a)zero b)3 m/s2 c)-9.8 m/s2 d)none of the above

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Physics, 24.06.2019 04:10, ewash04

An optical inspection system is used to distinguish among different part types. the probability of correct classification of any part is 0.98. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function and cumulative mass fun