Sample mean strength
Assume that 10 ft lengths of a certain kind of cable have breaking strengths with mean 450 pounds and standard deviation 50 pounds.
Determine the probability that the sample mean strength of 100 of these cables is below 457 lb.?
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A local politician claims that 1 in 5 automobile accidents involves a teenage driver. He is advocating increasing the age at which teenagers can drive alone.
Determine the numbers of joules of heat are essential to raise the temperature of a1.20-kg block of iron from the 22 degrees C to 89.5 degrees C. The specific heat of iron is metal is 0.450 J/g*K.
Consider the following hypothetical reactions: A->BΔH=31J, B->C ΔH=64. By using Hess's law to determine the enthalpy change for reaction A->C
A smoke particle consists of a mass of 2.20 x 10-17 kg and it is randomly moving about in thermal equilibrium having room temperature air at 31° C. Determine the rms speed of the particle?
You are instructed to provide cephalexin monhydrateg over next 24 hrs divided into 6 equally spaced doses how much would you give for every day?
Suppose you have 124 g of a mystery substance. It is made up of Hydrogen, oxygen and Carbon. It is burned in excess the oxygen. It produces 28.925 g of H2O and 161.527 g of CO2.
The internal energy of a system rises by 300 J while 900 J of work are performed on it. Determine the heat flow into or out of the system?
Explain what enthalpy change occurs in the vaporization of 10.0g of methanol when a reference gives value of +39.23 kJ/mol for the molar enthalpy of vaporization for methanol.
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