Answer:
1.) dV/dt = -187200πSin(120πt)
2.) No
3.) -187200
Explanation:
The voltage, V, in volts, in an electrical outlet is given as a function of time, t, in seconds, by the function V=156cos(120πt)
dV/dt = -187200πSin(120πt)
Since the rate of change above is negative, that is, its maximum is negative. definitely, it will never be equal to zero.
The maximum value of the rate of change will be its amplitude, which is
-187200
Answer:
Plain Bearings and Rolling Element Bearings -
Explanation:
two different type of bearing are:
1) Plain Bearings - Plain bearings are the easiest form of bearings and consist of only the layer of the bearings without rolling components.
2)Rolling Element Bearings - Rolling element bearings use balls or rollers between two rings – allowing movement with little rotating and sliding friction. These type of bearings include bearings for balls and rollers.
Answer:
763.94Wh
Explanation:
If the load is 120 watts running for 4 hours per night, the energy consumed is
120*4 =480 Wh
So, the energy gathered by the PV array is
E=480/(77%*96%*85%)=763.94Wh
Answer:
specification
sustainability
multiplication
Explanation:
Specification is engineering refers to a set of documented guidelines to be attained by a material, design , a good or service.
Sustainability refers to the focus of using available resources in a manner that will not compromise future generations usage on the resource.
Multiplication is simply performing product in calculations.
Answer choices A : endocrinology , and F : superficial are biological terms or vocabularies. Hence incorrect engineering vocabularies. Answer choice E: archeology is incorrect because it is a vocabulary used in geography.