Numerade

Questions asked

BEST MATCH

You are an engineer tasked with designing part of a water supply system for a remote hillside village. The system draws water at 15 °C steadily from a reservoir at an elevation of 150 m above sea level (air pressure 99 kPa) through a 100 mm diameter steel pipe to a turbine located at 100 m above sea level (air pressure 100.5 kPa). Assume g = 9.81 m/s2 a) Assuming the pipe runs full at all times, determine the slope of the pipe (S) required to achieve a minimum velocity of 2.0 m/s. b) What is the length of the pipe (L)? c) Now assume there is an obstacle at the same elevation as the turbine that will require the use of four 90 degree long-radius elbows and an additional 2 meters of straight steel piping for the outflow to reach the turbine. Determine the energy losses in the piping from the reservoir to the outflow at the turbine (major and minor) using friction factors. Check your answer with Bernoulli, assuming the outflow of the pipe is exposed to the atmosphere at 100 m elevation.

View Answer

BEST MATCH

If a budgeted activity base is not related to usage, what is a possible disincentive?

View Answer

BEST MATCH

\int (9)/(u\sqrt(5-u^(2)))du

View Answer

BEST MATCH

Taxes.... ■ Taxes are not inefficient because there is a transfer of resources and not their use, like in regulation if we consider society as a whole. ■ If we consider individual fisherman, taxes are very real costs. ■ Rent normally received by a sole owner is now received by the government ■ In fact in an open access fishery the rent is nil, then the objective of the government is to restore the rent, by reducing the effort, and inputting this rent to public fund.

View Answer

BEST MATCH

A woman of mass 48 kg jumps off the bow of a 55 kg canoe that is initially at rest. If her velocity is 4.5 m/s to the right, what is the velocity of the canoe after she jumps? Answer in units of

View Answer

BEST MATCH

In the Dividend Growth Model the discount rate and the growth rate play a big part in calculating the value of a stock. Those two variables show up in the denominator of the equation for calculating a stock value and as the growth rate (g) increases, the value of the stock

View Answer

BEST MATCH

Adolescents are more likely to make impulsive decision because: Select one: O a. they are highly vulnerable to peer pressure. O b. their prefrontal cortex is not mature till their early 20's. O c. reasoned decisions require time to consider options and freedom from social distraction. O d. all of the above are correct.

View Answer

BEST MATCH

Deregulation shifts the aggregate supply curve to the right by reducing costs and releasing resources for other uses.

View Answer

BEST MATCH

Consider the reaction: 2 methanol (e) + 3 oxygen (g) -> 2 carbon dioxide (g) + 4 water (l) that is known to occur under constant pressure conditions. How does ΔG change from its value at standard temperature and pressure when the reaction occurs at a temperature of 270K? The standard state Gibbs free energy change, entropy change, and enthalpy changes for the reaction as written above are: ΔG°rxn = -1,400 kJ/mol ΔS°rxn = -162 J/mol·K ΔH°rxn = -1,200 kJ/mol If ΔHrxn is independent of temperature between 270K and 298K, calculate the reaction's free energy change in kJ per mole at this new temperature of 270K.

View Answer

BEST MATCH

True

View Answer

erika f.