Reference no: EM131202849
1. An oil bath maintained at 50.5°C loses heat to its surroundings at the rate of 4.68 kJ/min. Its temperature is maintained by an electrically heated coil with a resistance of 60 S2 operated from a 110 V line. A thermoregulator switches the current on and off What fraction of the time will the current be turned on?
2. Calculate the work done on a 2500. kg car in accelerating it from rest to a speed of 100. km/hr. (Neglect friction.)
3. A lead bullet is fired at a wooden plank. At what speed must it travel to melt on impact, if its initial temperature is 25°C and the heating of the plank is neglected? Look up the properties of lead needed.
4. Considering U as a function of any two of the variables P, V, and T, prove that
5. Using the definition H = U + PV and, when necessary, obtaining conversion relationships by considering H (or U) as a function of any two of the variable P, V and T, derive the following relationships:
6. The area a of a rectangle can be considered to be a function of the breadth b and the length 1 so that a = bl . The variables b and 1 are considered to be the independent variables while a is the dependent variable. Other possible dependent variables are the perimeter p and the diagonal d .
A. Derive expressions for the following partial derivatives in terms of b and 1 o r calculate numerical answers.
B. Derive suitable conversion expressions in terms of the partial derivatives given in (A) for each of the following derivatives. Evaluate the results in terms of b and 1 . (Do not substitute the equation for p or d into that for a .)
7. Consider the differential dz = (x2 + y2)dx + 2xydy
i) Show whether or not the differential is exact.
ii) Evaluate Az in going from point (x=0,y=0) to point (x=1,y=1) on a path where y = x2. Compare this to Az between the same points on a path where x = y .
iii) Evaluate Az in going from point (x=0,y=0) to point (x=1,y=1) on a path where y = 0 from point (0,0) to (1,0) and then x = 1 from point (1,0) to (1,1)
8. Repeat the three steps of problem 7 for the differential dz = xydx + xydy
Design a three-line to eight-line decoder
: Design a three-line to eight-line (3-to-8) decoder which will decode three input variables into eight outputs. An application of this decoder is a binary-to-octal conversion, where the input variables represent a binary number and the outputs repr..
|
How those responsibilities can affect ultimate objective
: FIN200 Assignment - Explain how those responsibilities can affect ultimate objective of the company. The name of company you choose should start with the first letter of your first, last or middle name.
|
Draw the output waveform f
: A logic circuit and three input waveforms A, B, and C are shown in Fig. 7.38. Draw the output waveform F. Hint: find the simplest form for F and make a truth table for F from which the waveform can be drawn
|
What is the estate tax due with respect to lonnie death
: Lonnie died in 2015 with a taxable estate of $6,430,000. This figure does not include any value, if applicable; associated with a $5,000,000 life insurance policy Lonnie had given away in a previous year. What is the estate tax due with respect to ..
|
What fraction of the time will the current be turned on
: A lead bullet is fired at a wooden plank. At what speed must it travel to melt on impact, if its initial temperature is 25°C and the heating of the plank is neglected? Look up the properties of lead needed.
|
Prepare a statement of cash flows-using the direct method
: Condensed financial data of Odgers Inc. follow. ODGERS INC. Comparative Balance Sheets December 31 Assets 2014 2013 Cash $ 101,808 $ 60,984 Accounts receivable 110,628 47,880 Inventory 141,750 129,591 Prepaid expenses 35,784 32,760. Further analysis ..
|
Calculate by rigorous method the sending end voltage
: Calculate by rigorous method the sending end voltage and current when the line is delivering a load of 20 MW at 0.8 p.f. lagging.
|
Earnings per share-return on common stockholders equity
: The comparative statements of Osborne Company are presented here. OSBORNE COMPANY Income Statements For the Years Ended December 31 2014 2013 Net sales $1,894,859 $1,754,819 Cost of goods sold 1,062,859 1,010,319 Gross profit 832,000 744,500. Earning..
|
Possible causes of ineffective communication
: Chose one of the possible causes of ineffective communication to discuss and give an example you have seen in your experience of the cause that you chose.
|