4.0 MathCad 1

Question 1

What is Mathcad

Answer 1

An equation -solving software package that has a wide range of applications in engineering

Question 2

what is mathcad worksheet?

Answer 2

Collection of variable definitions, equations, text regions, and graphs displayed on the screen in the same manner you would write on paper

Question 3

Difference between Mathcad and your paper scratch pad

Answer 3

Automatic recalculation: if you make a change to any of your definitions in your worksheet, the rest of the worksheet is automatically updated

This makes it easy to do the “what if” calculations that are common in engineering

Question 4

Mathcad can do many things that you CANNOT do very efficiently with pencil and paper

Answer 4

1. Automatically recalculate the problem for changed values/definitions/equations etc. allowing the user to:
   
   • Easily convert a solution from one system of units to another system of units
   • Use the same set-up to solve the same problem again and again with variable inputs
   • Do a what if analysis by changing one or more inputs and see the effect on the results
   2. Use mixed units without requiring the user to build in the conversions manually
   3. Carry out symbolic math operations
   4. Use built-in as well as user-expanded reference tables of many engineering and scientific material properties and constants
   5. Plot 2-D and 3-D graphs and charts directly from given or derived relationships
   6. Embed 2-D drawings in a Mathcad worksheet and link them to the calculations
   7. Word processing that enables the user to produce a self-contained final report that also shows the solution steps
   8. Incorporate and access Excel spreadsheets

Question 5

Mathcad evaluated equations from…

Answer 5

Left to Right, then from Top to Bottom

Question 6

Math toolbar includes…

Answer 6

• Operators and Symbols
  
  • Units

Question 7

Mathcad uses Four Different kind of equal signs

Answer 7

1. Assignment or definition operator
2. Evaluation operator
3. Symbolic equality operator
4. Global assignment operator or global definition operator

Question 8

Assignment or definition operator

Answer 8

Used to define new variables
:=

Question 9

Evaluation operator

Answer 9

Used to display the value assigned to a variable, or the result of a calculation=

Question 10

Symbolic equality operator

Answer 10

Used to show the relationship between variables in an equation (algebraic equality) =(bold =)

Question 11

Global assignment operator or global definition operator

Answer 11

Operates like the regular assignment operator, except global assignments (variable definitions) are performed before evaluating the rest of the worksheet =

Question 12

How to write subscripts?

Answer 12

Math>style>subscript

Question 13

How Mathcad handles units

Answer 13

• Mathcad stores the value in base units
  
  • Mathcad performs the calculation and stores the result in base units
  • Mathcad returns the value, converting to the requested display units
  • Mathcad has a unit converter that allows you to build units into most equations (time-saver)

Question 14

Changing the result format

Answer 14

Math Formatting>General, decimal, scientific, engineering, percent

Question 15

What are the Predefined variables in Mathcad?

Answer 15

1. Pi, archimedes’ constant or ludolph’s number
   
   2. E, Euler’s number and is a mathematical constant
   3. G, acceleration of gravity
   4. %,multiplies the displayed value by 100 and displays the percent symbol

Question 16

How to get to predefined variables in mathcad?

Answer 16

Math>operators and symbols>constants

Question 17

What are the Loagarithm and exponential functions and the arguments

Answer 17

1. Exp(z)
   
   2. Log (z,b)
   3. Ln(z)

Arguments
1. Z must be scalar (real, complex, or imaginary)
2. Z must be dimensionless
3. For log and ln functions, z cannot be zero

Question 18

Standard trigonometric functions

Answer 18

Trig functions require angles in radians, however you can work with either degrees or radians. If you work with degrees include the “deg” unit abbreviation on each angle
No units necessary for radians

E.g. sin(30*deg) = 0.5

Asin(0.5) = 30 deg
Asin(0.5)=0.524 rad

Question 19

Insert and format text

Answer 19

• In a worksheet, click where you want to insert text
  
  • On the math tab>regions group>text box or text block (or press Ctrl+T to insert a text box, or Ctrl+shift+T to inset a text block)
  • Type or paste next into the inserted test region

Question 20

To enter math expressions inside a text region

Answer 20

• Click inside the text region and then > math tab > regions group > click math (or press Ctrl+shift+M)
• Type a math expression in the empty placeholder

Question 21

To format a text region

Answer 21

• Select the text or region to format
• Click the text formatting tab and choose the font, colour, etc

Question 22

equation into text region

Answer 22

You can move an equation into text region so that the equation is read as part of the text. When equations are moved inside text regions, they are still functioning equations in the Mathcad worksheet and evaluated just like any other equation.