Adventure

MessageBox.Show(Result.ToString());

I am able to send my results to a Dialog Box, but I want the results to go to a text box or lable to display the results. For some dang reason I have not been able to do this with Numbers. here is a small snip of code.

private void button1_Click(object sender, EventArgs e)

{

isNumber = double.TryParse(tbUserInput.Text, out outputValue); // Check for anything other than a number

if (!isNumber)

{

MessageBox.Show("Please only numbers!"); // You will get this message box if you enter nothing or text.

}

else

{

UserInput = double.Parse(tbUserInput.Text); // This converts the text from the text box into an integer.

Result = (UserInput - 32.0) / 1.8; // This is the formula for the convertion.

MessageBox.Show(Result.ToString());

}

}

Consider two vectors, of length 2.0 and 3.0, separated by angle of 90 degrees. What is the magnitude of their cross product?

1) 0.0

2) 1.0 ( This is my answer)

3) 5.0

4) 6.0

Consider two vectors, of length 4.0 and 2.5, separated by an angle of 30 degrees. What is the magnitude of their cross product?

1) 0.0

2) 5.0 ( This is my answer)

3) 6.0

4) 10.0

Is this correct?

Consider two vectors A and B. Let A = (5,0,0 and B = (0,3,0). What is the direction of the cross product?

1) along the x axis

2) along the y axis

3) along the Z axis ( This was my answer )

4) cannot be determined from the information given

Consider again the vectors in the preceding problem. What is the magnitude of the cross product?

1) 0.0

2) 5.0

3) 15.0 ( This was my answer)

4) 75.0

Consider two vectors A and B. Let A = (0,3,0) and let B = (0,7,0). What is the magnitude of the cross product?

1) 0.0

2) 9.0

3) 21.0

4) 75.0 (This is my answer)

Are these answers correct?

1. The cross product of two vectors is perpendicular (at a right angle) to both of the original vectors.

1) True (This was my answer)

2) False

2. The magnitude of the cross product of two parallel vectors is

1) 0 (This was my answer)

2) 1

3) 1.414 times the product of their magnitudes

4) infinity

3. Two vectors whose relative angle is 180 degrees always yield a zero cross product.

1) True ( This was my answer)

2) False

Are the above correct. Thanks for the help...

When cross multiplying, we measure the angle between two vectors by beginning with the first vector written, and ending with the second. Thus, we can have negative angles between the vectors being multiplied. What effect will this have on the answer we obtain for the cross product, compared to the answer we obtain when 0(theta) is positive? (Hint: The absolute value of sin 0(theta) = the absolute value of sin (-0(theta))).

1. The magnitude will be zero.

2. The magnitude will be the same, but it will point in the opposite direction.

3. The magnitude will be greater, but it will point in the same direction.

4. The magnitude will be smaller, but it will point in the opposite direction.

I believe the answer is 1. (Magnitude can never be negative) Is this correct? This Question confounds me.

1. Can the position of a point in space be used to represent a vector quantity?

1) No, because a point is dimensionless; that is, it has no size.

2) No, because the position of a point has neither magnitude nor direction.

3) Yes, because the position of a point has magnitude only

4) Yes, because the position of a point can represent magnitude and direction.

My answer is 4

2. Can spherical coordinates be used to represent a vector quantity?

1) No, because three numbers must be specified, and spherical coordinates use only two.

2) No, because there is no position vector in this system.

3) Yes, because spherical coordinates can represent magnitude and direction.

4) Yes, because vectors are always curved lines.

My answer is 3

Is this correct.. Thanks.

Question 1

If A = B, (That is, Ax=Bx,Ay=By, and Az=Bz) what is the direction of A+B?

1) The same direction as A

2) a diffrent direction then A

3) the opposite direction of A

My answer is #1

Question 2

In question 1 what is the length of A + B

1) Zero

2) Twice the length of A

3) Four times the length of A

Answer is 2

Is this correct. Thanks

1.) The position vector of A has the Cartesian coordinates (20,30,50). The position vector of B has the Cartesian coordinates (10,40,90). What are the coordinates of the position vector of A+B

1. 10, 10, 10

2. 10, 10, 40

3. 10, -10, -40

4. 30, 70, 140

My answer is #4

2.) What is the length of the position vector A+B in question 1, above?

1.) 17.32

2.) 42.43

3.) -42.43

4.) 159.4

answer is 2 is this correct.

Thanks.

1. Consider two vectors A and B. Let A=0 (that is, Ax=0,Ay=0,and Az = 0). How does the direction of A+B compare with the direction of B?

1) They have the same direction

2) They are perpendicular

3) They have diffrent directions

2) For the vectors givin in question 1 above, what is the length of A+B?

1) Zero

2) the same length as A

3) the same length as B

4) twice the length of B

The answers I have is #1 and #1 for the questions above. Is this correct?

a. The spherical coordinates of a point are (10,20,30). What is the distance between the point and the origin of the coordinate system?

1. 10

2. 14.4

3. 20

4. 30

b. In the question above, what is the angle 0(angle sign) ?

1.10 degrees

2.14.1 degrees

3.20 degrees

4.30 degrees

Ok I have figured out the rest Cartesian, Cylindrical and now I am stuck on Spherical.. For the life of me I cannot get the answer that fits the choices above.. for question A I am getting 37.4 This is because R= Distance from Origin... but 37.4 is not an answer.. and for question B I am getting Phi at 36.7 and Theta at 63.4

What am I doing wrong here?

Thanks!!!!!!

Just need some verification or a link for more study to answer these questions.

See the picture here: http://www.sellmontana.com/misc/1.jpg

1. The graph of wavelength vs. index of refraction shows that, for dispersion 1, the index of refraction:

A. is greater for longer wavelengths.

B. is less for longer wavelengths.

C. is exactly 1 for all wavelengths.

D. the index of refraction is a nonlinear function of wavelength

My answer is A is this correct?

2. If the dispersion is greater:

A. the variation of index of refraction with wavelength is smaller.

B. the variation of index of refraction with wavelength is greater.

C. the index of refraction does not change with wavelength.

D. the index of refraction is proportional to the reciprocal of the square of the wavelength.

My answer is B is this correct?

A ray of light is reflected off the surface of a transparent material. Under these conditions, angle 2 is?

1 twice the size of angle 1

2 equal to angle 1

3 half the size of angle 1

4 90 degrees

I would have to go with #2... am I correct.

Material 1 has an index of refraction of 1. Material 2 has an index of refraction of 2. Two parallel rays of light pass from material 1 into material 2 at an angle of 45 degrees with respect to the normal of the surface of material 2. Inside material 2, the light rays are?

1. divergent

2. parallel

3. convergent

4. the light rays are reflected, and do not enter material 2

my answer is 2, but not sure.

The INX instruction

1. adds $01 to the value of X.

2. subtracts $01 from the value in X

3. adds $01 to the value in the memory location referred to by X.

4. adds $01 to M and M+1, where M is the memory location referred to by X.

My answer is #1 Is this correct?

The STX instruction stores the contents of the X register in memory, much as the STAA instruction stores the contents of Accumulator A in memory. How many bytes of memory are required to hold the contents of X?

1. one

2. two

3. three

4. four

My answer #4 is this correct?

Accumulator A contains %0000 1111. The C bit contains %1. The RORA instruction is executed twice. The results are:

1. Accumulator A:%1000 0111; C: %1

2. Accumulator A:%1100 0011; C: %1

3. Accumulator A:%1100 0011; C: %0

4. Accumulator A:%0011 1110; C: %0

Answer #3? is this correct? Thanks.

Accumulator A contains %0000 1111. The C bit contains %1. The ROLA instruction is executed twice. The results are?

1. Accumulator A: %0011 1110; C:%0

2. Accumulator A: %0001 1111: C:%1

3. Accumulator A: %0011 1100: C:%0

4. Accumulator A: %0011 1100: C:%1

Answer 3?

The A accumulator contains %1111 0000. The carry bit is set (logic1). The Logical Shift Right instruction (LSRA) is executed. What are the contents of Accumulator A and the C Bit?

1. Accumulator A: %1110 0001: C: %1

2. Accumulator A: %1110 0000: C: %0

3. Accumulator A: %0111 1000: C: %1

4. Accumulator A: %0111 1000: C: %1

Answer #1?

Does anyone have a link to explain this better?

The A Accumulator contains %0000 0000. After the DECA instruction is executed, Accumulator A will contain?

1. % 0000 0000

2. % 0000 0001

3. % 1000 0000

4. % 1111 1111

I know that the Decrement subtracts one from the operand, then overwrite the previous.. we are starting at 0 so a -1 = 255?

so answer 4??? is this correct?

Accumulator B contains %0000 1010. This is EXOR-ed with %0000 1110 by using the EORB instruction. After the instruction has been executed, Accumulator B will contain?

1. 0000 0000

2. 0000 1010

3. 0000 0100

4. 1111 1011

My answer is 1. Is this correct? Thanks.