09/18/13

What math subject is after this?
What math subject comes after Fourier Analysis for physics and electrical engineering majors?
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09/18/13

Please help me with this math problem?
Find a fundamental matrix for x'=(-3/4, 1/8, 1/2, -3/4)x. (2x2 matrix, -3/4 and 1/8 on the left, 1/2 and -3/4 on the right. The eigenvalues are -1 and -1/2. I got -7/4a+1/2b=0, 1/8a-7/4b=0 for the... more
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09/18/13

Please help me with this math problem?
Find a fundamental matrix for x'=(3, 2, -2, -2)x. (2x2 matrix, 3 and 2 on the left, -2 and -2 on the right.)
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09/17/13

Please help me with this math problem?
Find the critical value or values of α where the qualitative nature of the phase portrait for x'=(alpha, -1, 10, -4)x changes. (this is 2x2 matrix, alpha and -1 on the left, 10 and -4 on the right,... more
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09/17/13

Please help me with this math problem?
Find the critical value or values of alpha where the qualitative nature of the phase portrait for x'=(2, alpha, -5, -2)x changes. (this is 2x2 matrix, 2 and alpha on the left, -5 and -2 on the right.) more
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09/17/13

Please help me with this math problem?
Find the eigenvalues in terms of α for x'=(5/4, alpha, 3/4, 5/4)x. (this is 2x2 matrix, 5/4 and alpha on the left, 3/4 and 5/4 on the right. I got up to r^2-(5/2)r+25/16-(3/4)alpha=0, what's next?)
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09/17/13

Please help me with this math problem?
Find the eigenvalues in terms of α for x'=(0, 1, -5, α)x. (this is 2x2 matrix, 0 and 1 on the left, -5 and alpha on the right. I got (0-r)(α-r)+5=0, what's next?)
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09/16/13

Find the eigenvalues?
Find the eigenvalues in terms of α for x'=(α, -1, 1, α)x. (this is 2x2 matrix, α and -1 on the left, 1 and α on the right.)
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09/14/13

Please help me with this math problem?
Express the general solution of x'=(1, 2, 3, 0, 1, 2, 0, -2, 1)x in terms of real-valued functions. (this is 3x3 matrix, 1, 2, 3 on the left, 0, 1, 2 in the middle, 0, -2, 1 on the right.) Please... more
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09/13/13

Please help me with this math problem?
Express the general solution of x'=(2, 9/5, -5/2, -1)x in terms of real-valued functions. (this is 2x2 matrix, 2 and 9/5 on the left, -5/2 and -1 on the right. I know that the roots are 1/2+3/2i... more
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09/11/13

Please help me with this math problem?
Express the general solution of x'=(3, 4, -2, -1)x in terms of real-valued functions. (this is 2x2 matrix, 3 and 4 on the left, -2 and -1 on the right.)    
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09/10/13

What's after this math subject?
What math subject comes after complex analysis and numerical analysis for physics and electrical engineering majors? Also, do vocational schools offer bachelor's degree in electrical engineering... more
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09/10/13

Please help me with this math problem?
Solve x'=(1, 0, -1, 1, 2, 1, 2, 2, 3)x, x(0)=(2, 0, 1). (this is 3x3 matrix IVP problem, 1, 0, -1 on the left, 1, 2, 1 in the middle, 2, 2, 3 on the right.)   I know that the 3 roots are 1, 2, 3.... more
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09/09/13

Solve the puzzle?
  ABCDxD=DCBA
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09/09/13

How to factor this?
  -x^3+6x^2-11x+6=0
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09/08/13

Can you solve this?
Solve x'=(5, 3, -1, 1)x, x(0)=(2, -1).   I know that the eigenvalues are 2, 4. And the eigenvector for 2 is (1, 3) and for 4 is (1, 1). But how do I find the numbers in front of these 2... more
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09/08/13

Find the general solution?
Find the general solution of x'=(1, 1, 2, 1, 2, 1, 2, 1, 1)x. (this is a 3x3 matrix, 1, 1, 2 on the left, 1, 2, 1 in the middle, 2, 1, 1, on the right, please show your work step by step.)
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09/06/13

How to factor this?
x^2+xi-i-x=0  
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09/05/13

Find the final velocity?
  An automobile with an initial velocity of 4.30 m/s accelerates uniformly at the rate of 3.00 m/s^2. Find the final velocity and the displacement after 5.00 s.
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09/05/13

What will be its instantaneous velocity?
A row boat, starting from rest, takes 10 seconds to travel 28 meters. If the boat maintains a uniform acceleration, what will be its instantaneous velocity at the end of the 10 second period?
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09/05/13

How much time?
A pickup truck moving at 28 m/s must come to a stop in a distance of 191 meters to avoid hitting a boulder that has fallen onto the road. How much time does the driver have to avoid an accident?
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09/05/13

How far does it travel?
A car accelerates uniformly from rest to a final speed of 19 m/s in 10 seconds. How far does it travel during this period of acceleration?
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09/05/13

How long will it take?
A child rolls a ball up a hill at 4.24 m/s. If the ball experiences an acceleration of -1.32 m/s^2, how long will it take for the ball to have velocity of 2.23 m/s down the hill?
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09/04/13

How high does it go?
A ball is thrown up at velocity of 50.0 m/s. Consider no air resistance. a) How much time does it take to reach its maximum height? b) How high does it go? c) How fast is it going when it... more
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09/04/13

What distance?
A can of tuna is dropped from a building. If the can takes 3.2 seconds to strike the ground, what distance did it fall?
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