Yours Truly

A boat starts with its propeller at rest. The driver guns the motor, accelerating the propeller to spin at a rate of 200 radians per second. If it takes 50 revolutions of the motor to rev up to this velocity, what is the angular acceleration of the propeller?

A bullet fired from the muzzle of a rifle initially rotates with an angular velocity of 2200 radians/sec. If the bullet is slowed by friction and rotates through 480 revolutions during its 1.4 seconds of flight, what is the angular acceleration of the bullet?

The rope passes over an ideal pulley so the mass m2 is suspended in air. The plane is inclined at an angle of 36.9 degrees. Use conservation of energy to find how fast crate m2 is moving after m1 has traveled a distance of 1.4 m along the incline, starting from rest. The mass of m1 = 12.4 kg and the mass of m2 = 16.3 kg.

Any help is greatly appreciated!!

with respect to the horizontal. Ignore air resistance.

a) find the speed of the ball when it hits the ground in terms of h, v, g, and Q.

b) For what value(s) of Q is the speed of the ball greatest when it hits the ground?

Any help is greatly appreciated!

Ignore air resistance.

a) Calculate the work done by gravity on the skier and the work done by the normal force on the skier.

b) If the slope is not frictionless so that the skier has a finanl velocity of 10 m/s, calculate the work done by gravity, the work done by the normal force, the work done by friction, the force of friction (assuming it is constant), and the coefficient of friction.

Any help is greatly appreciated!!

specifically?

1) What is the equation of the line of symmetry of a relation and its inverse?

2) When solving a system of two equations with two unknowns, what is it you are actually finding?

3) What is the difference between real roots and imaginary roots when graphing a polynomial?

4) Explain why a polynomial of odd degree must cross the x-axis at least once.

5) How do you determine the possible number of possible real roots that a polynomial can have?

6) Why do the imaginary roots come in pairs? Be specific.

Thanks so much!

1) Major axis = 4, minor axis = 2, center (0, 2)

2) Foci of (7, 0) and (-7, 0) and endpoints on the vertical axis of (0, 7) and (0, -7)

If you could kind of explain your work, that would be awesome, because I have no idea how to even begin with this.

Thanks! :)

1) Major axis = 4, minor axis = 2, center (0, 2)

2) Foci of (7, 0) and (-7, 0) and endpoints on the vertical axis of (0, 7) and (0, -7)

If you could kind of explain your work, that would be awesome, because I have no idea how to even begin with this.

Thanks! :)

Vertex (9, -1)

Focus (4, -1)

1) 5, -3

2) 2 + i, 2- i

3) 2, 4 + i, 4 - i

4) 3 + i, 3 - i, i, -i

i = imaginary number i

I know how to do these in principle but I'm getting them all wrong..

Thanks!

The yahoo answers formatting wouldn't let me make matrices so here's the problem:

http://tinypic.com/r/160wm6t/5

I know the answer is (13, -5), but I'm having trouble getting it..

Thanks!

I never learned this?

Algebra 2

And also, how would you put log[base5] (x+2) = 12 into exponential form??

Thanks so much!