Compare and contrast briefly the processes of nuclear fusion in the Sun, and on Earth in fusion bombs and in fusion reactors such as JET and ITER. Explain how the necessary temperature and density conditions for ignition and continued fusion are established in each of the three cçases.

What is the last thing you should do when solving a problem? Explain.

d(x) P)? (Р) Q1: Proof that: dt m

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K Solve for the indicated variable. Assume all variables are positive. QV₁ QV₂ T. L T₂ ; for T₁ (Simplify your answer.)

4. Consider again the situation given in Problem 1. (a) Find the center-of-mass of the system made up of m, and m,, taking the origin to be at P. (b) Draw a free body force diagram with the all of the mass (m, + m,) concentrated at this center-of-mass position. (c) Find the torque about P due to (m, + m2) concentrated at this center of mass position. How does this result compare to (d) in Problem 1? [We will make use of this technique often for certain types of future problems.]

Determine F1 and the angle of Theta. If the magnitude of the resultant force acting on the eyebolt is 800N and its direction measured clockwise from the positive x axis theta=30.

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An airplane takes off from Masipag runway which has a bearing of N 28° E. After flying for 3 miles, the pilot turns 90° and heads toward the northwest. After the plane goes 4 miles in this direction, what bearing has the plane from the terminal?

Consider three vectors: What is the result of 2A. (B-3C)? What is the result of A A+B B + C. C? . A.A+B B+C . C = || A = (9.71) î+ (1.12) Ĵ B = (7.28) + (5.54); C = (-2.95) + (-14.7);