Las fuerzas \( \mathbf{P} \) y \( \mathbf{Q} \) se aplican al componente de una pieza de ensamble de avión como se muestra en la figura No. 2 . Si se sabe que la pieza de ensamble se encuentra en equilibrio, y que las magnitudes de las fuerzas ejercidas sobre las barras \( A \) y \( B \) son \( F_{A}=750 \) lb y \( F_{B}=400 \mathrm{lb} \), dibuje el diagrama de cuerpo libre y detrrmine las magnitudes de \( \mathbf{P} \) y \( Q \).

What does the author want to communicate about Bud's feelings about family through the scene with Billy?

b) Two groups A and B each consists of 100 people who have a disease. A serum is given to group A but not group B (a control group); otherwise the two group are treated identically. It is found that in groups A and B, 75 and 65 people respectively recover from the disease. Test the hypothesis that the serum helps to cure the disease using the \( 0.01 l \) evel of significance. Find the P-Value of the test.

Find the five remaining trigonometic functions of \( \theta \) \[ \sec \theta=\frac{3}{2}, \sin \theta<0 \]

Write the following expression as a single trigonometric function or a power of a trigonometric function. \( \sec ^{2} x-1 \)

(a) In an ideal constant pressure cycle, the overall volume ratio of the cycle is \( 9: 1 \). The volume ratio of the adiabatic compression is \( 6: 1 \). The pressure, volume and temperat of the air at the beginning of the adiabatic compression are \( 150 \mathrm{kN} / \mathrm{m}^{2}, 0.095 \mathrm{~m}^{3} \) and \( 25^{\circ} \mathrm{C} \) respectively. Taking \( \gamma=1.4 \) and \( \mathrm{Cp}=1.005 \mathrm{~kJ} / \mathrm{kgK} \), determine the thermal efficiency of the cycle.