## A spaceship leaves the space station with an acceleration of 15 ft/s2. After 3 minutes the engines turn off and the acceleration is 0 ft/s2. What is the average velocity of the spaceship?

(A)81,100 ft/s

(B) 1,350 ft/s

(C) 243,000 ft/s

(D) 2,700 ft/s

A piston inside a cylinder undergoes an isentropic compression with the following values.

$latex p_1= 4.57 \frac{N}{cm^2}$

$latex p_2= 34.07 \frac{N}{cm^2}$

$latex V_1 = 257 cm^3$

If the specific heat ratio (k) is 1.4, What is the compressed volume?

(A) 61.2cm^{3}
(B) 30.5cm^{3}
(C) 90.4cm^{3}
(D) 257cm^{3}

**Correct Answer: B**

What is the natural frequency of a body that has a period of oscillation of 2.7 seconds?

(A) 2.7 s (B) 0.75 s (C) 2.33 s (D) 4.65 s

**Correct Answer: C**

Which of the following are not an intensive property? Pressure Velocity Volume Density Kinetic Energy

（A）I, II & III （B） IV & V （C） I, II & IV （D） III & V

**Correct Answer: D**

### More PE Exam Questions

- 1What cycle is the most efficient?
- 2
The magnitude(N) of the resultant of the three coplanar forces, A, B, and C, is most nearly:

- 3
A heavy roller is held in equilibrium on a frictionless Plane AB by the force F, as shown. Which diagram correctly shows a vector polygon of the forces acting on the roller?

- 4A plane intercepts the coordinate axis at (4,6,10). What are the Miller indices for this plane?
- 5
A tube that is 10 feet long and 2 feet in diameter is placed in an air stream. The flow of the air is at a speed of 15 ft/s and is perpendicular to the long axis of the tube. If the coefficient of drag is 1.3 and the density of air is 0.075 lbm/ft

^{3}What is the drag on the cylinder?