Question
I've solved Part 2 but need help with Part 1. Please show which equations you've used to solve.
energy, impulse, momentum, the impuse mu rotational kinematics and dynamics, torque, moment of inertia, and conserv ation of energy, momentum, angular momentum, Newton's law of gravitation, gravitational gravitational fields, circular and elliptical orbits, center of gravity, statics, pressure in a fluid, bouyancy, flow rates, the continuity equation, Bernoulli's equation. This study guide is composed entirely of test questions, both multiple choice and long used in the last few years. Answers are on the back page. Please help one another with hint problems, s, but do not hurt one another by giving away solutions! Multiple Choice Questions Q1: Water (p 1000 kg/m) flows from a 3 cm diameter pipe into a 1 cm diameter pipe. Both are horizontal. In the smaller pipe, the velocity of the water is 2.5 m/s. part 1: What is the velocity of the water in the larger pipe? O 0.28 m/s O 0.83 m/s O None of these O 0.38 m/s O 1.25 m/s part 2: Compared to the pressure in the small pipe, the pressure in the large pipe is O greater O the same O less O there is not enough information to tell. 02: Planet X is a perfect sphere with a radius of 4 x 10 m. A 70 kg astronaut standing on the surface feels her weight on planet X to be 600 N. What is the density of planet X? 2.44 x 103 kg/m 3 767 y 103 ka/m3 O 4.20 x 10 kg/m O 8.97 x 10 kg/m
Explanation / Answer
From continuity equation
A1v1 = A2v2
(d1/2)²v1 = (d2/2)²v2
3²×v1 = 1²×2.5
v1 = 2.5/9 = 0.2778 m/s
