Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
This is the Exam of Its Not Rocket Science which includes Static Firing of Rocket, Burn Time, Thrust Curve, Total Impulse of Motor, Motor Impulse Designations, Particular Motor, Lower Friction Drag etc. Key important points are: Model Rocket, Average Thrust, Maximum Mass of Rocket, Plum Pudding Model, Atomic Structure, Rutherford’s Scattering Experiment, Large-Ish Styrofoam, Gaseous State, Hydrogen Bromide
Typology: Exams
1 / 6
This page cannot be seen from the preview
Don't miss anything!
St. Vincent College PH 171: It’s Not Rocket Science
The exam consists of 6 questions. The questions may not be worth the same number of points, read the entire exam before beginning work. The more work you show, the more likely it is to receive partial credit in the event of an incorrect final answer.
Problem 1 30
Problem 2 20 Problem 3 10 Problem 4 10
Problem 5 20 Problem 6 10
Total 100
a) (10 pts) How many C11 motors could they use together in one rocket while it still remains legally a “model rocket?” The C11 contains 12.0 g of propellant, has a total mass of 35.5 g, and a total impulse of 9 N·s.
b) (10 pts) What would be the average thrust of all of these motors firing at once, in pounds (if 1 lb = 4.448 N)?
c) (10 pts) Once these motors are assembled together, what is the maximum mass of the rocket itself that could still be a “model rocket” (by the NFPA/state law) or “class 1” (by the FAA). Keep in mind that the regulations apply to the total mass at launch, including the rocket itself and all rocket motors.
a) (10 pts) Given the chemical reaction below, how many hydrogen bromide molecules are formed?
C 10 H 12 + 4Br 2 → C 10 H 8 Br 4 + (?) HBr
b) (10 pts) How many carbon and hydrogen atoms are in the tetraline molecule (which is one of the ingredients of the reaction, not one of the products).
