« previous next »

Author Question: An unfueled 1 000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of ... (Read 603 times)

123654777

  • Hero Member
  • *****
  • Posts: 585
on: Jul 28, 2018
An unfueled 1 000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20-s burn.. If the rocket, initially at rest, moves at 160 m/s after the burn, what impulse is experienced by the rocket sled?
 a. 1.1  105 kgm/s b. 1.6  105 kgm/s
  c. 1.5  105 kgm/s d. 1.9  105 kgm/s

Question 2

A rocket of total mass M and with burnout mass 0.20M attains a speed of 3 400 m/s after starting from rest in deep space. What is the exhaust velocity of the rocket?
 a. 6.8E+2 m/s
  b. 2.1E+3 m/s
  c. 1.7E+4 m/s
  d. 2.2E+3 m/s
  e. 1.1E+3 m/s


essyface1

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

b


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Experimental evidence of the effect of allelochemicals on plant production. Experimental evidence of the effect of allelochemicals on plant production.
Does this child have legs of different lengths or scoliosis? Look at the level of the iliac crests a Does this child have legs of different lengths or scoliosis? Look at the level of the iliac crests a
Upper-Level Maps Upper-Level Maps
Elements of Experimental Design. Elements of Experimental Design.
How much the temperature will rise depends on many factors that affect the level of GHG emission How much the temperature will rise depends on many factors that affect the level of GHG emission
Projections of global temperature depend heavily on the level of future greenhouse gas emissions Projections of global temperature depend heavily on the level of future greenhouse gas emissions
Video: Pneumonia Animation

For a complete list of videos, visit our video library