« previous next »

Author Question: A rocket engine consumes 450 kg of fuel per minute. If the exhaust speed of the ejected fuel is 5.2 ... (Read 76 times)

Lobcity

  • Hero Member
  • *****
  • Posts: 524
on: Jul 28, 2018
A rocket engine consumes 450 kg of fuel per minute. If the exhaust speed of the ejected fuel is 5.2 km/s, what is the thrust of the rocket?
 a. 42 kN
  b. 39 kN
  c. 45 kN
  d. 48 kN
  e. 35 kN

Question 2

An astronaut outside a spaceship hammers a loose rivet back in place. What happens to the astronaut as he swings the hammer?
 a. Nothing. The spaceship takes up the momentum of the hammer.
  b. He moves away from the spaceship.
  c. He moves towards the spaceship.
  d. He moves towards the spaceship as he pulls the hammer back and moves away from it as he swings the hammer forward. e. He moves away from the spaceship as he pulls the hammer back and moves toward it as he swings the hammer forward.


miss_1456@hotmail.com

  • Sr. Member
  • ****
  • Posts: 289
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

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.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

The bore and stroke of pistons are used to calculate an engine’s displacement. The bore and stroke of pistons are used to calculate an engine’s displacement.
An engine will not run if the air–fuel mixture is either too rich or too lean. An engine will not run if the air–fuel mixture is either too rich or too lean.
A pump decal indicating that the biodiesel fuel is ultra-low-sulfur diesel (ULSD) and must be used ... A pump decal indicating that the biodiesel fuel is ultra-low-sulfur diesel (ULSD) and must be used ...
If the needle drops 1 or 2 inches Hg from the normal reading, one of the engine valves is burned or ... If the needle drops 1 or 2 inches Hg from the normal reading, one of the engine valves is burned or ...
A single overhead camshaft engine with a timing belt that also rotates the water pump. A single overhead camshaft engine with a timing belt that also rotates the water pump.
A typical peak-and-hold fuel-injector waveform. Most fuel injectors that measure less than 6 ohms ... A typical peak-and-hold fuel-injector waveform. Most fuel injectors that measure less than 6 ohms ...
Video: Basic rhythm - control centers in medulla oblongata, spirograph and normal tidal cycle

For a complete list of videos, visit our video library