« 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 78 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?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

The role of the liver in fuel supply to the blood. The role of the liver in fuel supply to the blood.
A crack in an exhaust manifold is often not visible. A crack in the exhaust manifold upstream of the ... A crack in an exhaust manifold is often not visible. A crack in the exhaust manifold upstream of the ...
Engine oil pressure is used to switch cam lobes on a VTEC system. Engine oil pressure is used to switch cam lobes on a VTEC system.
To help locate how far the engine is being rotated, the technician is removing the distributor cap ... To help locate how far the engine is being rotated, the technician is removing the distributor cap ...
An OBD-II active test. The PCM opens the EGR valve and then monitors the MAP sensor and/or engine ... An OBD-II active test. The PCM opens the EGR valve and then monitors the MAP sensor and/or engine ...
The fuel tank pressure sensor (black unit with three wires) looks like a MAP sensor and is usually ... The fuel tank pressure sensor (black unit with three wires) looks like a MAP sensor and is usually ...
Video: Stimulus (introduction)

For a complete list of videos, visit our video library