« previous next »

Author Question: What mass ratio is required to launch a rocket from the surface of Mars (escape velocity = 5.0 km/s) ... (Read 79 times)

captainjonesify

  • Hero Member
  • *****
  • Posts: 543
on: Jul 27, 2018
What mass ratio is required to launch a rocket from the surface of Mars (escape velocity = 5.0 km/s) if its engines produce an exhaust velocity of 3.0 km/s?
 
  A) 1.8
  B) 5.3
  C) 6.9
  D) 7.4

Question 2

A cylinder, of radius 8.0 cm, rolls 20. cm in 5.0 s. Through what angular displacement does the cylinder move in this time?
 
  What will be an ideal response?


blazinlyss

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

143


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind
Viking Mars Lander Viking Mars Lander
Surface Water Parsing Surface Water Parsing
This typical die grinder surface preparation kit includes the air-operated die grinder and a ... This typical die grinder surface preparation kit includes the air-operated die grinder and a ...
Flow chart for the diagnosis of hepatitis C. Hepatitis C reporting using the signal-tocutoff ratio. Flow chart for the diagnosis of hepatitis C. Hepatitis C reporting using the signal-tocutoff ratio.
One surface barrier to infection One surface barrier to infection
Video: Five phases of cardiac cycle & Atrial contraction

For a complete list of videos, visit our video library