« previous next »

Author Question: A space probe has an 24.7-m length when measured at rest. What length does an observer at rest ... (Read 74 times)

drink

  • Hero Member
  • *****
  • Posts: 554
on: Jul 28, 2018
A space probe has an 24.7-m length when measured at rest. What length does an observer at rest measure when the probe is going by at a speed of 0.860c?
 a. 25.2 m
  c. 9.19 m
  b. 6.43 m
  d. 12.6 m

Question 2

According to the special theory of relativity, which of the following happens to the length of an object, measured in the dimension parallel to the motion of its inertial frame of reference, as the velocity of this frame increases with respect to a stationary observer?
 a. the length remains constant
  b. the length vanishes to zero when velocity equals half the speed of light
  c. the length increases
  d. the length decreases


ong527

  • Sr. Member
  • ****
  • Posts: 285
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

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?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Osteoporosis. (a) A section through normal spongy bone. (b) A section through a bone with osteoporos Osteoporosis. (a) A section through normal spongy bone. (b) A section through a bone with osteoporos
Movement and Space Movement and Space
Human Memorabilia in Space Human Memorabilia in Space
Portable pulse oximeter and digital probe Portable pulse oximeter and digital probe
Measuring the Weight and Length of an Infant Measuring the Weight and Length of an Infant
An electron is accelerated from rest through a potential difference of 3750 V. It enters a ... An electron is accelerated from rest through a potential difference of 3750 V. It enters a ...
Video: Methods of carbon dioxide transport - carbaminohemoglobin and bicarbonate ions

For a complete list of videos, visit our video library