Author Question: A steel bridge is 1000 m long at -20C in winter. What is the change in length when the temperature ... (Read 97 times)

saraeharris

  • Hero Member
  • *****
  • Posts: 546
A steel bridge is 1000 m long at -20C in winter. What is the change in length when the temperature rises to 40C in summer? The average coefficient of linear expansion of this steel is 11  10-6 K-1.
 
  A) 0.33 m
  B) 0.44 m
  C) 0.55 m
  D) 0.66 m

Question 2

A 10-gram wire that is 6.0 m long is under tension. When a transverse wave of frequency 280 Hz travels along the wire, its wavelength is 0.60 m,and its amplitude is 8.4 mm.
 
  How much time does it take for a crest of the transverse wave to travel the length of the wire? A) 36 ms
  B) 31 ms
  C) 40 ms
  D) 44 ms
  E) 49 ms



stallen

  • Sr. Member
  • ****
  • Posts: 336
Answer to Question 1

D

Answer to Question 2

A



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

For a complete list of videos, visit our video library