This topic contains a solution. Click here to go to the answer

Author Question: A pulsar (a rotating neutron star) emits pulses at a frequency of 0.40 kHz. The period of its ... (Read 66 times)

james9437

  • Hero Member
  • *****
  • Posts: 568
A pulsar (a rotating neutron star) emits pulses at a frequency of 0.40 kHz. The period of its rotation is
 
  A) 2.5 ms.
  B) 2.5 s.
  C) 0.025 s.
  D) 0.25 s.
  E) 25 ms.

Question 2

A train traveling at 50. km/h approaches another train moving toward the first at 90. km/h. If they are 35. km apart (on a straight track) how long does it take before they meet?
 
  A) 15. min
  B) 55. min
  C) 30. min
  D) 45. min
  E) 25. min



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Briannahope

  • Sr. Member
  • ****
  • Posts: 364
Answer to Question 1

A

Answer to Question 2

A



james9437

  • Hero Member
  • *****
  • Posts: 568
Both answers were spot on, thank you once again




 

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.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

For a complete list of videos, visit our video library