This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark. (a) What is ... (Read 29 times)

Alainaaa8

  • Hero Member
  • *****
  • Posts: 576
on: Jul 28, 2018
A runner in a race takes 2.7 seconds to go from the 40 meter mark to the 70 meter mark. (a) What is the runner's speed? (b) How far would the runner go in 8 seconds if this speed is maintained? (c) How long did it take the runner to cover the first 40 m (assuming the same speed was maintained)?

Question 2

Which is a key difference between electric charges and magnetic poles?
 a. Electric charges can be separated while magnetic poles always occur together as opposite poles of equal strength.
  b. Magnetic monopoles exist but isolated electric charges are never found.
  c. Like electric charges repel but like magnetic poles attract.
  d. An electrically charged rod attracts an electrically neutral object but a magnet does not attract and unmagnetized chunk of iron.
  e. In electricity, unlike charges repel, but in magnetism, unlike poles attract.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fur

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 28, 2018
Answer to Question 1

1 m/s, 9 m, 3.6 s

Answer to Question 2

a


Alainaaa8

  • Member
  • Posts: 576
Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

bbburns21

  • Member
  • Posts: 336
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Every culture has funeral rituals that help its members mark the passing of one of their own and ... Every culture has funeral rituals that help its members mark the passing of one of their own and ...
Race - Ethnicity and U.S. Poverty Race - Ethnicity and U.S. Poverty
Sociologists disagree about the relative significance of race and social class in determining social ... Sociologists disagree about the relative significance of race and social class in determining social ...
OraQuick. A negative result would show a red line at the "C" mark, whereas a positive ... OraQuick. A negative result would show a red line at the "C" mark, whereas a positive ...
A bus starts from restat a station and accelerates at a rate of 2 m/s^2 for 15 seconds. It then runs A bus starts from restat a station and accelerates at a rate of 2 m/s^2 for 15 seconds. It then runs
Video: Cell mediated immune response to a viral infection Animation

For a complete list of videos, visit our video library