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shutvik [7]
2 years ago
13

Greg is in a bike race. At mile marker four (out of ten), his speed was measured at 13.5 mph.

Physics
2 answers:
Andreyy892 years ago
8 0

It is the instantaneous speed of the bike rider.

Explanation:

At the mile marker, the measured speed gives the instantaneous speed of the bike rider.

The instantaneous speed is speed measured at a precise or instance of time.

 Speed is the rate of change of distance with time. It is a scalar quantity that only shows magnitude with no reference to direction.

  Velocity is the displacement divided by time. It has both magnitude and directions.

Average speed is measured over a period of time as the distance increases from the starting point.

From this, we can see that 13.5mph is the instantaneous speed of the bike rider.

learn more:

Instantaneous velocity brainly.com/question/2234298

#learnwithBrainly

Leya [2.2K]2 years ago
8 0

Answer:

B: it is the instantaneous speed of the bike rider.

Explanation:

keep it going....

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Answer:

If the observer is stationary but the source moves toward the observer at a speed vs, the observer still intercepts more waves per second and the frequency goes up. This time it is the wavelength of the wave received by the observer that is effectively shifted by the motion, rather than the speed.

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2 years ago
Which statement best describes the difference between a substance with a pH of 3.0 and a substance with a pH of 6.0?
satela [25.4K]

The statement best describes the difference between a substance with a pH of 3.0 and a substance with a pH of 6.0 is - The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.

pH is the scale or measure for the substance about its acidic or basic strength. It ranges from 0 to 6.9 which is acidic and 7.1 to 14 which is basic.

Acidic substance has high concentration of Hydrogen ions whereas, basic substance has low concentration of hydrogen ions, however for the OH⁻ ions it is reverse.

  • Concentration of hydrogen ions is inversely related to its pH
  • More hydrogen ions present, the lower the pH
  • The fewer hydrogen ions, the higher the pH We know,

pH = -log(H^{+}) then,  

=> 3 = -log (H^{+})

=> H^{+} =  (for pH = 3)  

=> pH = -log(H^{+})

=> 6 = -log (H^{+})

=> H^{+} = 10^{-6} (for pH = 6)

 Thus, The substance with the lower pH (3) has 1000 times as many hydrogen ions per volume of water.

Learn more about pH scale:

brainly.com/question/1596421

7 0
3 years ago
Please help thank you
Valentin [98]
Diagram A is the correct diagram
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Landon attends an early childhood program that is located at a community center which also runs an adult care program.
Ira Lisetskai [31]
Good for Landon. What’s the question?
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The graph shows the federal budget from 1980 to 2010. In which period did the federal budget show the greatest deficit?
kodGreya [7K]

Answer:

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Explanation:

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