The mass is 8.5 kg
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A She can run the same distance in a shorter amount of time.
Explanation:
Jill can achieve a higher average speed than Jenna if she runs the same distance in a shorter amount of time.
Speed is a physical quantity that deals with the rate of change of distance with time:
Speed =
The distance traveled is the length of the path covered and time taken is the duration.
To achieve a higher speed, it would be desired to have a lower time and the distance covered steadily increasing or staying the same.
To achieve a low speed, the distance must be decreasing and time increasing.
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Speed brainly.com/question/10435836
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Explanation:
Let be the airspeed.
Let be the cross wind speed.
We know that,ground speed is the vector sum of airspeed and cross wind speed and airspeed is perpendicular to cross wind speed.
If and are two perpendicular vectors,the resultant vector has the magnitude
Given,
So,the ground speed is
Answer:
In contrast, wind turbines produce no greenhouse gases when generating electricity. We should note that both noise and visual pollution are environmental disadvantages of wind turbines. However, these factors don't have a negative impact on the earth, water table or the quality of the air we breathe.