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DerKrebs [107]
3 years ago
13

A student bangs a brick at the head of a table. Three students are positioned equal distance from the head with their hands on t

he table. What conclusion can be made about how they each will feel the vibrations?
Physics
1 answer:
iris [78.8K]3 years ago
5 0

Explanation:

that the people closer too the head of the table will feel more vibrations than the people at the end of the table. since the vibrations will slow down as they travel farther down the table

Hope this helps!!

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What is a gravitational field and how its strength be measured
Yakvenalex [24]
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F= \frac{GM}{r^2}  m
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A possible way to measure the intensity of a gravitational field is by measuring the acceleration a of the object immersed in this field. In fact, for Newton's second law we have:
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5 0
3 years ago
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8 0
3 years ago
Read 2 more answers
A football is kicked from a tee at 12 m/s at 72° above the horizontal. What is the flight time of the football? __s
Ierofanga [76]
2.3 seconds    

Ignoring air resistance, the flight time is merely a function of gravity and vertical velocity. The vertical velocity will be the initial velocity multiplied by the sine of the angle above the horizon. So: 

 V = sin(72)*12 m/s 

 V = 0.951056516 * 12 m/s 

 V = 11.4126782 m/s   

 Gravitational acceleration is 9.8 m/s, so divide the vertical velocity by gravitational acceleration to get how long it takes for the ball to reach its apex. 

 11.4126782 m/s / 9.8 m/s^2 = 1.164559 s   

 And the old saying "What goes up, must come down" really applies here. And conveniently, it's also symmetric, in that the time it takes to fall will match the time it takes to reach its apex. So multiply the time by 2.  



1.164559 s * 2 = 2.329117999 s   

 Rounding the result to 2 significant figures gives 2.3 seconds.
8 0
2 years ago
Anybody please help me with these questions... I really need help...
zhannawk [14.2K]
Remember, Your electric field lines drawn from positive charge (protons) and goes to negative charge (electron)

So, Your Answers would be:
15) B) Positive

16) A) Negative 

17) B) Positive

18) A) Negative 

19) B) Positive 

20) B) Positive 

Hope this helps!
6 0
3 years ago
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