2 years ago

Which of the following is an exa example of a wave

Physics

1 answer:

maria [59]2 years ago

6 0

Longitudinal waves

Transverse waves

Electromagnetic Waves

Water waves

Rope waves

LIght Waves

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3 years ago

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If all blocks are the same density, are they all the same material?

schepotkina [342]

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Which explains why more energy is released in nuclear reactions then in chemical reactions

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3 years ago

A(n) 30 kg boy rides a roller coaster. The acceleration of gravity is 9.8 m/s 2 . With what force does he press against the seat

forsale [732]

Answer:

Force, F = 187.42 N

Explanation:

It is given that,

Mass of boy, m = 30 kg

Acceleration due to gravity, $a=9.8\ m/s^2$

Radius of curvature of the roller coaster, r = 15 m

Speed of the car, v = 7.3 m/s

The force acting on the boy are force of gravity and the centripetal force. The net force acting on him is as follows :

$F=mg-\dfrac{mv^2}{r}$

$F=m(g-\dfrac{v^2}{r})$

$F=30\times (9.8-\dfrac{(7.3)^2}{15})$

F = 187.42 N

So, he press against the seat with a force is 187.42 N. Hence, this is the required solution.

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3 years ago

We see a bolt of lightning and 4 s later we hear the thunderclap. If the speed of

Alex73 [517]

Answer:

i guess 0.8 miles away

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mathematically:-

speed is given in question

Time is given

and we have to find distance

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we get answer

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1 year ago