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2 years ago

7

I NEEED WITH EXPLANATION PLEASE

1 answer:

Delicious77 [7]2 years ago

5 0

Answer:

20

Explanation:

u=0

a=2m/s^2

s=100m

V=?

v^2=u^2+2as

V^2=0^2+2(2*100)

V^2=400

v=root400

V=20

brainleast please! !!

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An astronaut is moving in space when a big explosion occurs about 50 meters behind him. How will the astronaut come to know abou

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Answer:

The correct answer is B.

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2 years ago

A flute player hears four beats per second when she compares her note to a 523 HzHz tuning fork (the note C). She can match the

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Answer:

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As per the question:

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Now,

The initial frequency can be calculated as:

$\Delta f = f - f_{i}$

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when

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when

$f_{i} = f - \Delta f = 523 - 4 = 519 Hz$

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The route followed by a hiker consists of three displacement vectors A with arrow, B with arrow, and C with arrow. Vector A with

kotykmax [81]

Answer:

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Explanation:

If we express all of the cordinates in their rectangular form we get:

A = (1404.77 , 655.06) m

$B = A + ( -D_{B} *sin(41) , -D_{B} * cos(41) )$

$C = A + B + ( -D_{C} *cos(20) , D_{C} * sin(20) )$

Since we need C to be (0,0) we stablish that:

$C = (0,0) = A + B + ( -D_{C} *cos(20) , D_{C} * sin(20) )$

That way we make an equation system from both X and Y coordinates:

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Replacing values:

$1404.77 - D_{B}*sin(41) - D_{C}*cos(20) = 0$

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With this system we can solve for both Db and Dc and get the answers to the question:

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3 years ago