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saw5 [17]
3 years ago
11

To see her full heiht, a child that is 1 meter tall needs a mirror that is at least A) 033 m tall. 6) 050 m tall C) 075 m tall.

D) 1 m tall. E) depends on how far the child is from the mirror
Physics
1 answer:
svlad2 [7]3 years ago
7 0

Answer:

0.50 m tall

Explanation:

To see the full height of the child the height of the mirror should be half of the height of the child

As it id given that the height of the child is 1 meter so the height of the mirror is =\frac{height\ of\ child}{2}=\frac{1}{2}=0.5m

As it is a rule that to see the full any object the height of the mirror should be half of the height of the object

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A vertical spring with a spring constant of 420 N/m is mounted on the floor. From directly above the spring, which is unstrained
mixas84 [53]

Answer:

19.53 cm

Explanation:

The computation of the height is as follows:

Here we applied the conservation of the energy formula

As we know that

P.E of the block = P.E of the spring

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where

m = 0.15

g = 9.81

k = 420

x = 0.037

So now put the values to the above formula

(0.15) (9.81) (h) = 1 ÷2 × 420 × (0.037)^2

1.4715 (h) = 0.28749

h = 0.19537 m

= 19.53 cm

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3 years ago
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En un m.A.S. La amplitud tiene un valor de 10 centimetros y el periodo es de 2 segundos calcular el valor de la velocidad de 0.8
Ivanshal [37]

Answer:

v1=18.46m/s

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Explanation:

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A=10cm\\T=2s

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x=Acos(\omega t)\\

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\omega=\frac{2\pi}{T}=\frac{2\pi}{2}=\pi

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