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pantera1 [17]
3 years ago
15

A child stands between two mirrors with his arms out, perpendicular to the mirrors. One plane mirror is 5 m away from his left h

and and another plane mirror is 7 m away from his right hand. How far apart are the two images produced by the mirrors if the child has an arm span of 0.5 m?A. 2 mB. 12 mC. 12.5 mD. 24.5 m
Physics
1 answer:
Lelu [443]3 years ago
6 0

Answer:

A. 2

Explanation:

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4 years ago
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postnew [5]

Answer:

Distance = 0.738 m

Explanation:

Solution:  

<u> First convert Km/h into m/s.</u>  

75 km/h * 1000 m/km * 1 hr/3600 sec = 20.8333 m/s  

<u>According to third equation of motion: </u>

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<em> Vf= final velocity </em>

<em>Vi= initial velocity</em>

putting values in third equation of motion....

0.2^{2} – 20.8333^{2} = 2 * (-30 * 9.8) * distance

note:

negative sign is due to deceleration

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8 0
3 years ago
Velocity is described by __ and time
klasskru [66]

Answer:

direction and time

Explanation:

4 0
4 years ago
I’m confused on the simplest part, which is what to multiply the 2/5 by to get it to the other side...please help
san4es73 [151]

Answer:

Mass, M = 4.859 Kg

Explanation:

Given the following data;

Radius, r = 0.225 m

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Mathematically, the moment of inertia is given by the formula;

I = ⅖Mr²

Making M the subject of formula, we have;

Cross-multiplying, we have;

2I = Mr²

M = \frac {2I}{r^{2}}

Substituting into the formula, we have;

M = \frac {2*0.123}{0.225^{2}}

M = \frac {0.246}{0.050625}

Mass, M = 4.859 Kg

7 0
3 years ago
What is the difference between a mechanical wave and an electromagnetic wave?
Anon25 [30]

Answer: A  a mechanical wave travels through empty space, while an electromagnetic wave travels through matter.

Explanation: A mechanical wave travels through empty space, while an electromagnetic wave travels through matter. A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.

7 0
3 years ago
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