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Molodets [167]
3 years ago
12

If the maximum time between the emitted and received pulse is 1/ 10 second, what is the farthest distance you could measure with

the sensor? (This question requires units.)
Physics
1 answer:
Allisa [31]3 years ago
7 0

Answer:

d = 2,998 10⁷ m

Explanation:

The speed of an electromagnetic wave is the speed of light

      c = 2,998 10⁸ m / s

This speed is in a vacuum, when the light is in a material medium, its speed is lower than this, even when the order of magnitude is maintained.

Since the speed of a wave is constant, we can use the kinematic relationship

       c = d / t

       d = c t

Let's calculate

      d = 2,998 108 0.1

      d = 2,998 10⁷ m

in the vacuum or air

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An electric pump rated at 1000W, takes 16 seconds to pump 100 kg of water out to a tank at a height of 10 m. what is the efficie
TEA [102]

Answer:

\boxed{\sf Efficiency \ of \ the \ motor = 62.5 \ \%}

Given:

Input Power (\sf P_i)= 1000 W

Mass (m) = 100 kg

Height (h) = 10 m

Time (t) = 16 s

To Find:

Efficiency of the motor

Explanation:

\boxed{ \bold{Output  \: power  \: (P_o)= \frac{mgh}{t}}}

\sf \implies P_o =  \frac{100 \times 10 \times 10}{16}

\sf \implies P_o =  \frac{10000}{16}

\sf \implies P_o =  \frac{ \cancel{16} \times 625}{ \cancel{16}}

\sf \implies P_o = 625 \: W

\boxed{ \bold{Efficiency = \frac{Output \ Power \ (P_o)}{Input \ Power \ (P_i) } \times 100}}

\sf  \implies Efficiency  =  \frac{625}{10 \cancel{00}}  \times  \cancel{100}

\sf  \implies Efficiency  =  \frac{625}{10}

\sf  \implies Efficiency  = 62.5  \: \%

\therefore

Efficiency of the motor = 62.5 %

5 0
3 years ago
which of the following instruments is used to measure air pressure? a. thermometer b. barometer c. anemometer d. hygrometer
Kryger [21]
The correct answer is B. barometer

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8 0
3 years ago
Read 2 more answers
Can someone help me
Nady [450]
The answer is D 10x21
7 0
3 years ago
Speed equals distance divided by? <br> a. time<br> b. velocity<br> c. size<br> d. motion
lukranit [14]
I believe it's A. time.
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3 years ago
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FinnZ [79.3K]
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Hope this helps!
3 0
3 years ago
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