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laiz [17]
2 years ago
8

Which equation can be used to calculate the normal force on an object if you know the speed of the object, the coefficient of ki

netic friction, and the force of kinetic friction on the object?
Physics
1 answer:
tino4ka555 [31]2 years ago
3 0

Answer:

D

Explanation:

The friction force is the weight force times the coefficient of friction. So diving by the coefficient gives you the weight force which is equivalent to the normal force.

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What is most likely the author’s motive for writing the article?
Salsk061 [2.6K]

Answer: Option (d) is the correct answer.

Explanation:

Article's help people know about the advantages or disadvantages of the product or topic for which it is written.

Basically an article provides an overall scenario about a situation or thing so that readers can decide themselves whether they are in favor or against the thing on which article has been written.

Therefore, we can conclude that out of the given options, to get the reader to understand the two types of signals is most likely the author’s motive for writing the article.

4 0
3 years ago
Read 2 more answers
In the experiment, a meter is hooked up to a speaker to monitor the amplitude of the received sound. Suppose the background sign
FrozenT [24]

Answer:

The answer is "15.38\%"

Explanation:

Background= 13 \ mv\\\\

corrected signal= 91 \ mv-13\ mv= 78\ mv\\\\

with attenuator=25\ mv-13\ mv= 12\ mv\\\\

\to \frac{p_t}{p_i}=\frac{12}{78}\times 100= 15.38\%

4 0
3 years ago
An internal combustion engine uses fuel, of energy content 44.4 MJ/kg, at a rate of 5 kg/h. If the efficiency is 28%, determine
Fudgin [204]
Efficiency =  Power Output / Power Input

Power Input = Rate of Energy input = 44.4 MJ/kg * 5 kg/h

 = 222 MJ/h

But 1 hour = 3600seconds

222 MJ/h = 222 MJ/3600s =  0.061667 MW              J/s = Watts

Power input = 0.061667 MW = 61 667 W

From  Efficiency =  Power Output / Power Input

   28% =  Power Output / 61667

   Power Output = 0.28 * 61667

   Power Output = 17266.76 W
 
  Power Output = 17 267 W

 Rate of heat Rejection = Power input - Power output

                                        = 61667 - 17267 = 44400 W

Rate of heat Rejection = 44 400 W.


C- Copyright.
5 0
3 years ago
Consider a perfectly reflecting mirror oriented so that solar radiation of intensity i is incident upon, and perpendicular to, t
podryga [215]
The answer is Frad<span> = 2IA/c.</span>
4 0
3 years ago
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Helppp!!! what's the answer to this??
riadik2000 [5.3K]

Answer:

(b)

Explanation:

The voltage always lags the current by 90°, regardless of the frequency.

4 0
3 years ago
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