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Tamiku [17]
3 years ago
12

Explain how the particles of solids move

Physics
1 answer:
KiRa [710]3 years ago
3 0

Answer:

Matter in a solid state are packed tightly in place and vibrate.

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Define efficiency. class -8 ​
Finger [1]

the state or quality of being efficient.

"greater energy efficiency"

Answer

Efficiency is the ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result.

8 0
2 years ago
Read 2 more answers
A heat engine has three quarters the thermal efficiency of a carnot engine operating between temperatures of 65°C and 435°C if
const2013 [10]

Answer:

The value is  P_e  =  31275.2 \  W

Explanation:

From the question we are told that

   The efficiency of the carnot engine is  \eta

    The efficiency of a heat engine is k =  \frac{3}{4}  *  \eta

    The operating temperatures of the carnot engine is  T_1  =  65 ^oC =338 \ K  to  T_2 = 435  ^oC = 708 \  K

    The rate at which the heat engine absorbs energy is  P =  44.0 kW  = 44.0 *10^{3} \  W

Generally the efficiency of the carnot engine is mathematically represented as

          \eta =  [ 1 - \frac{T_1 }{T_2}  ]

=>       \eta =  [ \frac{T_2 - T_1}{T_2} ]

=>       \eta = 0.3856

Generally the efficiency of the heat engine is

           k  =  \frac{3}{4} * 0.3856

=>        k  = 0.2892

Generally the efficiency of the heat engine is also mathematically represented as

          k  =  \frac{W}{P}

Here W is the work done which is mathematically represented as

        W =  P - P_e

Here P_e  is the heat exhausted

So

       k  =  \frac{P - P_e}{P}

=>    0.2892   =  \frac{44*10^{3} - P_e}{44*10^{3}}

=>   P_e  =  31275.2 \  W

8 0
3 years ago
A virtual image produced by a lens is always
JulijaS [17]
The Answer Is D Because When Uu Magnify Large Items The Image Is Reflected Back To The Magnifying Glass Which Makes The Image Appear In The Back
5 0
3 years ago
Read 2 more answers
A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30° relative to the normal. If the index of
son4ous [18]

Answer:

<h2>35</h2>

Explanation:

According to snell's law which states that the ratio of the sin of incidence (i) to the angle of refraction(n) is a constant for a given pair of media.

sini/sinr = n

n is the constant = refractive index

Since the diver shines light up to the surface of a flat glass-bottomed boat, the refractive index n = nw/ng

nw is the refractive index of water and ng is that of glass

sini/sinr = nw/ng

given i = 30°, nw = 1.33, ng = 1.5, r = angle the light leave the glass

On substitution;

sin 30/sinr = 1.33/1.5

1.5sin30 = 1.33sinr

sinr = 1.5sin30/1.33

sinr = 0.75/1.33

sinr = 0.5639

r = arcsin0.5639

r ≈35°

angle the light leave the glass is 35°

7 0
2 years ago
Which statement describes a digital signal used to store information?
velikii [3]

Answer:

D. It is easy to copy.

Explanation:

It is not B, or A, nor C.

8 0
2 years ago
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