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zalisa [80]
3 years ago
14

A straight line can represent a _____-dimensional coordinate system.

Physics
1 answer:
NISA [10]3 years ago
5 0
A. 1 dimensional coordinate system
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A Carnot engine whose high-temperature reservoir is at 620 k takes in 550 J of heat at this temperature in each cycle and gives
yarga [219]

Answer:

(a) W=217 J

(b) Tc=378K

(c) e=0.39=39%

Explanation:

For part (a)

We to calculate the mechanical work W the engine  does. By knowing QC and QH can obtain the work using equation  

W = IQHI — IQcl  .....................eq(1)

Put given values for QH and QC into equation (1) to get  

the mechanical work of the engine  

W = 550 - 335  

W=217 J

For part (b)

We want to determine the temperature of low temperature  reservoir which means Tc  

IQc|/|Qh| =TC/TH  

for Tc  

Tc=(IQc|/|Qh|)*TH

Now we can put values

Tc= 620K  (335/ 550.1)  

Tc=378K  

For part (c)

Here we want to find the thermal efficiency (e) of the cycle

e=1-TC/TH

e=1-(378/620)

e=0.39=39%

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3 years ago
How does a black hole form
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A black hole forms when the center of a very massive star collapses in upon itself.
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Vaselesa [24]

Answer:

hi there!!

Explanation:

Nickel  149 pm

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So Potassium is the correct answer

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How long will it take a person walking at 3.2 m/s to travel 16 m? *
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Answer:

speed=distance/time

time=distance/speed

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Frank and Lisa are analyzing the chart, which shows the speed at which light travels through different media. Frank says that li
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The correct answer is
c) Neither person is correct because light does not change frequency when it travels through different media

In fact, light changes both wavelength and speed when it travels through different media, but the frequency remains the same.
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3 years ago
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