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Lorico [155]
3 years ago
12

Which best describes the current atomic theory? (1 point) a Since it is only a theory it should not be used in practice. b It ha

s not been tested enough to be useful for developing technology. c It is the most powerful explanation scientists have to offer at this time. d There is very little chance it will be changed in the future.
Physics
2 answers:
Ahat [919]3 years ago
8 0

Answer:scientist try to fix it

Explanation:

gayaneshka [121]3 years ago
6 0

Answer:

Hello there buddy

Your answer is

d There is very little chance it will be changed in the future.

Hope it’s helps you buddy

I’m really sorry if my answer is wrong

Explanation:

~ZaynTheEpicFoxy

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What type of data allows geologists to know what rock layers lie underneath Minnesota?
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Is this statement true or false?
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The statement is true! 
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 A student needs help completing an energy transfer diagram for a ceiling fan. Which BEST fills in the blanks labeled M and N to
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Answer: C) N: Electrical energy and M: Kinetic energy

Explanation:

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An inventor claims to have developed a food freezer that, in steady-state conditions, requires a power input of 0.25 kW to extra
WARRIOR [948]

Answer:

The inventors  claim is not real

a)  No the the freezer cannot operate in such conditions

Explanation:

From the question we are told that

     The  power input is  P_i  = 0.25 kW  =  0.25 *10^{3} \ W

      The  rate of heat transfer J  =  3050 J/s

       The temperature of the freezer content is T = 270 \ K

       The  ambient temperature is  T_a  =  293 \ K

Generally the coefficient of performance of a refrigerator at idea conditions is mathematically represented as

      COP  =  \frac{T }{Ta - T}

substituting values

     COP  =  \frac{270 }{293 - 270}

     COP  =11.7

Generally the coefficient of performance of a refrigerator at real conditions is mathematically represented as

       COP  =  \frac{J}{P_i}

substituting values

       COP  =  \frac{3050}{0.25 *10^{3}}

       COP  = 12.2

Now given that the COP  of an ideal refrigerator is  less that that of a real refrigerator then the claims of the inventor is rejected

This is because the there are loss in the real refrigerator cycle that are suppose to reduce the COP compared to an ideal refrigerator cycle where there no loss that will reduce the COP

4 0
3 years ago
Where are the most reactive nonmetal elements found on the periodic table?
Sindrei [870]

Answer;

At the top of group 17

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Reactivity in chemistry deals with whether something will react with another substance. The reactivity of an element can be predicted based on its location on the periodic table.

The most reactive nonmetal is fluorine. Fluorine is a halogen, which is Group 17 on the periodic table, and the halogens are the most reactive nonmetals. This is because they all have one empty space in their valence electron shells. Of the halogens, fluorine's empty space is closest to the positively charged nucleus. This means it pulls harder on another atom's electrons to fill that empty space.

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