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3 years ago

Which of the following is a synthesis reaction? (choose one answer)

Physics

1 answer:

mamaluj [8]3 years ago

7 0

Answer:

Option A. 2NO + O₂ —> 2NO₂

Explanation:

To know which option is correct, it is important that we know what is synthesis reaction.

Synthesis reaction is a reaction in which two different elements or compound combine together to produce a new compound different from the two starting elements or compound. Example of such reaction is given below:

X + Y —> Z

Considering the options given in the question above, only option A comform to the definition of synthesis reaction. Thus, option A gives the correct answer to the question.

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A package of chips weighs 45 grams. How much is that in kilograms?

umka21 [38]

There is 1000 grams in 1 kilogram, and so:

Your answer to this question is 0.045 kilograms

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4 years ago

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72 km/h is equal to-------------------------------------------------------------------------------

tatuchka [14]

Answer:

20 m/s

Explanation:

First, you have to convert kilometers (72) to meters (72.000) then do the same with hours (1 hour) and seconds (3.600) Divide this numbers and you will get a result.

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3 years ago

If the Andromeda galaxy is blue shifted what would the effect be called?

AlladinOne [14]

Answer:

Doppler blueshift

Explanation:

is used in astronomy to determine relative motion: The Andromeda Galaxy is moving toward our own Milky Way galaxy within the Local Group; thus, when observed from Earth, its light is undergoing a blueshift.

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3 years ago

Which of the folltrue or false: the ratio of heat exchange in conduction is independent of exposure time.owing techniques uses e

Sliva [168]

True conditions

Efficiency of Heat Exchanger are as below:

the heat exchange process between two fluids with different temperatures using solid walls occurs in various engineering applications. The tool to achieve this exchange is a heat exchanger. Some applications like air conditioning, power generation, waste heat recovery, and chemical processing use this device.

The basis of the work of a heat exchanger is that the hot fluid enters the heat exchanger at temperature T1 and its heat capacity is Chot. Also, the cold fluid with the heat capacity of Ccold enters temperature t1; in the meantime, the hot fluid loses its heat, and its temperature drops to T2. It delivers heat to the cold fluid to increase its temperature to t2 and leave the heat exchanger at this temperature.

To learn more about Heat Exchanger

brainly.com/question/22595817

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2 years ago

When two resistors are connected in parallel across a battery of unknown voltage, one resistor carries a current of 3.3 a while

stellarik [79]

Correct question: When two resistors are connected in parallel across a battery of unknown voltage, one resistor carries a current of 3.3 A while the second carries a current of 1.8 A .

What current will be supplied by the same battery if these two resistors are connected to it in series?

Answer:

1.164 A

Explanation:

From the question,

Let the unknown voltage of the batter = V.

Since the two resistors are connected in parallel,

The voltage across each of the resistor is the same = V,

Then,

From ohm's law,

V = IR................... Equation 1

Where V = Voltage, I = Current, R = Resistance.

make R the subject of the equation

R = V/I................ Equation 2

For the first resistor,

Given: I₁ = 3.3 A, V = V.

Substitute into equation 2

R₁ = V/3.3 Ω

For the second resistor,

Given: I₂ = 1.8 A

Substitute into equation 2

R₂ = V/1.8 Ω.

When the Resistors are connected in series,

Rt = R₁+R₂

Where Rt = Total resistance.

Rt = V/3.3+V/1.8

Rt = (1.8V+3.3V)/(3.3×1.8)

Rt = 5.1V/5.94

Rt = 0.859V.

Applying,

I' = V/Rt

where I' = current supplied by the battery, If the two resistors are connected in series

I' = V/0.859V

I' = 1.164 A

7 0

3 years ago