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GarryVolchara [31]

3 years ago

7

• Describe the importance of a commonly used measuring system. Be prepared to give two examples of why having a common system of

measurement is important.
1.
2.

1 answer:

IrinaVladis [17]3 years ago

3 0

Metric system. important because it saves us time due to the fact that we do not have to convert our units every time.

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in a 4 kilometer race, a runner completes the first kilometer in 5.9 minutes, the second kilometer in 6.2 minutes, the third kil

ohaa [14]

To find the average of data collected, add all of the measurements: 5.9+6.2+6.3+6= 12.2

Then, divide the total amount by the number of data collected which is 4: 12.2/4= 3.05

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3 years ago

Read 2 more answers

1. What are the things needed by plants to make their own food?

iren2701 [21]

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2-D(parasitism)

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3 years ago

What minimum heat is needed to bring 250 g of water at 20 ∘C to the boiling point and completely boil it away? The specific heat

Amiraneli [1.4K]

Answer:633.8 KJ

Explanation:

Given

mass of water $\left ( m\right )=250gm$

Initial temperature $\left ( T_i\right )=20^{\circ}C$

Final temperature $\left ( T_f\right )=100^{\circ}C$

Specific heat of water $\left ( c \right )$ =4190 J/kg-k

heat of vaporization $\left ( L\right )=22.6\times 10^5 J/kg$

Heat required for process $\left ( Q\right )$ =heat to raise water temperature from 20 to 100 +Heat to vapourize water completely

Q=mc $\left ( T_f-T_i\right )+mL$

Q= $0.25\times 4190\times \left ( 100-20\right )+0.25\times 22\times 10^5$

Q= $\left ( 0.838+5.5\right )\times 10^5$

Q= $6.338\times 10^5J=633.8 KJ$

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Which chemical equation represents a decomposition reaction? HELP ASAP!!!!

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