question - answer physics class 7
"Temperature"
1. Who designed the termoskop / thermometer first?
Answer: Galileo Galilei in the year (1564 - 1642)
2. Usually the alcohol and mercury thermometers used to fill the jar,because it has advantages.
What are the advantages to use of alcohol and mercury ...?
Answer:
a. Excess alcohol:
* Can measure low temperatures, due to low melting points
(negative 105 degrees Celsius)
* Can measure temperature accurately, because it has a largeexpansion coefficient.
* pemuaiannya regularly.
b. Excess mercury
* Easy to see, because the color is shiny like silver.
* pemuaiannya regularly.
* No wet the wall place.
* Can measure high temperature, because of the high boiling point (356.9 ⁰ C)
* Can measure the temperature quickly and accurately.
"Temperature"
1. Who designed the termoskop / thermometer first?
Answer: Galileo Galilei in the year (1564 - 1642)
2. Usually the alcohol and mercury thermometers used to fill the jar,because it has advantages.
What are the advantages to use of alcohol and mercury ...?
Answer:
a. Excess alcohol:
* Can measure low temperatures, due to low melting points
(negative 105 degrees Celsius)
* Can measure temperature accurately, because it has a largeexpansion coefficient.
* pemuaiannya regularly.
b. Excess mercury
* Easy to see, because the color is shiny like silver.
* pemuaiannya regularly.
* No wet the wall place.
* Can measure high temperature, because of the high boiling point (356.9 ⁰ C)
* Can measure the temperature quickly and accurately.
3.Suatu objects measured with a thermometer centigrade scaleshowed 127 ⁰ C. What is the
temperature it was when measuredwith a thermometer Kelvin?
Answer :
t ⁰C = ( t + 273 ) ⁰K
127⁰C = ( 127 + 273 ) ⁰K
127⁰C = 400⁰K
So , 127⁰C = 400⁰K.
4. State the kinds of thermometer
Answer:
a. Clinical thermometer
b. Thermometer wall
c. maximum and minimum thermometer of Six-Bellani.
5. Where is Anders Celsius was a scientist who is famous for the measurement of "degree
centigrade" was born?
Answer: Anders Celsius was born in Uppsala in 1701.
6. What is the long expansion coefficient substance?
Answer: The number of states added length per unit length of that material temperature rises 1
degree Celsius.
7. Iron grew 150 cm in length 0.2 cm long. If the temperatureincreases 75 ⁰ C. Calculate the
length expansion coefficient of iron?
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