The temperature of the physical problem, the change of the physical temperature

1. B, B; (Because the inner diameter of B's glass tube is small, when the volume of liquid A and B changes the same, the length of B's liquid column changes more; Within the same length, B represents a small quantity, so it is more accurate).

2. D algorithm: The indicator of 90---6 represents 100 degrees, so the indicator of each degree is (90-6) 100, so the indicator at 25 is: (90-6) 100 * 25 = 21

1.B, B.

This thermometer 90-6 = 84 degrees Celsius represents the standard temperature 100-0 = 100 degrees Celsius, then the standard 1 degree Celsius represents 84 100 = 21 25 degrees of this thermometer, so the standard 25 degrees Celsius is equivalent to 21 25 * 25 = 21 degrees Celsius of this thermometer, and because 6 degrees Celsius represents 0 degrees Celsius, the number is 21 + 6 = 27 degrees Celsius.

1.Fill in B.

Algorithm: The indication of 90---6 represents 100 degrees, so the indication of each degree is (90-6) 100, so the indication at 25 is: (90-6) 100 * 25 = 21

It is assumed that the relationship between the reading and the actual temperature is.

t＝at+b

Yes. 4＝0+b

96＝100a+b

Get b 4a 1

So now 30 degrees actual temperature.

30＝at+4=1*t+4

T = 26 is obtained

1.A, B.

2.Let the true temperature be x and the indicator is y

Set to y=kx+b

90=100k+b

6=b is solved as a function of y=

Substituting x=25, we get 27

Warming from 1 degree to 2 degrees is replaced by 274k to 275k, which is an increase of 1k"So far, that's all right. In the Celsius and Kelvin temperature scales, the same temperature difference represents the same change in the degree of cold and heat. Such as:

Raise 1k from 1 k, and the temperature becomes k. (expressed in degrees Celsius: from degrees Celsius to temperatures); Or by raising k from k, the temperature becomes k.

In terms of Celsius, it means that from Celsius to Celsius, the temperature becomes Celsius. And the same temperature can also be expressed by two temperature scales.

For example, if the temperature of the ice-water mixture is 0 degrees Celsius, it can also be expressed as 273 degrees Kelvin. However, "a 1k increase is -272 degrees." This statement is wrong.

No matter what kind of temperature scale is used, the increase is only a temperature change, not a temperature. If it is an increase in degrees, if it is expressed in Kelvin temperature, an increase of 1k in temperature is also in degrees Celsius. Hope it helps.

The difference between Celsius and Fahrenheit is actually calculated in the same way, one degree Celsius increase is equivalent to an increase of 1k, but they start measuring from different starting points, Celsius starts at what I usually call 0 degrees, and Fahrenheit starts at -274°C. It's like two people running, A starts at 0 meters, and B starts running 274 meters behind him, but they have the same speed, so A runs 1 meter and B also runs 1 meter.

There are even more dizzy ones! Heating from 1 degree to 2 degrees, that is, from 274k to 275k, an increase of 1k, and the original increase of 1 degree, that is, 1 degree is equal to 1k, which is obviously not true. AhhI'm done stunted by you.

Two different units of temperature measurement: 1°C = 274K 2°C = 275K 1°C to 2°C is also a 1K rise.

1 to 2 degrees has dropped by 272 degrees.

Kelvin temperature and Celsius temperature can not be mixed, because one degree of two temperatures represents the same temperature difference, we can use two parallel units of the same number axis x( )y (Kelvin temperature) to dedicate, where x+273=y, then you can see for yourself the problem of 1 degree to 2 degrees, the mobile phone specifically proves the pressure.

Grade 8 Physics: Change of State of Matter**Characteristics of temperature changes when water boils.

94-4=90 So 90 degrees of this thermometer is 100 degrees of ordinary thermometers.

So each degree scale is a degree, and 0 degrees is 4 degrees.

So the first empty temperature is 22-4=18

So it's 20 degrees.

The second empty temperature is 40

So it's 40 degrees.

4 represents 0 of the true temperature (because the temperature of the ice-water mixture is 0), 94 represents the true temperature of 100 (because the boiling point of water at 1 standard atmosphere is 100), and since the scale of the thermometer is uniform, 90 cells between 4 and 94 on the thermometer represent 100, so each cell of this thermometer represents the true temperature of (100 90).

So the first void should be: (22-4) (100 90) =20

The second void should be: 40 (100 90)+4=40

The first empty second empty space! It's as simple as that.

Before using a thermometer, observe its range, i.e. the maximum and minimum values it can measure; If the temperature to be measured is higher than the maximum temperature of the thermometer or lower than the minimum temperature it can measure, the thermometer may be damaged by the liquid inside it or sensitive enough to detect the temperature of the liquid to be measured. Therefore, before measuring the temperature of a liquid, it is important to estimate the temperature to be measured, and then select a thermometer with the appropriate range.

Dry ice is a solid state, i.e., carbon dioxide in a solid state.

Before using a thermometer, observe its range, that is, the range of temperatures it can measure; If the temperature to be measured is higher than the maximum temperature of the thermometer or lower than the minimum temperature it can measure, the thermometer may be damaged by the liquid in it or not sensitive enough to be detected, so before measuring the temperature of the liquid, be sure to estimate the temperature to be measured, and then choose a suitable thermometer.

Dry ice is solid,

Temperature range.

.Curing or gasification.

The temperature is estimated to be suitable for solid.

High 2 Inference: If the temperature is increased by 10 degrees and the measured temperature is from -1 degree + degree, it means that the 10 degrees of the actual temperature are measured as degrees, that is, every 10 degrees of height, so an increase of 10 degrees will be higher on the basis of the second time, that is, 2 degrees higher. The reason why it was low (due to the uniform scale) was because the starting scale was too high.

The latter problem conditions are not clear, generally speaking, even if the thermometer is not accurate, but the zero degree scale is accurate, but according to the above, the position of the 0 scale should be high, and the amount of ice and water mixture cannot be measured. But if you don't consider the scale problem, it is 115 degrees worse, a simple 100*1015

1. 2 degrees Celsius higher;

Celsius.

You made the wrong turn when you converted.

I replaced 48c with f, this is wrong, because this is the difference, so when you convert, the result is also the difference, the conversion standard between Celsius and Fahrenheit is: Fahrenheit = 32 + Celsius But when you convert the difference, you should pay attention to 32 is a constant, and this value must be added when converting at both ends of the interval, so the result of the difference conversion is to be eliminated, that is to say, the difference between 48 degrees Celsius and Fahrenheit is 48 =, so that the final Fahrenheit temperature is 69+.

If you convert the initial value to degrees Celsius, replace 69f with c yes, add 48c, which is 48+, to Fahrenheit, which translates to Fahrenheit, Fahrenheit = 32 + Celsius i.e. = 32+ =.

Both results are the same.

Also, think about it, if it's Celsius and thermodynamic temperature conversion, the difference between them by one degree is the same; And the difference between Celsius and Fahrenheit is a relationship.

48c to f, plus 69f, the reason for the error: (32 + 48 =.)

This method is good, but you can't use a dead formula for temperature conversion, you must really understand the meaning of the conversion formula!

This conversion formula is: Fahrenheit = 32 + Celsius

The constant 32 is because 0° Celsius is equal to 32 F. Fahrenheit. Below 0C° is below zero, which is negative!

The most important thing to understand about Celsius and Fahrenheit is that 0C°--100C° is equal to 32F---212F!That is, if we divide the temperature into cells, 100 cells of Celsius is equal to 180 cells of Fahrenheit (212-32 = 180), that is, 1c°=

Specific to this question, the correct calculation is:

This is the same as your second method, which is to convert 69f to c, add 48c, and convert it to f, and the answer is the same.

Landlord, you should understand that Celsius and Fahrenheit are two sets of temperature scales. There is a one-to-one correspondence between them. It's like the relationship between feet and centimeters.

The amount of change in one degree Celsius is the same as the amount of change in one degree Fahrenheit. The 48 degrees you heat is just a variable quantity, and you can not pursue the unit. Celsius and Fahrenheit are fine.

So when you calculate, it's Fahrenheit at first, so just add 48. The end result is the unit of Fahrenheit. If it is Celsius initially, you can also add 48 directly, and what you get is the Celsius temperature.

You should pay attention to understand these two points:

1. The meaning of the title should be to increase 48, not to heat to;

2. Increasing 1f is the same as 1, both represent a change amplitude; Therefore, an increase of 48 is the same as an increase of 48f;

You misunderstood, this question is to test the volume change caused by the change in temperature, the temperature from 0-100 degrees mercury volume change is cubic centimeter = cubic millimeter.

The liquid level is different because of the different surface tension and wettability of the liquid. Hole in the hole.

The difference in the reading method is mainly to consider the accuracy of the reading, mercury, should be read at the top of the liquid level, the surrounding liquid level is a little lower, so the volume of the reading is a little less than the real value.

Kerosene or alcohol, should be read at the bottom of the concave liquid level, around the vertical side of the liquid level is a little higher, so the volume read is a little more than the true value.