![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Which mercury barometer or mercury thermometer can not be used in space
Barometers, of course, are based on gravity, while thermometers are hot and cold, and have little to do with pressure
One end of the 100CM long fine glass tube with uniform inner diameter shall be closed and the other end shall be opened. When the opening is placed upward in the next day, the 44CM long air column shall be closed with 25CM long mercury column. At that time, the atmospheric pressure is 75CMHG. If the opening of the glass tube is placed vertically downward, what is the length of the closed air column in the tube?
80Cm
If the glass tube is long enough, it is 88. However, the glass tube is only 1m long. When adding 25cm of mercury, it is not enough, so the mercury will flow out a part. Set the air column length x so that the mercury left in the glass tube is (100-x).
Column equation 100*44=(75-(100-x))*x
Solution x=80cm
80Cm
If the glass tube is long enough, it is 88. However, the glass tube is only 1m long. When adding 25cm of mercury, it is not enough, so mercury will flow out a part. Set the air column length x so that the mercury left in the glass tube is (100-x).
Column equation 100*44=(75-(100-x))*x
Solution x=80cm
80Cm
If the glass tube is long enough, it is 88. However, the glass tube is only 1m long. When adding 25cm of mercury, it is not enough, so the mercury will flow out. Set the air column length x so that the mercury left in the glass tube is (100-x).
Column equation 100*44=(75-(100-x))*x
Solution x=80cm
RELATED INFORMATIONS
- 1. Insert the 1m long glass tube with one end closed and uniform opening into the mercury groove 25cm deep downward. When the atmospheric pressure is equal to the pressure generated by 75cm high mercury column, the height of mercury column entering the tube is () A.11.6 cm B.13.4 cm C.25 cm D.38.4 cm
- 2. A fine glass tube of 100 cm in length, with one end closed and one end open. When the opening is vertically upward, seal the 49 cm long air column with 20 cm mercury column, as shown in the figure. When the opening is vertically downward, what is the length of the air column closed in the tube? Let the atmospheric pressure be 76 cmHg. A 100 cm long glass tube with a uniform inner diameter. One end was sealed and the other end was opened. When the opening was vertically upward, the 49 cm long air column was sealed with 20 cm mercury. As shown in the figure, when the opening was vertically downward, how long was the sealed air column in the tube? At that time, the atmospheric pressure was 76 cmHg. A fine glass tube of 100 cm in length, with one end closed and one end open. When the opening is vertically upward, seal the 49 cm long air column with 20 cm mercury column, as shown in the figure. When the opening is vertically downward, what is the length of the closed air column in the tube? Let the atmospheric pressure be 76 cmHg.
- 3. Chemical equation for potassium permanganate to oxygen, chemical equation for potassium chlorate to oxygen
- 4. What is the difference between deoxyribonucleic acid and deoxyribonucleic acid
- 5. The catalyst for the reaction of bromine with benzene is FeBr3. Why is only Fe added in the experiment? In addition, the reaction exotherm, benzene, liquid bromine are volatile, in order to reduce the effect of exotherm on benzene and liquid bromine volatile, the device should have a unique design? The produced HBr gas is easily soluble in water, how should it be absorbed and tested? The catalyst for the reaction of bromine and benzene is FeBr3. Why is only Fe added in the experiment? In addition, the reaction exotherm, benzene, liquid bromine are volatile, in order to reduce the effect of exotherm on benzene and liquid bromine volatile, the device should have a unique design? The produced HBr gas is easily soluble in water, how should it be absorbed and tested?
- 6. Fill the 10ml test tube with mixed gas of NO2 and O2, invert it in the water tank with sufficient water,1, if the water is completely filled in the test tube, The volume of the original gas mixture is? The volume of O2 is? 2. If the last remaining gas is 1ml, the volume of NO2 in the original mixed gas may be? Fill the 10ml test tube with mixed gas of NO2 and O2, invert it in the water tank with sufficient water,1, if the water is completely filled in the test tube, The volume of the original mixture is? The volume of O2 is? 2. If the last remaining gas is 1ml, the volume of NO2 in the original gas mixture may be?
- 7. Two identical thin-walled glass tubes are suspended from the spring scale, and the opening is inserted downward into the mercury tank (the nozzle is not in contact with the bottom of the mercury tank). The tube has a length of h1, h2 mercury column (h1F2 B.F1
- 8. Flask of the same volume is filled with ammonia gas and hydrogen chloride gas respectively under the same temperature and pressure. After the fountain experiment, the water is filled with the flasks. What is the ratio of the concentration of the substance in the flask Flask of the same volume is filled with ammonia gas and hydrogen chloride gas respectively under the same temperature and pressure. After the fountain experiment, water is filled with the flasks. What is the ratio of the concentration of the substance in the flask Flasks of the same volume under the same temperature and pressure were filled with ammonia gas and hydrogen chloride gas respectively. After the fountain experiment, the water was filled with the flasks. What is the ratio of the concentration of the substance in the flask
- 9. Do a fountain experiment with a flask filled with ammonia. When water fills the flask, what is the concentration of ammonia in the flask? A flask filled with ammonia gas is used for fountain test. When water fills the entire flask, what is the concentration of ammonia gas in the flask?
- 10. THERMOCHEMICAL EQU Combustion in Oxygen to Produce Gaseous Water and Nitrogen Dioxide ThermochemicalOCHEMICAL EQU Combustion in Oxygen to Produce Gaseous Water and Nitrogen Dioxide
- 11. How much Pa is a standard atmospheric pressure, how much centimeter of mercury, how much water? How much is a barometric pressure, how much centimeter of mercury, how much water? How much is a standard barometric pressure, how much centimeter of mercury, how much water?
- 12. If the mercury barometer contains water instead of mercury, what is the height of the water column in the pipe when the external atmospheric pressure is 101,000 Pa If the mercury barometer is filled with water instead of mercury, what is the height of the water column in the pipe when the external atmospheric pressure is 101,000 Pa
- 13. A certain quality of air is enclosed in a U-shaped glass tube which is still placed in a vertical plane by mercury. The upper end of the right tube is open and long enough. The silver surface in the right tube is higher than that in the left tube by h. The reason why h becomes larger is () A. The ambient temperature rises B. The atmospheric pressure rises strongly by C. Mercury is added to the right tube along the tube wall. A certain mass of air is enclosed in a glass tube which is still placed in a vertical plane by mercury. The mercury surface in the tube is higher than that outside the tube by h. Which of the following measures can make h larger () A. Press the glass tube upward slightly b. Reduce the external atmospheric pressure c. Take the nozzle as the center, and rotate it slightly in the vertical plane by a small angle D. The whole device falls freely. .U-shaped glass tube free fall The U-shaped glass tube falls freely. This is option D of the first question.
- 14. One end of a glass tube with uniform thickness is opened. When placed horizontally, there is a 25cm long mercury column enclosing a 40cm long air column. If the glass tube is opened upward,
- 15. Measure the atmospheric pressure value with Torrecholi test (vacuum is placed on the silver surface inside the glass tube). The following process will cause the measurement value to change: A. Move the test from the foot of the mountain to the top of the mountain. B. Lower the glass tube slightly. C. Tilt the glass tube slightly. D. Use a slightly thicker glass tube The atmospheric pressure is measured by the Torricelli test (vacuum is placed on the silver surface inside the glass tube). The following process will cause changes in the measured value: A. Move the test from the foot of the mountain to the top of the mountain. B. Lower the glass tube slightly. C. Tilt the glass tube slightly. D. Use a slightly thicker glass tube
- 16. When using mercury for Torricelli experiments, the atmospheric pressure outside supports a column of mercury 0.76 m high. What is the minimum length of a glass tube for water? Please use the formula, I know the answer is 10.3m When using mercury for Torricelli experiments, the outside atmospheric pressure supports a column of mercury 0.76 m high. How long would it take to replace the glass tube with water? Please use the formula, I know the answer is 10.3m
- 17. When the atmospheric pressure is low in summer, the professional fish farmers need to add oxygen to the fish pond to prevent the death of fish from hypoxia. Xiao Ming designed an automatic oxygenation system. He modified the mercury barometer in the laboratory. A copper wire is sealed at the left top of the barometer, and a copper wire is fixed at the right opening, as shown in the figure. The mercury surface on the left of the barometer is above the vacuum. When the left mercury surface drops, the right mercury surface will rise. If the external atmospheric pressure is lower than the pressure generated by the 74cm high mercury column, the mercury column will connect the copper wires on both sides, so that the control circuit of the electromagnetic relay will form a path, and the electromagnet will absorb the armature. When the working circuit is connected, the oxygenation pump (AC motor) works automatically. (1) The copper conductor on the right side of the barometer shall be extended vertically downward to the right center of ______cm. Please draw it in the figure at the same time. (2) Please connect the circuit directly in the drawing according to the requirements.
- 18. 2. Place the mercury tank on the left plate of the balance, fix the glass tube with the support, and put an appropriate amount of weights into the left plate to balance the balance. If the atmospheric pressure increases, the correct value is A. The balance is unbalanced. If the balance is restored, add weights on the right plate. B. The balance is unbalanced. If the balance is restored, the weight shall be subtracted from the right plate. C. Balance still balanced D. Inability to determine Why doesn't the mercury column in the glass tube put pressure on the balance plate 2. Place the mercury tank on the left side of the balance, fix the glass tube with the support, and put an appropriate amount of weights in the left side to balance the balance. If the atmospheric pressure increases, the correct value is A. The balance is unbalanced. If the balance is restored, add a weight on the right plate. B. The balance is unbalanced. If the balance is restored, the weight shall be subtracted from the right plate. C. Balance still balanced D. Inability to judge Why doesn't the mercury column in the glass tube put pressure on the balance plate
- 19. The glass tube in the mercury barometer contains not mercury but water. When the atmospheric pressure is 760g, how high is the water The glass tube in the mercury barometer contains not mercury but water. When the barometric pressure is 760g, how high is the water
- 20. A rectangular glass body 30 cm x 30 cm bottom filled with water is now poured into a square bottom A rectangular glass body with a bottom surface of 30cm x 30cm is filled with water. Now pour a part into an iron bucket with a square bottom surface and a height of 10cm. When the iron bucket is filled with water, the water surface in the container drops by 20cm. What is the side length of the bottom surface of the iron bucket? A 30 cm x 30 cm rectangular glass body filled with water of 30 cm x 30 cm, a portion is now poured into a square bottom surface A rectangular glass body with a bottom surface of 30cm x 30cm is filled with water. Now pour a part into an iron bucket with a square bottom surface and a height of 10cm. When the iron bucket is filled with water, the water surface in the container drops by 20cm. What is the side length of the bottom surface of the iron bucket?