![](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>)
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
The density of water is 1 and the density of mercury is 13.6, which is equivalent to the standard atmospheric pressure of 760 mm of mercury, which is 10336 mm of water.
Why can mercury thermometers, silver barometers and scales be used in man-made Earth satellites? Why could they use mercury thermometers, silver barometers, and scales in artificial earth satellites?
Because mercury thermometers use the principle of heat expansion and cold contraction to keep space unaffected
The mercury barometer uses the pressure in space as the vacuum pressure is 0
The balance uses gravity. It's very weak in space.
Because mercury thermometers use the principle of thermal expansion and contraction in space
The mercury barometer uses pressure in space as the vacuum pressure is 0
The balance uses gravity. It's weak in space.
RELATED INFORMATIONS
- 1. 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
- 2. 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.
- 3. 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
- 4. 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
- 5. 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,
- 6. 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.
- 7. 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
- 8. 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?
- 9. Which mercury barometer or mercury thermometer can not be used in space
- 10. 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
- 11. 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?
- 12. A 30 cm×30 cm rectangular glass container was filled with water. Now, a portion of the water was poured into an iron bucket with a square bottom and a height of 10 cm. When the iron bucket was filled with water, the water in the container dropped by 20 cm. How long was the bottom of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron bucket with a square bottom 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 of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron drum with a square bottom and a height of 10cm. When the iron drum is filled with water, the water surface in the container drops by 20cm. What is the length of the bottom side of the iron drum?
- 13. A 30 cm×30 cm rectangular glass container was filled with water. Now, a portion of the water was poured into an iron bucket with a square bottom and a height of 10 cm. When the iron bucket was filled with water, the water in the container dropped by 20 cm. How long was the bottom of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron bucket with a square bottom 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 of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron drum with a square bottom and a height of 10cm. When the iron drum is filled with water, the water surface in the container drops by 20cm. What is the length of the bottom side of the iron drum?
- 14. A 30 cm×30 cm rectangular glass container was filled with water. Now, a portion of the water was poured into an iron bucket with a square bottom and a height of 10 cm. When the iron bucket was filled with water, the water in the container dropped by 20 cm. How long was the bottom of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron bucket with a square bottom 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 of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron drum with a square bottom and a height of 10cm. When the iron drum is filled with water, the water surface in the container drops by 20cm. What is the length of the bottom side of the iron drum?
- 15. A 30 cm×30 cm rectangular glass container was filled with water. Now, a portion of the water was poured into an iron bucket with a square bottom and a height of 10 cm. When the iron bucket was filled with water, the water in the container dropped by 20 cm. How long was the bottom of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron bucket with a square bottom 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 of the iron bucket? A 30cm×30cm rectangular glass container is filled with water. Now, pour some water into an iron drum with a square bottom and a height of 10cm. When the iron drum is filled with water, the water surface in the container drops by 20cm. What is the length of the bottom side of the iron drum?
- 16. A rectangular glass container with a bottom surface of 30 cm by 30 cm is filled with water, and a portion of the water is poured into an iron drum with a bottom surface of 10 cm high When the iron drum is filled with water, the water level in the container drops by 20cm. What is the side length of the bottom surface of the iron drum? Write wrong, is to pour part of the water into a square bottom, after the same A rectangular glass container with a bottom surface of 30 cm by 30 cm is filled with water, and a portion of the water is poured into an iron drum with a bottom surface of 10 cm high When the drum is filled with water, the water level in the container drops by 20cm. What is the side length of the bottom of the drum? Write wrong, is to pour part of the water into a square bottom, after the same
- 17. Mr. li was doing a torrecelli experiment to study atmospheric pressure when the glass tube was so thin that it closed off a portion of the air when the mercury was poured. If the mercury column is only 20 cm high, the following statement is true: A. When the glass tube is placed vertically upward, the air pressure enclosed in the tube is equal to the pressure outside B. When the glass tube is placed horizontally, the air pressure enclosed in the tube is equal to the pressure outside C. When the glass nozzle is placed vertically downward (the watermark is not poured out), the air pressure enclosed in the pipe is equal to the atmospheric pressure outside D. Regardless of placement, the closed air pressure inside the tube is equal to the atmospheric pressure outside Please elaborate on why, which is right and why others are wrong Be sure to analyze them one by one
- 18. The vertical height difference between the inner and outer mercury surfaces of the glass tube is 700mm, and the local atmospheric pressure is () mm mercury column
- 19. The sum of the edges of a cuboid is equal to that of a cube. The cuboid is known to be 8 cm long and 5 cm wide, and its volume is cubic
- 20. When a cuboid of 100 decimetres is cut off from a cuboid, the remaining part is exactly a 5 minute square with the original cuboid What is the square decimeter of the surface area of (continued ↑)