The reason g is smaller at high altitudes(高度) than at low is because a body weighs less at high altitudes and therefore accelerates(加速) more slowly in free fall.
高空的g比低空的小的原因在于,物体在高空时的重量比较轻,所以在自由下落时加速度比较慢。
举一反三
- Which of the following management methods cares more about people, yet less about the production (task)? A: High relationship, low task. B: High relationship, high task. C: Low relationship, low task. D: Low relationship, high task.
- Pressurization problems are so hazardous that pilots should make an immediate descent to altitudes less than 1400 meters.
- I have........(less free time now than, so less free time now as) I had when I was in high school.
- Water attains the boiling temperature quicker in the high elevations than at the low level. Because: A: . the air pressure is lower at high elevations B: . the gravitational force is low in the mountains C: . the sunlight is high in the higher elevations D: . All of them
- When prices are low people will buy more, and when prices are high they will buy ________. A: more B: higher C: less D: lower
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each parcel weighs less than 1kg, to take advantage of free shipping.
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选择正确的答案。I have ____ I had when I was in high school. A: less free time now than B: so less free time now as
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2.What is the main reason for the problem? A: Competition. B: High price. C: Low motivation. D: High motivation
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(1 )College is more expensive than high school because of tuition, living expenses, and books.
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No organ of the body is less appreciated than the skin.（） A: understand with sympathy B: enjoyed C: acknowledged D: set high value on