The dam wall is (thinner, thicker) at the bottom compared to the above part because the water pressure effect on the base of the dam is (lower, higher). 水坝的水压
thicker, higher
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25
What is the type of force when an object is in contact with a surface?当一个物体碰触在一个表面上时,产生了什么力?
Normal force
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banana
Go to last place!
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fairy
Take points!
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fairy
Take points!
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lifesaver
Give 10 points!
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25
Name the CLASS OF LEVER for Stapler and Hole Puncher. 订书机和打洞机属于哪种杠杆类?
Second Class Lever
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25
How to clean the fish pond by removing the dirty water from the pond? 如何清除池里的脏水?By using......
siphon
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thief
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rocket
Go to first place!
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gift
Win 20 points!
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baam
Lose 20 points!
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25
The S.I unit of force.力的国际标准单位是......
Newton (N)
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25
State a type of force acting on a duck. 鸭子施加的一种力是........
Buoyant force
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25
What are the factors affecting pressure? 什么因素会影响压力
Surface area and force
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monster
Reset all scores!
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seesaw
Swap points!
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fairy
Take points!
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thief
Give points!
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heart
Other team wins 10 points!
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rocket
Go to first place!
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gift
Win 20 points!
Okay!
banana
Go to last place!
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25
Show the arrow of the Weight and Buoyant force on the object. 画出箭头显示物体的重力和浮力位置。
Weight: Arrow DOWN; Buoyant force: Arrow UP
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25
The S.I unit to measure the PRESSURE is ( ) 测量压力的国际标准单位是........
Pascal (Pa)
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25
State THREE daily activities which involved PUSH and PULL force 列举出三个在日常生活中有涉及推和拉力的动作
Opening a door, Pressing a switch, Opening a can food, Opening a car door, Opening a drawer
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25
Why is the duck is able to walk smoothly instead of the chicken? 为什么鸭子比鸡步行快步?
The size of the duck's legs is larger than the chicken. The pressure produced lower than the chicken.