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Anonymous users2024-02-09True love is not necessarily a perfect match in the eyes of others But the mutual fit of the hearts of people who love each other is to make each other's lives better and silently dedicate This love not only warms themselves, but also warms those worldly hearts True love is when you can love, know how to cherish True love is when you can't love, know how to let go Because, letting go is the ...... to have everythingPlease cherish the time, love well True love is a kind of care and care from the heart, there are no flowery words, no grandiose actions, only in every word and deed you can feel it. So plain and so firm. On the contrary, swearing, promising shows its uncertainty, never believe sweet words.
Feel it with your heart Done, I hope it will be helpful to your question, if you are satisfied o( o...Ha ha.
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Anonymous users2024-02-084x/(x+a)>=1
4x/(x+a)-1>=0
3x-a)/(x+a)>=0
3x-a)(x+a)>=0
x-a/3)(x+a)>=0
Categorical discussion, if.
0, then x>a3 or x<-a
0, then x>-a or x, x is not equal to 0.
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Anonymous users2024-02-07Centimeter = meter.
90 56 cubic meters.
times 135 times.
Centimeter = meter 25 dm = meter.
52 cubic meters.
Block 40 20 = 40,000 cubic centimeters.
10 10 10 = 1000 cubic centimeters.
40,000-1,000 = 39,000 cubic centimeters.
39000 50 40 = centimeters.
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Anonymous users2024-02-061. Sand is required 90x56x (4 100) = cubic meters to be transported.
2. The volume of 52 x (45 100) x (25 10) = cubic meters requires bricks.
3. The volume of the iron block.
20x20x20 = 8000 cubic centimeters.
FRP bottom area.
50x40 = 2000 square centimeters.
Decrease 8000 2000 = 4 cm.
Water surface 20-4 = 16 cm.
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Anonymous users2024-02-051. So it takes 135 times.
2. 30420 bricks are needed.
3. The volume of a 10 cm square piece of iron is 10x10x10=1000 cubic centimeters.
1000 50 40 = centimeter So the water height is centimeter, the second question upstairs should be wrong, the others are correct solutions, and his equation is more specific than mine.
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Anonymous users2024-02-04*56* cubic meters), which needs to be rounded up to 135 times.
cubic meters), blocks.
10*10=1000 (cubic centimeters), 1000 50 40=centimeters), centimeters).
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Anonymous users2024-02-03Question 1: 90 56 135 times.
Question 2: 52
Question 3: (50 40 20 10 10 10) 50 40
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Anonymous users2024-02-021 All 1 Question Obviously, in order to keep the two liquids at the bottom of the U-shaped tube in equilibrium. The pressure of the two liquids at the bottom should be equal. The water surface is high meters.
According to p=pgh, the pressure is 2000 Pa. The density of kerosene is four-fifths of that of water, then kerosene should be high meters. That is, 5 cm above the water.
2. The speed of sound is 340 meters per second.
The sound of six seconds walked 2040 meters.
Subtracting 1110 meters, there are 930 meters, so we can see that the car is 930 meters away from the valley, and the car has traveled a total of 180 meters in six seconds.
30 meters per second.
3 questions g=pv=
f=540-400=140
Question 4: If it is a fixed pulley.
According to w=fs, it can be seen that 240j of work has been done.
If it's a movable pulley.
According to the above formula, it is labor-saving distance and the theme with movable pulley.
Still did 240J work.
The difference is. The distance is twice as long, and the force applied is half of the original, so the result remains the same as detailed enough, I hope the landlord will adopt it!!
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Anonymous users2024-02-012 t=6-（1110/340）
V car * 6 + 340 * t = 1110
Solution: v car = 30m s
3 g=pv=
f=540-400=140
1 and 4 are not pictured.
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