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centrifuge tube uses Riddles

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Used to Threaten
Riddle:
Used to threaten, used to defeat. Sometimes it grows, sometimes it shrinks. Used to conquer, used to protect. It marks your downfall, it marks your success. The true god of war, the creator of mess. What is it?
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Useful When Broken
Riddle:
What is more useful when it is broken?
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Used for Cutting
Riddle:
I'm white, and used for cutting and grinding. When I'm damaged, humans usually remove me or fill me. For most animals I am a useful tool. What am I?
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You Use a Knife
Riddle:
You use a knife to slice my head and weep beside me when I am dead. What am I?
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Makes But Doesn't Use
Riddle:
Someone makes it, but has no need of it. Someone buys it, but has no use for it. Someone uses it, but can neither see nor feel it. What is it?
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Break Before Use
Riddle:
What do you break before you use it?
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Some Will Use Me
Riddle:
Some will use me, while others will not, some have remembered, while others have forgotten. For-profit or gain, I'm used expertly, I can't be picked off the ground or tossed into the sea. Only gained from patience and time, can you unravel my rhyme? What am I?
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Of No Use to One
Riddle:
Of no use to one Yet absolute bliss to two. The small boy gets it for nothing. The young man has to lie for it. The old man has to buy it. The baby’s right, The lover’s privilege, The hypocrite’s mask. To the young girl, faith; To the married woman, hope; To the old maid, charity. What am I?
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Throw Out When Use
Riddle:
What do you throw out when you want to use it, but take in when you don't?
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A King Who Uses Electricity
Riddle:
I use electricity and I killed my father. I am a king. I have a lot of girlfriends, but I also have a wife. Who am I?
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A Term Used to Confirm
Riddle:
I am a term used to confirm. But take away my front, my face, I become known as human avarice.
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Black When You Buy It, Red When You Use It
Riddle:
What is black when you buy it, red when you use it, and gray when you throw it away?
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The US Presidents
Riddle:
How could the 22nd and 24th presidents of the United States have the same parents, but weren't brothers?
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You can hold it without using your hands
Riddle:
You can hold it without using your hands or your arms. What is it?
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What belongs to you, but other people use it more than you do?
Riddle:
It belongs to me, but other people use it more than me. What is it?
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No Matter How Little Or How Much You Use Me
Riddle:
No matter how little or how much you use me every day, you change me every month. What am I?
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It Belongs to You...
Riddle:
What belongs to you, but other people use it more than you?
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Soccer Players In School
Riddle:
Why do soccer players do well in school?
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Counting Cows
Riddle:
Why is it easier to count cows than sheep?
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The Pope has it
Riddle:
The Pope has it but he does not use it. Your father has it but your mother uses it. Nuns do not need it. Your lady friend's husband has it and she uses it. What is it?
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A True Equation
Riddle:
Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.
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Concealing What's True
Riddle:
I am good at concealing what's real and hide what's true. Sometimes, I bring out the courage in you! What am I?
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Very Little Creatures
Riddle:
We are very little creatures; all of us have different features. One of us in glass is set; one of us you’ll find in jet. Another you may see in tin, and a fourth is boxed within. If the fifth you should pursue, it can never fly from you. What are we?
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Sands of Time
Riddle:
The prisoner was locked up in a room with a dirt floor. The room has one window, which is high up above the prisoner's height. The prisoner had a shovel, but he had only 2 days to get out, and digging would take him more than 5. How would he escape?
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