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Allisa [31]
3 years ago
10

Place test tubes containing approximately equal volumes in opposite positions on the rotor. Wait until all positions on the roto

r contain a test tube before activating the centrifuge. Never put stoppers or other items in the centrifuge with your tubes. Carefully stopper the test tubes to ensure the liquids do not spill out. (b) When operating the centrifuge, students should do which of the following? Make sure that the lid is completely shut and the safety knob is turned to engage the safety switch. Centrifuge for approximately 30 minutes. Centrifuge for approximately 30 seconds. Mid-way through the process, open the lid of the centrifuge and check to be sure it is operating. (c) When the centrifuge process is complete, students should do which of the following? Wait for the rotor to come to a complete stop before attempting to remove your test tubes. Using the eyehole on top, monitor the spinning rate and open the lid only after the rotor has slowed significantly. Immediately open the lid of the centrifuge to remove the test tubes before they are damaged. Reach out and carefully slow the rotor with your hand so you may finish the lab faster.
Engineering
1 answer:
Anvisha [2.4K]3 years ago
3 0

Answer:

do it

Explanation:

they are giving you step by step instructions to do. i woul hate to have to work with you out anywhere in the world if you have to ask this. i am 15, and i would at least read the d a m n thing before i post it.

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A selective medium, a differential medium, and a complex medium.

Explanation:

A selective media is a microbiological media which only support the growth of a particular specie or types of species of microorganisms,this media acts in such a way to inhibit or hinder the growth of other microorganisms.

Differential media are media that acts to Identifying particular strains of microorganisms of similar species.

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5 0
3 years ago
What is the probability that Tina will NOT wear a white t-shirt on the first day of her trip?
katrin2010 [14]

Answer:

4/5

Explanation:

She is not wearing white t-shirt on the first day so she is wearing the other 4 t-shirt

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3 years ago
Which of the following best describes the relationship between the World Wide Web and the Internet? А The World Wide Web is a pr
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Answer:

C

Explanation:

5 0
3 years ago
An FPC 4 m2 in area is tested during the night to measure the overall heat loss coefficient. Water at 60 C circulates through th
sp2606 [1]

Answer:

<em> - 14.943 W/m^2K  ( negative sign indicates cooling ) </em>

Explanation:

Given data:

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temp of water = 60°C

flow rate = 0.06 l/s

ambient temperature = 8°C

exit temperature = 49°C

<u>Calculate the overall heat loss coefficient </u>

Note : heat lost by water = heat loss through convection

m*Cp*dT  = h*A * ( T - To )

∴ dT / T - To = h*A / m*Cp  ( integrate the relation )

In ( \frac{49-8}{60-8} ) =  h* 4 / ( 0.06 * 10^-3 * 1000 * 4180 )

In ( 41 / 52 ) = 0.0159*h

hence h = - 0.2376 / 0.0159

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7 0
3 years ago
How should you move your board through the planer? (Pick two choices.)
iragen [17]

Answer:

I would say do it at an even pace

Explanation:

Doing it a slow pace takes time quickly will probably not to good gor you and doing it at an irregular pace is just way to fast

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