Laboratory Instruments » Change

If A Medical Assistant Wanted To Change And Become A Dental Assistant Would More School Be Required? How Much?

admin — Sat, 13 Feb 2010 15:37:18 +0000

I am finishing a Medical Assisting Program and am considering changing to dental hygiene but first would like to become a dental assistant. Would more school be required? If so how much? Thank You

Which Of The Following Is Only A Physical Change? Please Explain Why.?

admin — Tue, 05 Jan 2010 21:36:59 +0000

a) decomposition of a dead organism
b) roasting a marshmallow
c) centrifuging blood to separate the components
d) combustion of firewood

What Is The Entropy Change?

admin — Sat, 02 Jan 2010 21:37:50 +0000

0.1 mole of oxigen O2 inside a centrifuge is maintained at
constant temperatue T = 300K. What is net change of entropy
of the gas when the speed of centrifuge is increased from
0 to 3000RPM? The centrifuge is a cylider d=20cm, h = 10cm.

Change In Gravitational Pull With Lattitude?

admin — Sat, 26 Dec 2009 03:36:18 +0000

Earth, assuming that it were a perfect sphere (even though it’s not) has the same gravitational pull at every point, right? Well, it is also spinning.
According to the answers to a question i asked just a little bit ago, it is spinning at around 1,000 mph at the equator. But, at the poles, if you were to stand at either of the pulls, you wouldn’t be spinning at 1,000 mph but just being rotated very slowly.
When a substance is spun, say in a centrifuge or in a bowl or whatever, the substance moves away from the center.
Thus, at the equator you would be pulled down by gravity and at the same time spun away, but at the poles you wouldn’t have this outward force.
So, both logically and practically, is there a difference in weight at different lattitudes based on these facts?

The Gradual Change In The Characteristics Of A Species Over A Period Of Time Is?

admin — Sat, 12 Dec 2009 03:36:20 +0000

A) homeostasis B) growth C) stimulus D) evolution
Any structure, behavior, or internal process that enables an organism to better survive in its environment is?
A) a stimulus B)an adaptation C) a response D) growth
All of the following are characteristics of living things EXCEPT they
A)have an orderly structure B)produce offspring C)grow and develop D)remain the same despite change in their environment
the instrument used to see small details of a speicman is the?
A)cylinder B)centrifuge C)spectrophotometer D)microscope