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Sonia

@Miggi

Inactive

Posted: 13 years ago

#591

A bubble with a volume of 1.0 cm^3 forms at the bottom of a lake that is 20.0 m deep. The temperature at the bottom of the lake is 10.0 degrees C. The bubble rises to the surface where the temperature is 25.0 degrees C. Assume that the bubble is small enough that its temperature always matches that of its surroundings.

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Sonia

@Miggi

Inactive

Posted: 13 years ago

#592

The Hubble Space Telescope has excellent resolving power because there is no atmospheric distortion of the light. The Hubble deep field camera uses the 2.4 m diameter mirror to collect light from distant galaxies that formed very early in the history of the universe. How far apart can two galaxies be from each other if they are 10 billion light-years away from Earth and are barely resolved by the Hubble Telescope using visible light with a wavelength of 400 nm?

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akhl

@akhl

Dazzler

Posted: 13 years ago

#593

Originally posted by: Miggi
A bubble with a volume of 1.0 cm^3 forms at the bottom of a lake that is 20.0 m deep. The temperature at the bottom of the lake is 10.0 degrees C. The bubble rises to the surface where the temperature is 25.0 degrees C. Assume that the bubble is small enough that its temperature always matches that of its surroundings.

V1 = 1.0 cm^3
T1 = 10.0 + 273 = 283 K
T2 = 25.0 + 273 = 298 K
P2 = atmospheric pressure = 1.0 x 10^5 Pa
P1 = P2 + rho * g * h = 1.0 x 10^5 + 1000 x 9.8 * 20 = 2.96 x 10^5 Pa

P2 V2/T2 = P1 V1/T1
V2 = V1 * (P1/P2) * (T2/T1)
V2 = 1.0 * [(2.96x10^5)/(1.0x10^5)] x (298/273)
V2 = 3.1 cm^3 (Answer)

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akhl

@akhl

Dazzler

Posted: 13 years ago

#594

Originally posted by: Miggi
The Hubble Space Telescope has excellent resolving power because there is no atmospheric distortion of the light. The Hubble deep field camera uses the 2.4 m diameter mirror to collect light from distant galaxies that formed very early in the history of the universe. How far apart can two galaxies be from each other if they are 10 billion light-years away from Earth and are barely resolved by the Hubble Telescope using visible light with a wavelength of 400 nm?

The distance = 1.22 * L * lambda/D
= 1.22 * 10 * 10^9 * 400 * 10^-9/2.4
= 2.0 * 10^3 light years (Answer)

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Sonia

@Miggi

Inactive

Posted: 13 years ago

#595

what would be the drawback to trying to diagnose an infectious disease by testing for the presense of specific antibodies in patient's serum?

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Sonia

@Miggi

Inactive

Posted: 13 years ago

#596

if 2micro liters of standard enzyme @ 2000microgram/mL is added on a slide how much ppm would this be??
if 2micro liter of 1% SDS is added what ppm would this be?

Edited by Miggi - 13 years ago

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akhl

@akhl

Dazzler

Posted: 13 years ago

#597

Originally posted by: Miggi
what would be the drawback to trying to diagnose an infectious disease by testing for the presense of specific antibodies in patient's serum?

Antibodies take a lot of time to form. Thefore, it is possible that a patient is be suffering from a disease but the antibody is not present in the patient's body. In that case, the diagnosis will be wrong.

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Sonia

@Miggi

Inactive

Posted: 13 years ago

#598

thanks akhl.. would u mind doing the other question as well??i am confused about it.

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akhl

@akhl

Dazzler

Posted: 13 years ago

#599

@Miggi,
Somehow the other question is not clear. Are you sure the questions are complete?
And are these two different questions?

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Sonia

@Miggi

Inactive

Posted: 13 years ago

#600

@ akhl: there are two separate questions and from what i can understand is that the solution is first diluted to 2000ug/ml and then 2uL of that solution is taken.we need to convert it to ppm i guess? same for the 2nd question.

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