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3 years ago

Short answer

1 answer:

4 0

A. you can separate the components through chromatographic techniques (GC or HPLC). The advatage of using a high-tech chromatography equipment is the simultaneous separation - contents analysis.

b. chromatography is an affinity based separation which means using specific adsorbents, it can separate the component with a higher affinity to the adsorbents.

c. the advantage of which is the precision as well as the simultaneous separation and contents analysis.

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In which of the following cases is work being done on an object? Question 2 options: Pulling a trailer up a hill Carrying a box

Taya2010 [7]

Work is done when a force acts on an object AND the object moves in the direction of the force.

-- <em>Pulling a trailer up a hill. YES. </em> The trailer is moving in the direction of the pulling force.

-- Carrying a box down a corridor. No. The box is not moving in the direction of gravity (down) OR in the direction of your arm (down the corridor).

-- Suspending a heavy weight with a strong chain, No. There's a force (gravity) acting on the weight, but the weight is not moving at all.

-- Pushing against a locked door. No. There's a force (your muscles) acting on the door, but he door is not moving at all.

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4 years ago

Read 2 more answers

The neurons of giant squids, for example, consist of axons with very large radii, which allows the squid to react very quickly w

Alinara [238K]

Answer:

100

Explanation:

$\rho_m$ = Resistivity of axon

r = Radius of axon

t = Thickness of the membrane

$\rho_a$ = Resistivity of the axoplasm

Speed of pulse is given by

$v=\sqrt{\dfrac{\rho_mrt}{2\rho_a}}$

So, radius is given by

$r=\dfrac{2\rho_a}{\rho_mt}v^2$

If radius is increased by a factor of 10 new radius will be

$r_2=\dfrac{2\rho_a}{\rho_mt}(10v)^2\\\Rightarrow r_2=100\dfrac{2\rho_a}{\rho_mt}v^2\\\Rightarrow r_2=100r$

So, The radius will increase by a factor of 100.

5 0

4 years ago

bonufazy [111]

Answer:

Pressure wil be greatest at R [coz due to capillary action, coz it's small cross-sectional area]

6 0

3 years ago

A girl who is watching a plane fly tells her friend that the plane isn't moving at all. Describe a frame of reference in which t

Dafna1 [17]

If the plane is far away and flying directly toward or away from
the girl, the plane would appear not to be moving. Also, the plane
would not be moving in the frame of reference of the people on
the plane. If you are matching speed and direction of the plane.

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3 years ago

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A truck accelerating at 0.0083 meters/second2 covers a distance of 5.8 × 104 meters. If the truck's mass is 7,000 kilograms, wha

anygoal [31]

<span>F = m*a = 7000kg * 9.8N/kg = 68,600 N.

68,600 N is your answer
</span>

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3 years ago