To run a centrifuge correctly, you should:

1 answer:

7 0

Balance tubes by spacing them equally around the centrifuge and Always balance tubes with other tubes containing a same volume of liquid are right.
If you don't space them out equally, you will have a lot of broken glass to clean up...trust me. The same thing can happen if you don't have equal amounts of liquid in each tube, but it doesn't have to be exactly the same in every one.

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Does passing a magnet through a coil of wire break off it’s electric current

hichkok12 [17]

A magnetic field is actually generated by a moving current (or moving electric charge specifically). The magnetic field generated by a moving current can be found by using the right hand rule, point your right thumb in the direction of current flow, then the wrap of your fingers will tell you what direction the magnetic field is. In the case of current traveling up a wire, the magnetic field generated will encircle the wire. Similarly electromagnets work by having a wire coil, and causing current to spin in a circle, generating a magnetic field perpendicular to the current flow (again right hand rule).

So if you were to take a permenant magnet and cut a hole in it then string a straight wire through it... my guess is nothing too interesting would happen. The two different magnetic fields might ineteract in a peculiar way, but nothing too fascinating, perhaps if you give me more context as to what you might think would happen or what made you come up with this question I could help.

Source: Bachelor's degree in Physics.

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3 years ago

Alicia drew a pentagon with equal side length and equal angles.Then she added red lines of symmetry to her drawing. How many lin

IRISSAK [1]

The sum of angles in a regular pentagon is
180*(5 - 2) = 540°
Each internal angle is 540/5 = 108°.

Each vertex creates a line of symmetry to the midpoint of the opposite side,
as shown in the figure.

Answer: 5 lines of symmetry.

7 0

3 years ago

Calculate [H3O+<br><br>] of a 0.150 M acetic acid solution.

Butoxors [25]

Answer:

[H3O+] = 0.00520 M

Explanation:

The dissociation of acetic acid in water is given by the equation;

CH3COOH + H2O<-------> H3O+ + CH3COO-

ka = [H+][C2H3O2-]/[HC2H3O2]

Ka = 1.8 x 10^-5

= x^2 / 0.150-x

x = [H3O+]= 0.00520 M

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4 years ago

You short-circuit a 18 volt battery by connecting a short wire from one end of the battery to the other end. if the current in t

mina [271]

The relationship between the voltage and the current in the circuit is:
$\Delta V = RI$
where $\Delta V$ is the voltage difference, R the resistance of the circuit (and therefore, the resistance of the battery) and I the current flowing in the circuit. By using I=19 A and $\Delta V = 18 V$ , we can find the internal resistance of the battery:
$R= \frac{\Delta V}{I}= \frac{18 V}{19 A}=0.95 \Omega$

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4 years ago

Astronauts often undergo special training in which they are subjected to extremely high centripetal accelerations. One device ha

egoroff_w [7]

The centripetal acceleration of an object is given by the relation,

$Ac =V^2/R$