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3 years ago

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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The number of division on vernier scale is 20, Find the least count of the vernier calliper

Anna35 [415]

Answer:

0.2 mm

Explanation:

Assuming the Caliper has 1 mm marks on the main scale. Again, we assume that the 20 division coincides with the 16 main scale division, then we can find the least count by saying

For the given Vernier calipers,

Let one main scale division be = 1 mm.

Since there are 20 Vernier scale divisions that happen to be equal to 16 Main Scale Divisions, we can calculate that

1 Vernier Scale Division = 16/20 Main Scale Division

1 Vernier Scale Division = 0.8 mm.

The least count is finally calculated by saying that

Least Count = 1 Main Scale Division - 1 Vernier Scale Division

Least Count = 1 - 0.8

Least Count = 0.2 mm

Therefore, from the assumptions made above, the least count is 0.2 mm

5 0

3 years ago

An electric motor that transforms 1000 J of chemical potential energy into 975 J of kinetic energy and 25 J of wasted heat energ

Musya8 [376]

Answer:

97.5% I believe

Explanation:

My answer needs to be 20characters long so I'm typing this

8 0

3 years ago

A bicycle wheel is mounted on a fixed, frictionless axle, with a light string wound around its rim. The wheel has moment of iner

Stells [14]

Answer:

Explanation:

trying to find the inetria magnitude of the wheel

3 0

3 years ago

State any five branches of physics

prisoha [69]

Answer:

Thermodynamics
Quantum mechanics
Nuclear physics
Mechanics
Astrophysics

7 0

3 years ago

Read 2 more answers

A ball is thrown directly downward with an initial speed of 7.95 m/s, from a height of 29.0 m. After what time interval does it

Y_Kistochka [10]

Answer: after 1.75 seconds

Explanation:

The only force acting on the ball is the gravitational force, so the acceleration will be:

a = -9.8 m/s^2

the velocity can be obtained by integrating over time:

v = -9.8m/s^2*t + v0

where v0 is the initial velocity; v0 = -7.95 m/s.

v = -9.8m/s^2*t - 7.95 m/s.

For the position we integrate again:

p = -4.9m/s^2*t^2 - 7.95 m/s*t + p0

where p0 is the initial position: p0 = 29m

p = -4.9m/s^2*t^2 - 7.95 m/s*t + 29m

Now we want to find the time such that the position is equal to zero:

0 = -4.9m/s^2*t^2 - 7.95 m/s*t + 29m

Then we solve the Bhaskara's equation:

$t = \frac{7.95 +- \sqrt{7.95^2 +4*4.9*29} }{-2*4.9} = \frac{7.95 +- 25.1}{9.8}$

Then the solutions are:

t = (7.95 + 25.1)/(-9.8) = -3.37s

t = (7.95 - 25.1)/(-9.8) = 1.75s

We need the positive time, then the correct answer is 1.75s

4 0

4 years ago