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3 years ago

(I) A centrifuge accelerates uniformly from rest to 15,000 rpm in 240 s. Through how many revolutions did it turn in this time

Physics

1 answer:

ddd [48]3 years ago

8 0

Answer:

θ = ω0 t + 1/2 ω t^2 = 1/2 α t^2 since it starts from rest

α = (15000 / 60) / 240 = 250 / 240 = 1.04 rev/sec^2

Note that α is in rev/sec^2

T(otal) = 1/2 * 1.04 * 240^2 = 30,000 revolutions

Check:

Average RPM = (15000/2) = 7500 rev/min = 125 / sec

125 / sec * 240 sec = 30,000 rev

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Choose two forces and compare and contrast these forces. These must be different forces than used in the prior question. Provide

marin [14]

Answer:

Explanation:

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Order of strength from weakest to strongest: Gravity, Weak Nuclear Force, Electromagnetism, Strong Nuclear Force

Type of Range:

Gravity - Unlimited range

Weak Nuclear Force - Limited range

Electromagnetism - Infinite range

Strong Nuclear Force - Limited Range

Found in:

Gravity - Exists between all objects with mass

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3 years ago

A transformer consists of a 500 turn primary coil and a 2000-turnsecondary coil. If the current in the secondary is 3.0A, what i

Neporo4naja [7]

Answer:

The correct solution will be "12.0 A".

Explanation:

The given values are:

$N_p= 500 \ turn$

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By using the transformer formula, we get

⇒ $\frac{N_p}{N_s} =\frac{I_s}{I_p}$

⇒ $I_p = I_s\times \frac{N_s}{N_p}$

On substituting the given values, we get

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3 years ago

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Klio2033 [76]

Answer:

Crystal structure

Explanation:

The repeated pattern of similar particles in a material is called crystal. Crystal structure is the largest constituent unit of a solid matter.

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3 years ago

Weigt A box sitting still on the ground by itself has a weight of 700N, what is the mass? (gravity's acceleration is 9.80 m/s2)

Alex

Force=700N
Acceleration=9.8m/s^2

Using newtons law

$\\ \rm\longmapsto F=ma$

$\\ \rm\longmapsto m=\dfrac{F}{a}$

$\\ \rm\longmapsto m=\dfrac{700}{9.8}$

$\\ \rm\longmapsto m=71.4kg$

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3 years ago

A 388 Hz tuning fork is resonating in a closed tube on a warm day when the speed of sound is 346 m/s. What is the length of the

Marizza181 [45]

Answer:

Explanation:

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4 years ago

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