Brzina centrifugiranja je visoka; centrifugiranje traje kratko.

It is a noun, specifically a verbal noun built from the verb centrifugirati (“to spin” in the washing-machine sense, “to centrifuge”).

So in this sentence:

• centrifugiranje = spinning / spin cycle
• brzina centrifugiranja = the speed of spinning / spin speed

Grammatically, centrifugiranje is neuter singular.

Because centrifugiranja is in the genitive case.

After many nouns in Croatian, another noun is often put in the genitive to show a relationship similar to English of. So:

• brzina = speed
• centrifugiranja = of spinning

Together:

• brzina centrifugiranja = speed of spinning

This is a very common pattern in Croatian:

• vrijeme kuhanja = cooking time
• temperatura vode = water temperature
• boja auta = color of the car

So here, centrifugiranja is the genitive singular form of centrifugiranje.

Because it agrees with brzina, which is a feminine noun.

In Croatian, adjectives must agree with the noun they describe in:

• gender
• number
• case

Here:

• brzina = feminine singular nominative
• so the adjective must also be feminine singular nominative
• therefore: visoka

Compare:

• brzina je visoka = the speed is high
• program je dug = the program is long
• vrijeme je kratko = the time is short

Because kratko here is being used as an adverb, not as an adjective.

With the verb trajati (“to last”), Croatian often uses an adverb meaning briefly / for a short time:

• traje kratko = it lasts a short time / it does not last long

So:

• kratak / kratka / kratko as an adjective describes a noun
• kratko as an adverb describes a verb

Compare:

• kratak program = a short program
• program traje kratko = the program lasts a short time

This is very natural Croatian.

Because the two clauses have different types of predicates.

In the first clause:

• Brzina centrifugiranja je visoka.
• Literally: The speed of spinning is high.

Here visoka is an adjective, so Croatian needs the copula je (“is”).

In the second clause:

• centrifugiranje traje kratko
• Literally: spinning lasts briefly / for a short time

Here traje is already the main verb, so no extra je is needed.

So:

• X je visok/o/nisko... = X is high/low/etc.
• X traje... = X lasts...

Because Croatian does not have articles like English a / an / the.

So:

• brzina can mean speed, a speed, or the speed
• centrifugiranje can mean spinning, a spin cycle, or the spin cycle

The exact meaning depends on context.

That is why Brzina centrifugiranja je visoka can naturally mean:

• The spin speed is high or
• Spin speed is high

The semicolon ; joins two closely related independent clauses.

Here it separates:

• Brzina centrifugiranja je visoka
• centrifugiranje traje kratko

Both clauses could stand alone as full sentences, but the semicolon shows they belong together as related information.

You could also write:

• Brzina centrifugiranja je visoka. Centrifugiranje traje kratko.

That would also be correct, but the semicolon makes the connection tighter and can sound a bit more formal or technical.

Yes, Croatian word order is fairly flexible, although the given version is the most neutral and natural in this context.

Neutral order:

• Brzina centrifugiranja je visoka; centrifugiranje traje kratko.

Other possible orders might be:

• Visoka je brzina centrifugiranja.
• Kratko traje centrifugiranje.

These are grammatically possible, but they change the emphasis:

• Visoka je... emphasizes high
• Kratko traje... emphasizes short duration

For a plain descriptive statement, the original wording is the best choice.

No, they are related but not the same.

• centrifuga usually means the machine or sometimes the spin function/device
• centrifugiranje means the process of spinning or the spin cycle

So in this sentence, centrifugiranje is better because the sentence talks about:

• the speed of spinning
• how long the spinning process lasts

not about the machine itself.

Yes. A few similar possibilities are:

• centrifugiranje ne traje dugo = spinning does not last long
• centrifugiranje traje kratko vrijeme = spinning lasts a short time
• trajanje centrifugiranja je kratko = the duration of spinning is short

The original centrifugiranje traje kratko is concise and natural, especially in technical or product-description language.

A good way to break it down is:

1. Brzina centrifugiranja
   = spin speed
   literally: speed of spinning

2. je visoka
   = is high

3. centrifugiranje traje kratko
   = the spin cycle lasts a short time

So the sentence has two linked statements:

• The spin speed is high
• The spin cycle is short / lasts a short time

That makes it a very typical informational Croatian sentence: compact, clear, and noun-heavy in the first clause, then more verbal in the second.