science

Log (unit)

Log (unit) is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Log (unit) rather than just read about it. In short: A log (Hebrew לוג or וג, Romanized lōḡ) is a biblical and halakhic unit of liquid volume. The word log occurs in the Bible, in Lev. 14:10, 15, 21 which prescribes the korban (asham, "guilt-offering") of a poor metzorah: ואם דל הוא ואין ידו משגת ולקח כבש אחד אשם לתנופה לכפר עליו ועשרון סלת אחד בלול בשמן למנחה ולג שמן And if he be poor, and his means suffice not, then he shall take one he-lamb for a guilt-offering to…

Key takeaways

Log (unit) belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Log (unit) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Log (unit) from memory before moving on to harder problems.

Reference excerpt

ואם דל הוא ואין ידו משגת ולקח כבש אחד אשם לתנופה לכפר עליו ועשרון סלת אחד בלול בשמן למנחה ולג שמן And if he be poor, and his means suffice not, then he shall take one he-lamb for a guilt-offering to be waved, to make atonement for him, and one tenth part of an ephah of fine flour mingled with oil for a meal-offering, and a log of oil;

Unit definition, conversion, mnemonics and supports The Talmud, citing the gematria of an extra scriptural word ZeH "this," which equals twelve (seven plus five), explains that one hin is twelve log:

הין תריסר לוגי הויין דכתיב (שמות ל, כד) שמן זית הין וכתיב (שמות ל, לא) שמן משחת קדש יהיה זה לי לדורותיכם זה בגימטריא תריסר הויין: The Gemara elaborates: Now, one hin is twelve log, as it is written: “And of olive oil a hin” (Exodus 30:24), and it is written afterward in the same verse: “Sacred anointing oil, this [zeh] shall be for Me, throughout your generations.” The numerical value [gematria] of zeh is twelve. The Mishnah immediately preceding, which this Gemara comes to explain, states that a half-hin is six log. Thus a hin is twelve log. A list of conversions follows:

1 hin (הִין hîn) = 12 logs 1 log = 6 Beitzah (egg) The log is believed to have been equal to a little over 500 ml (17 US fl oz); thus, a hin was a little over 6 L (1.6 US gal).

See also Biblical and Talmudic units of measurement

References

Illustrations

Worked examples

Example 1 — a first encounter with Log (unit)

Start with the simplest possible case. Write down what Log (unit) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Log (unit) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Log (unit) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Log (unit)

In research: Log (unit) appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Log (unit) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Log (unit) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Judaism stubs, Obsolete units of measurement, Unit of measurement stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Log (unit) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Log (unit) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Log (unit) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Log (unit) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Log (unit) in simple terms?

A log (Hebrew לוג or וג, Romanized lōḡ) is a biblical and halakhic unit of liquid volume. The word log occurs in the Bible, in Lev. 14:10, 15, 21 which prescribes the korban (asham, "guilt-offering") of a poor metzorah: ואם דל הוא ואין ידו משגת ולקח כבש אחד אשם לתנופה לכפר עליו ועשרון סלת אחד בלול…

Why does Log (unit) matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Log (unit)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Log (unit).