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Virty [35]
3 years ago
9

How did people years ago find out which side of a magnet was north and which was south?

Physics
1 answer:
wlad13 [49]3 years ago
5 0
In 1600 when William Gilbert published De Magnete
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Talja [164]

This is a vector subraction problem.

5 0
3 years ago
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A trombone has a variable length. When a musician blows into the mouthpiece and causes air in the tube of the horn to vibrate, t
Lilit [14]

Answer:

The frequency increases.

Explanation:

When the Musician draws the slide in the length of the horn gets shorter, which causes a decrease in the wavelength. A decrease in the wave length results in an increase in frequency.

Note:

The diameter of the horn has an effect on frequency, so a wider horn is effectively a long horn - open end correction ( distance between the the antinode and the open end of a pipe).

Frequency also depends on how hard the musician blows the trombone. The musician can change the frequency with the lip pressure being applied.

6 0
3 years ago
What sound signal tells a river lock attendant that you wish to go through the lock?
Hoochie [10]
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You should wait about 400 feet away from the lock and wait for the flashing light signal that allows you to enter.
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6 0
4 years ago
When you push a 1.90-kg book resting on a tabletop, you have to exert a force of 2.10 N to start the book sliding. Once it is sl
zimovet [89]
Static frictional force = ƒs = (Cs) • (Fɴ)
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              2.26 = (Cs) • (1.85) • (9.8)
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kinetic frictional force = ƒκ = (Cκ) • (Fɴ)
              1.49 = (Cκ) • m • g
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           Cκ = 0.0822 
3 0
3 years ago
Many processes help to shape Earth’s surface. Starting with a rock, in what order would you expect the following Earth processes
GuDViN [60]
<span>Like most Earth materials, rocks are created and destroyed in cycles. The rock cycle is a model that describes the formation, breakdown, and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. </span><span>All rocks are made up of minerals. A mineral is defined as a naturally occurring, crystalline solid of definite chemical composition and a characteristic crystal structure. A rock is any naturally formed, nonliving, firm, and coherent aggregate mass of solid matter that constitutes part of a planet. i don't know if this is right but i hope it helps</span>
3 0
3 years ago
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