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gayaneshka [121]
3 years ago
7

Which of these questions are unit rates?

Physics
1 answer:
olga_2 [115]3 years ago
8 0
B because it is basically 12 km/ hour
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How to calculate depth of sea whan a ship receives sound produced by its fathometer after 3.5 second
HACTEHA [7]

Answer:

2600 m

Explanation:

A fathometer produces a sound wave and then detects the echo.  It takes 3.5 seconds for the echo to reach the ship, so that means it takes half the time (1.75 seconds) to reach the ocean floor.

The speed of sound in seawater is approximately 1500 m/s, so the depth of the ocean at that point is:

d = 1500 m/s × 1.75 s

d = 2625 m

Rounding to two significant figures, the depth is approximately 2600 m.

5 0
3 years ago
Read 2 more answers
Much of the bedrock in Virginia’s Piedmont region, originally formed by cooled magma, has re-crystallized under a great deal of
3241004551 [841]

A) gneiss

Explanation:

The likely rock that would be found here is gneiss.

A rock type that forms under a great deal of temperature and pressure is a metamorphic rock.

Such rocks would have their minerals crystallized when subjected to these extreme conditions.

  • Metamorphic rocks are changed rocks that are formed when minerals in rocks are subjected to extreme pressure and temperature before they start melting.
  • These rock type can form from either sedimentary or igneous rocks. In fact a metamorphic rock can also change into another one.
  • Examples of metamorphic rocks are gneiss, schist, hornfels, marble etc.

Halite, limestone and sandstone are examples of sedimentary rocks that forms by the accumulation of sediments or precipitation of ions form solutions.

learn more:

Metamorphic change brainly.com/question/869769

#learnwithBrainly

6 0
3 years ago
Predict the energy transformation that occurs when carson sands a piece of wood with sandpaper.
tigry1 [53]

Answer:

Explanation:

The hand provides Kinetic Energy in moving.

The KE is transformed to Frictional energy

The Frictional Energy can produce heat and light energy.

The sandpaper produces little shreds from the grit of the paper.

The shreds have KE (they move)

6 0
2 years ago
"a musical tone sounded on a piano has a frequency of 261.6 hz and a wavelength of 1.31 m. what is the speed of the sound wave
Andreyy89
To solve this question, we use the wave equation which is:
C=f*λ
where:
C is the speed;
f is the frequency;
λ is the wavelength
So in this case, plugging in our values in the problem. This will give us:
C = 261.6Hz × 1.31m
= 342.696 m/s is the answer.
7 0
3 years ago
Read 2 more answers
Who can help me for this question plz:(
Vanyuwa [196]
Force = mass x acceleration

15 = mass x 4

Mass = 15/4

Mass = 3.75 Kg
8 0
3 years ago
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