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RSB [31]
4 years ago
11

Which of the following is true of physical properties? Physical properties include properties like mass, color, and flammability

. Physical properties cannot be observed without changing the identity of the material. Physical properties include properties like density, melting point, and ductility. Physical properties describe the potential for the material to undergo a reaction.
Physics
1 answer:
nataly862011 [7]4 years ago
6 0

Answer:

B) Physical properties cannot be observed without changing the identity of the material.

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Two boats are anchored in the harbor, separated by a horizontal distance of 18 m. The boats bob up and down as waves enter the h
sineoko [7]
<h2><u>Given</u>:</h2>

Horizontal distance between two boats = x = 14 m

One boat is at trough, the other is at crest.

As there is no crests between them meaning the boat are next to each other.

Wavelength is the distance between two consecutive crests/troughs = w

The distance between a crest and a trough next to it = w/2

Complete cycles = c = 5

Time taken for c cycles = t = 15 s

Vertical distance between two boats = y = 2.4 m

<h2><u>To find</u>:</h2>

wavelength = w = 2x = 28 m

Amplitude =  A = Displacement from mean to extreme position = y/2 = 1.2 m

Time period for one cycle = T = t/c = 15/5 = 3 s/cycle

frequency = 1/T = 1/3 = 0.33 hertz

speed = wavelength/Period = w/T = 28/3 = 9.33 m/s

4 0
3 years ago
Distinguish between the two main types of mechanical waves
jenyasd209 [6]

Explanation:

Mechanical waves are waves that requires a medium for their propagation. There are two types of mechanical waves:

  • Transverse waves
  • Longitudinal waves

Transverse waves are waves that propagates perpendicularly to their source. Examples are electromagnetic waves, ripple on water etc.

Longitudinal waves are waves that propagates parallel to their source. They move in a series of rarefactions and compressions along their path. An example is seismic p-waves

5 0
3 years ago
6. A 4 kg object hangs below a 6 kg object by a string of negligible mass. If the 6 kg object is pulled upward by a force of 440
MrRissso [65]

Answer:

T =176 N

Explanation:

from diagram

F -(m_1+m_2_g) = (m_1+m_2_g)a

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a =\frac{440-10*9.8}{10}

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T -m_2g =m_2a

T = m_2(g +a)

T = 4(9.81+34.2)

T =176 N

7 0
4 years ago
The grant that considered the foundation of financial aid is the:
navik [9.2K]

Answer:

I think it is the Federal Pell Grant Program.

Explanation:

4 0
3 years ago
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Describe the responses of the human ear to sound waves coming from the
maria [59]

If the sound comes from the right side, the waves reach the right ear before the left ear. if the sound comes from the left side, the waves reach the left ear before the right ear. The difference between the phases of waves reaching both ears is detected by the ears and then interpreted by the brain

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