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Artyom0805 [142]
4 years ago
12

Please help me I have been struggling

Physics
1 answer:
disa [49]4 years ago
4 0
  1. High/low notes have high/low frequency, not high/low amplitude.
  2. Heartz measures the number of waves per second, not per hour.
  3. Sounds do not travel in space because it's empty
  4. Sounds make our eardrum vibrate. The diaphragm is the muscle we use to breathe.
  5. Soft, pale materials are best for sound proofing because they absorb the waves.
  6. In the next paragraph, ultrasound and infrasound are inverted (ultra means "over, above" and infra means "below").
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Number the steps for balancing equations: Use coefficients to increase the atoms on each side. Check to make sure you have the s
Sav [38]

Answer:

1.Identify the atoms on each side,

2. Count the atoms on each side,

3.Use coefficients to increase the number of atoms on each side,

4.Check to make sure you have same number of each type of atom on each side

Explanation:

THEY ALL RIGHT!!!!!!!!!

6 0
3 years ago
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A car traveling at 15 m/s starts to decelerate steadily. It comes to a complete stop in 10 seconds. What is it’s acceleration
tresset_1 [31]

So the initial velocity is 15 m/s, the final velocity is 0 since it's at a complete stop and time is 10 seconds.  Therefore:

Acceleration=\frac{v_{final}-v_{initial}}{t_{final}-t_{initial}} =\frac{0m/s-15m/s}{10s-0s} =-1.5\frac{m}{s^2}

Therefore, the acceleration is -1.5 m/s^2.  The reason it's negative is due to the fact that the vector is going against it's original movement since it's decelerating.

7 0
3 years ago
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A power cycle operates between hot and cold reservoirs at 1200 K and 300 K, respectively. At steady state the cycle develops a p
GenaCL600 [577]

Answer:

Explanation:

a ) Thermal efficiency = work output / heat input

= .38 MW / 1 MW = .38

OR 38%

Heat rejected at cold reservoir = heat input - work output

1 MW - .38 MW

= 0.62 MW.

b ) For reversible power output

efficiency = T₂ - T₁ / T₂   ; T₂ is temperature of hot reservoir and T₁ is temperature of cold reservoir.

= 1200 - 300 / 1200 = 900 / 1200

= .75

or 75%

rate at which heat is rejected

= 1 - .75 x 1

= .25 MW .

7 0
3 years ago
Mr. Griffith's car battery died, resulting in his car not being able to start. Mr. Griffith's roommates were all sleeping soundl
Firlakuza [10]

Answer:

it will take him 3 minutes.

Explanation:

8 0
3 years ago
As you watch a surfer ride a wave toward the shoreline what is the shoreline
Maslowich
B is the answer glad to help
4 0
3 years ago
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