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Dmitriy789 [7]
4 years ago
5

Which determines the pitch of a sound? A. At the same wavelength, the sound with the most cycles per second will have the highes

t pitch. B. At the same amplitude, the sound with the most cycles per second will have the higher pitch. C. At the same wavelength, the sound with the fewest cycles per second will have the lowest pitch. D. At the same amplitude, the sound with the fewest cycles per second will have the higher pitch.
Physics
1 answer:
kipiarov [429]4 years ago
5 0
This would be known to be determined by its sound wave which would be the amplitude. The pitch of sound would actually be a little differenr in this matter. But know that we know and understand the sound wave of the pitch of sound, we know that this is done by amplitude.
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When switched on, the grinding machine accelerates from rest to its operating speed of 3550 rev/min in 10 seconds. When switched
Paraphin [41]

Answer:

During start total turns

N_1 = 296 turn

After half of the time total turns

N_3 = \frac{29.6 + 0}{2}(5) = 74 turns

Total number of turns during it stop

N_2 = \frac{59.17 + 0}{2}(31) = 917 turn

After half of the time total turns

N_4 = 688 turns

Explanation:

Initially the machine is at rest and then starts rotating with speed 3550 rev/min

now we will have

f = \frac{3550}{60} = 59.17 rev/s

now we know that it took 10 s to reach the speed

so angular acceleration is given as

\alpha = \frac{\omega_f - \omega_i}{t}

\alpha = \frac{59.17- 0}{10} = 5.917 rev/s^2

now it stops in 31 s so the angular deceleration is given as

\alpha_2 = -\frac{59.17}{31} = -1.91 rev/s^2

now initially number of turn to reach the given speed

N_1 = \frac{59.17 + 0}{2}(10) = 296 turn

number of turns during it stop

N_2 = \frac{59.17 + 0}{2}(31) = 917 turn

Now during startup speed after t = 5 s is given as

\omega_1 = (5.917)(5) = 29.6 rev/s

N_3 = \frac{29.6 + 0}{2}(5) = 74 turns

now during it stop the speed after half the time is given as

\omega_2 = 59.17 - (1.91)(15.5) = 29.56 rev/s

now the number of turns is given as

N_4 = \frac{59.17 + 29.56}{2}(15.5)

N_4 = 688 turns

5 0
3 years ago
How far does a sled travel in 5 seconds while accelerating from 4 m/s to 10 m/s?
mina [271]

Answer:

All we need to know for this is SUVAT equations. There are 5 SUVAT equations you need to learn. S = distance, U = initial velocity, V = final velocity, A = acceleration, T = time V= U + AT V^2 = U^2 + 2AS S = UT + 1/2AT^2 S = VT -

Explanation:

don't now if this hellps or not

3 0
3 years ago
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Xander's friend Corey has a skateboard that he rides at Newton's Skate Park.
DanielleElmas [232]

Answer:

0.5 m/s2

Explanation:

Step 1:

Data obtained from the question.

Total Mass = 60Kg

Net force = 30N

Acceleration =?

Step 2

Determination of the acceleration.

Force = Mass x Acceleration.

With the above equation, we can easily obtain the acceleration as follow:

30 = 60 x Acceleration

Divide both side by 60

Acceleration = 30/60

Acceleration = 0.5 m/s2

Now, we can thus say that the acceleration at that moment is 0.5 m/s2

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3 years ago
How much heat is required to convert 1 gm of ice into steam​
oksano4ka [1.4K]

Answer:

Heat required in converting 1g of ice at −10∘C into steam at 100∘C is: latent heat of fusion= 80 cal/g80 cal/g. latent heat of vaporization=540 cal/g.

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3 years ago
A 90-g bead is attached to the end of a 60-cm length of massless string. The other end of the string is held at point O, which i
Gekata [30.6K]
Hope this helps you.

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4 years ago
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