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Mrrafil [7]
2 years ago
14

On a guitar, the longest string vibrates slowly, and the shortest string vibrates very quickly. What conclusion can be made abou

t the sound that each string makes? A) The long string makes a loud sound and the short string makes a soft sound, because things that are longer make louder sounds. B) The long string makes a soft sound and the short string makes a loud sound, because things that are longer make softer sounds. C) The long string makes a high-pitched sound and the short string makes a low-pitched sound, because things that vibrate slowly have a higher pitch. D) The long string makes a low-pitched sound and the short string makes a high-pitched sound, because things that vibrate slowly have a lower pitch.
Physics
1 answer:
Nadya [2.5K]2 years ago
5 0

what's up? this answer is D. best of luck with your studies

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Answer:

by Multiply Force,change direction and speed multiply

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2 years ago
fuel was consumed at a certain rate of 0.05Kg\s in a rocket engine and ejected as a gas with a speed of4000m\s . Determine the t
ivann1987 [24]

Answer:

Thrust = 200 N

Explanation:

The engine thrust can be found by using the following formula:

Thrust = mv

where,

m = mass flow rate of the fuel = 0.05 kg/s

v = velocity of ejected gases = 4000 m/s

Therefore, using the given values in the equation, we get:

Thrust = (0.05\ kg/s)(4000\ m/s)

<u>Thrust = 200 N</u>

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Answer is in the file below

tinyurl.com/wtjfavyw

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2 years ago
The physiological need include:
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A

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2 years ago
A worker on the roof of a house drops his 0.46 kg hammer, which slides down the roof at constant speed of 9.88 m/s. The roof mak
nekit [7.7K]

Answer:

The horizontal distance travelled in that time lapse is 12.94 m

Explanation:

In order to solve this problem, we'll need:

  1. The horizontal speed
  2. the time the hammer takes to fall from the roof to the ground

At the lowest point of the roof, the hammer has a 9.88 m/s speed that makes an angle of 27° with the horizontal, so we can calculate the horizontal and vertical speed with trigonometry. If we take right as x positive and down as y positive we get

v_{x}=v*cos(27)=9.88 m/s *cos(27)=8.80 m/s \\v_{y}=v*sen(27)=9.88 m/s *sen(27)=4.49 m/s

Now, we make two movement equation as we have a URM (no acceleration) in x and an ARM (gravity as acceleration) in y. We will wisely pick the lowest point of the roof as the origin of coordinates

x(t)=8.8 m/s *t

y(t)=4.49m/s*t+\frac{1}{2}*9.8m/s^{2}*t^{2}

Now we calculate the time the hammer takes to get to the floor

17.1m=4.49m/s*t+\frac{1}{2}*9.8m/s^{2}*t^{2}\\t=1.47s or t=-2.38s

Now, we keep the positive time result and calculate the horizontal distance travelled

x(1.47s)=8.8m/s*1.47s=12.94m

3 0
3 years ago
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