Answer:
5.65 times
Explanation:
60 db sound is equal to 60 phons sound when frequency is kept at 1000Hz.
But when the frequency of sound is changed to 100 Hz , according to equal loudness curves , the loudness level on phon scale will be 35 phons.
A decrease of 10 phon on phon- scale makes sound 2 times less loud
Therefore a decrease of 25 phons will make loudness less intense by a factor equal to 2²°⁵ or 5.65 less intense . Therefore intensity at 100 Hz
must be increased 5.65 times so that its intensity matches intensity of 60 dB sound at 1000 Hz frequency.
The magnitude of the acceleration in the y-direction is
Explanation:
When a projectile is fired into the air, there is only one force acting on it (neglecting air resistance): the force of gravity, which pulls the projectile downward with a force of
F = mg
where m is the mass of the projectile and is the magnitude of the acceleration of gravity. This force acts along the y-direction, downward.
Since there are no other forces acting, therefore, the motion of the projectile consists of two separate motions:
- A uniform motion along the x-direction, with constant velocity
- A uniformly accelerated motion along the y-direction, with constant acceleration ()
So, the magnitude of the acceleration in the y-direction is .
Learn more about projectile motion:
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Which conditions I think you have place an incorrect image?
Answer:
1.Stress is a feeling that's created when we react to particular events.
2. What signals the adrenal glands to produce more of the hormones adrenaline and cortisol and release them into the bloodstream?hypothalamus. ... 3. When the adrenal glands produce more of the hormones adrenaline what are two of the body’s reaction to these additional hormones:heart rate speeds up and sweat is produced. 4.the stress response the bodies natural way of dealing with anxiety. 5. the events that provoke stress are job issues or retirement. lack of time or money. grief. family problems. The article talks about building up your resilience to cope with stress. What does resilience mean? the capacity to recover quickly from difficulties. 6. What are two ways that you can control stress? be realistic and get a good night's sleep.