Answer:
Sound energy wave is transferred through a substance as a series of compressions.
Explanation:
Sound is caused by regular oscillating that produce regions of compression (high pressure) and rarefaction (low pressure) that move through a substance. Sound not only travels through air, it can travel through any substance, solid, liquid or gas. Whales can hear other whales across whole oceans through water, an Earthquake is low frequency sound moving through the solid Earth
A vibrating object compresses the air and sound waves move from the source, much like waves in water if you drop a stone into it. These sound waves can carry great distances depending on their loudness and frequency.
Based on what we know, we can confirm that the wave behavior being observed when light passes through media of different densities is refraction.
<h3>What is refraction?</h3>
This is a term used to explain the behavior of light as it moves through distinct mediums. This behavior includes a change in direction of the light due to its change in speed.
Therefore, the wave behavior being observed when light passes through media of different densities is refraction.
To learn more about light waves visit:
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Answer:
Correct, is there another part to the question?
Answer:
2.4 × 10⁵ cal
Explanation:
Step 1: Given data
- Initial temperature: 20°C
- Specific heat capacity of water (c): 1 cal/g.°C
Step 2: Convert the mass to grams
We will use the relationship 1 kg = 1,000 g.
Step 3: Calculate the change in the temperature
Step 4: Calculate the heat required (Q)
We will use the following expression.
Answer:
a) 1417 Hz
b) 1314 Hz
Explanation:
The euqation for the Doppler effect frequency shift is:
Where:
c: speed of sound (343 m/s in normal atmospheric conditions at sea level)
vr: speed of the receiver (negative if moving away from source, positive otherwise)
vs: speed of the source (positive if moving away from receiver, negative otherwise)
For the case of a standing observer:
120 km/h = 33.3 m/s
For the case of the car travelling at 90 km/h:
90 km/h = 25 m/s
