Answer:
The second step of the scientific method is the question being researched, the hypothesis. ... This hypothesis includes the explanation for the observation, it can be tested, and new conclusions may be reached. The third step of the scientific method is the experiment.
Explanation:
Answer:
a) The car was moving at a speed of
b) The negative sign of denotes that the observer is coming towards the police car which is the source of the sound.
c)
Explanation:
Given:
- original frequency of the source,
- speed of the source,
- velocity of the obstacle car be,
- speed of sound,
- observed frequency,
<u>Using the equation from the Doppler's effect:</u>
a)
The car was moving at a speed of
b)
The negative sign of denotes that the observer is coming towards the police car which is the source of the sound.
c)
Now when,
Then,
Using the Doppler's eq.:
<span>In physics, the law of conservation of energy states that the total energy of an isolated system remains constant—it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another. For instance, chemical energy can be converted to kinetic energy in the explosion of a stick of dynamite.</span>
Answer:
A
Explanation:
Snell's law states:
n₁ sin θ₁ = n₂ sin θ₂
where n is the index of refraction and θ is the angle of incidence (relative to the normal).
The index of refraction of air is approximately 1. So:
1 sin 30° = 1.52 sin θ
θ ≈ 19°