True: a scientific fact is something that is absolute and unchanging.
Gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.
Potential energy is the energy by virtue of object's height & kinetic energy by virtue of it's motion!
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Answer:
14.32 Hz
Explanation:
Given:
Frequency of the horn, f₀ = 395 Hz
Speed of the car, v = 12.0 m/s
Speed of the sound, c = 343 m/s
now, applying the doppler's effect formula, we have
where,
f is the observed frequency
on substituting the values, we get
or
f = 409.32 Hz
therefore,
the beat frequency heard is = f - f₀ = 409.32 - 395 = 14.32 Hz
A high-mass star has layers that are arranged in order of b. Temperature for fusion.
<h3>What is the temperature of fusion?</h3>
The temperature at which a substance transforms from a solid to a liquid is known as its melting point. The solid and liquid phases are in equilibrium at the melting point. Pressure affects a substance's melting point, which is typically reported at a standard pressure such 1 atmosphere or 100 kPa. There are two main categories of fusion reactions: those that maintain the ratio of protons to neutrons and those that convert protons to neutrons. The solid-liquid and liquid-to-gas transitions are connected with the typical heats of fusion and vaporization, respectively, for each substance.
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