Answer:
The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
Explanation:
The answer is 1.99 × 10⁻¹⁰ m.
To calculate this we will use De Broglie wavelength formula:
<span>λ = h/(m*v)
</span><span>λ - the wavelength
</span>h - Plank's constant: h = 6.626 × 10⁻³⁴ Js
v - speed
m - mass
It is given:
<span>λ = ?
</span>m = 9.11 × 10⁻²⁸<span> g
v = </span>3.66 × 10⁶<span> m/s
After replacing in the formula:
</span>λ = h/(m*v) = 6.626 × 10⁻³⁴ /(9.11 × 10⁻²⁸ * 3.66 × 10⁶) = 1.99 × 10⁻¹⁰ m
The sound wave travels faster at higher temperatures and slower at lower temperatures.
<h3>What will happen to the velocity of the wave if the temperature decreases?</h3>
At a lower temperature, particles of the medium are moving more slowly as compared to higher temperature. Due to lower temperature, longer time is required to transfer the energy of the sound waves.
So we can conclude that sound travels faster at higher temperatures and slower at lower temperatures.
Learn more about temperature here: brainly.com/question/25677592
Height of the platform = 100 feet
1 feet = 0.3048 m
100 feet = 30.48 m
Acceleration due to gravity (g) = 9.8 m/s^2
Let the time taken be t
Initial velocity of the object (u) = 0 m/s
Using the seconds equation of motion:
t = 2.5 seconds
Hence, the option (b) is correct.
