Answer:
R = 545.38 m ; θ = 28.43°
Explanation:
given,
for town A : d₁ = 335 km at an direction of 20° north of east
for town B : d₂ = 245 km at 30.0° west of north from town A
x = 335 cos 20° + 245 sin 30°
x = 437.29 m
y = 335 sin 20° + 245 cos 30°
y = 326.75 m
R = 545.38 m
θ = 28.43°
From the calculations, the speed of sound in this case is 16.9 m/s.
<h3>What is an echo?</h3>
The term echo has to do with the reflection of sound waves. Sound is a mechanical wave.
we know that the speed of sound is obtained from;
V = 2x/t
x = distance covered
t = time taken
V = 2(500)/59
v = 16.9 m/s
The error in the experiment could come from;
- Lack of precise time measurement
- Error can also arise from the environment of the experiment
Learn more about echo:brainly.com/question/9527413
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Answer: B. Its randomness would increase
Explanation:
According to the <u>second law of thermodynamics</u>:
<em>"The amount of entropy in the universe tends to increase over time"</em>
<em />
That is, in any cyclic process, entropy will increase, or remain the same.
So, in this context, entropy is a thermodynamic quantity defined as a criterion to predict the evolution or transformation of thermodynamic systems. In addition, it is used to measure the degree of organization of a system.
In other words: Entropy is the measure of the disorder (or randomness) of a system and is a function of state.
Answer:
Radius = 0.8235 cm
Density = 0.7265 g/mL
Explanation:
Given that the volume = 2.34 cm³
The volume of the sphere = 
Thus,
<u>r = 0.8235 cm</u>
Volume = 2.34 cm³ = 2.34 mL (1 cm³ = 1 mL)
Mass = 1.7 g
<u>Density = Mass/ Volume = 1.7 g / 2.34 mL = 0.7265 g/mL</u>
