loudness is directly proportional to amplitude.
so, if amplitude is increased there will be an increase in loudness.
Answer:
Barret True, the speed decreases with increasing time
Explanation:
The equation they give us to describe the movement is of the form
y = yo + v₀ t + ½ a t²
The given equation is
y = -4 - 9 t + 2 t²
We can match term to term and find the constants
y₀ = -4 m
v₀ = -9 m / s
a = 2 m / s²
With this data we can build the equation of speed and time
v = v₀ + a t
v = - 9 + 2 t
With this expression we see that as time increases the speed decreases since the speed and acceleration have direction is opposite
Now we can analyze the students' observations
Amadeo False, we see that the behavior is the opposite
Barret True, the speed decreases with increasing time
Chinue False With the equation we have all the data to build the speed equation as a function of time
You would know the period of the planets orbit.
Answer:
Explanation:
The equation that relates heat Q with the temperature change 
of a substance of mass <em>m </em>and specific heat <em>c </em>is 
.
We want to calculate the final temperature <em>T, </em>so we have:
Which for our values means (in this case we do not need to convert the mass to Kg since <em>c</em> is given in g also and they cancel out, but we add 
to our temperature in 
to have it in 
as it must be):
Explanation:
Given:
Δx = 50 m
v₀ = 0 m/s
a = 0.2 m/s²
Find: v
The problem does not involve time. Therefore, the required equation is:
v² = v₀² + 2aΔx
Plug in values and solve:
v² = (0 m/s)² + 2 (0.2 m/s²) (50 m)
v = 4.47 m/s
