Answer:
The value of the acceleration of gravity of the Unknown Planet = 1.14
Explanation:
length of the pendulum (L)= 1.15 m
Time period (T)= 6.29 seconds
We know that time period of a simple pendulum is given by
⇒ T = 2 ×
put the values in the above formula we get
⇒ T = 2 ×
⇒ 6.29 = 2 ×
By solving the above equation we get
⇒ g = 1.14
This is the value of the acceleration of gravity of the Unknown Planet.
Answer:
f = 96.56 Hz
Explanation:
A soda bottle can be simulated by a system of a tube with one end open and the other closed. In this case at the closed end we have a node and at the open end a maximum, so the wavelength is
λ = 4L / n
where n = 1, 3, 5, ...
for our case the speed of sound is
v = λ f
we substitute
f / v = 4L / n
calculate
290 / (340 4) = L / n
0.213 = L / n
In the exercise the value of n is not indicated, but we can assume that it is the fundamental answer, therefore n = 1
L = 0.213 m
now we can calculate the frequency of the following resonance n = 3
f = 4L v / n
f = 4 0.213 340/3
f = 96.56 Hz
The answer is d) batteries
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Answer:
90m/s
Explanation:
Given parameters:
Acceleration = 10m/s²
Time of fall = 9s
Unknown:
Final velocity = ?
Solution:
We can assume that the cart falls from rest.
Initial velocity = 0m/s
Using
v = u + gt
v is the final velocity
u is the initial velocity
g is the acceleration due to gravity
t is the time
v = 0 + 10 x 9 = 90m/s
<h2>
Answer: Positive acceleration</h2>
Acceleration is the variation of velocity over time .
Now, it is said that a body has a <u>positive acceleration</u>, when the velocity of the body increases, that is, when the final velocity is greater than the initial velocity.
It is then said that it is an accelerated movement.