Answer: Frequency is 0.143 Hz; Period is 7 seconds
Explanation:
Number of vibrations = 8.6
Time required = 60 seconds
Period (T) = ?
Frequency of the vibrations (F) = ?
A) Recall that frequency is the number of vibrations that the Sears tower completes in one second.
i.e Frequency = (Number of vibrations / time taken)
F = 8.6/60 = 0.143Hz
B) Period, T is inversely proportional to frequency. i.e Period = 1/Frequency
T = 1/0.143Hz
T = 7 seconds
Thus, the frequency and period of the vibrations of the Sears Tower are 0.143 Hz
and 7 seconds respectively.
Answer:
B 1500N
Explanation:
The acceleration of the car - at least the average one, but that will do, is 
We know the acceleration, we know the force, let's drop them in Newton second law.

<u>Answer</u> :
atom
<u>E</u><u>xplaination</u> :
You cannot see the fundamental particles that makes up matter.
Yet, ll matter os composed of such particle called atoms.
atoms - the smallest particle of an element that retains its identity in a chemical reaction.
<em>pls mark as brainliest...</em>
Can you put this in english plz i dont want to be rude but i cant read this at all
Answer:
A) C = 4.425 10⁻¹³ F, B) Q = 6.31 10⁻¹¹ C, C) E = 8.9 10⁴ N / C,
D) u_{E} = 3.19 10⁻⁹ J
Explanation:
Part A. Capacitance is
C = ε₀ A / d
in this case distance is d = 0.800 cm = 0.800 10⁻² m and the area of the plates is x = 0.200 cm= 0.2 10⁻² m, all the quantities must be in the SI system for the result to be in Farads
A = x²
A = (0.2 10⁻²)²
A = 4 10⁻⁶ m
let's calculate
C = 8.85 10⁻¹² 4 10⁻⁶ / 0.8 10⁻²
C = 44.25 10⁻¹⁴ F
C = 4.425 10⁻¹³ F
Part B. The charge on each plate is
Q = C ΔV
Q = 4.425 10⁻¹³ 120
Q = 6.31 10⁻¹¹ C
Part C. the electric field of a plate is
E = σ / 2ε₀
where the charge density is
σ = Q / A
we substitute
E =
let's calculate
E =
E = 8.9 10⁴ N / C
Part D. stored energy
= ½ C V²
u_{E} = ½ 4.425 10⁻¹³ 120²
u_{E} = 3.19 10⁻⁹ J