Answer:
elastic potential energy
Explanation:
b. George Proctor
c. George Westinghouse
d. Thomas DeSaille Tucker
George Westinghouse created a safer and more efficient system for electricity delivery using Alternating Current (AC), which proved superior to Thomas Edison's Direct Current (DC) system.The correct option is C.
The inventor who created a delivery system for electricity that was deemed safer than Thomas Edison's system is George Westinghouse. While Edison's system utilized Direct Current (DC), Westinghouse's approach involved the use of Alternating Current (AC).
This advanced system enabled the delivery of electric power across much farther distances and changed how electricity was used in homes, businesses, and industries.
It led to the expansion of urban areas and allowed factories to operate round-the-clock.
Edison and Westinghouse engaged in a public contention over which system was superior. Despite Edison's efforts to discredit AC power, his method was eventually deemed less efficient, and he had to adapt to the use of AC power due to its growing popularity.
Therefor the correct option is C.
Learn more about Westinghouse's AC Power here:
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Answer:
mass
Explanation:
The mass only tells us the amount of a material. Density, melting points, and solubility are properties of a compound and will be different in this case.
Answer:
The time in which the pendulum does a complete revolution is called the period of the pendulum.
Remember that the period of a pendulum is written as:
T = 2*pi*√(L/g)
where:
L = length of the pendulum
pi = 3.14
g = 9.8 m/s^2
Here we know that L = 14.4m
Then the period of the pendulum will be:
T = 2*3.14*√(14.4m/9.8m/s^2) = 7.61s
So one complete oscillation takes 7.61 seconds.
We know that the pendulum starts moving at 8:00 am
We want to know 12:00 noon, which is four hours after the pendulum starts moving.
So, we want to know how many complete oscillations happen in a timelapse of 4 hours.
Each oscillation takes 7.61 seconds.
The total number of oscillations will be the quotient between the total time (4 hours) and the period.
First we need to write both of these in the same units, we know that 1 hour = 3600 seconds
then:
4 hours = 4*(3600 seconds) = 14,400 s
The total number of oscillations in that time frame is:
N = 14,400s/7.61s = 1,892.25
Rounding to the next whole number, we have:
N = 1,892
The pendulum does 1,892 oscillations between 8:00 am and 12:00 noon.
The question involves the concept of a simple pendulum whose number of swings is largely influenced by its length and the acceleration due to gravity. By determining the period of the pendulum, one can figure out the number of oscillations over a given time period. The pendulum's damping constant is negligible in determining the number of oscillations.
The subject of this question involves understanding the concept of a simple pendulum and how it relates to harmonic motion. It is widely known that the mass of the pendulum does not influence the oscillations but rather the length of the pendulum wire and acceleration due to gravity are paramount.
First, the necessary step toward calculating the number of swings would be to calculate the period of the pendulum's oscillation. This is given by the formula T=2*π*sqrt(L/g), where L is the length of the pendulum (14.4m) and g is the acceleration due to gravity (~9.81m/s²). Substituting these values will give us the period, T, in seconds.
The pendulum starts swinging at 8:00 am and at 12:00 noon, 4 hours or 14400 seconds will have passed. Therefore the number of oscillations will be calculated by dividing the total time by one period of oscillation.
It is crucial to note that the damping in this instance is quite small and would not significantly affect the number of oscillations.
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