You might be surprised to find, however, that the first seismometer was invented in China in 132 AD by a Chinese astronomer, mathematician, engineer, and inventor called Zhang Heng. The instrument was said to resemble a wine jar six feet in diameter, with eight dragons positioned face down along the outside of the barrel, marking the primary compass directions. In each dragon’s mouth was a small bronze ball. Beneath the dragons sat eight bronze toads, with their broad mouths gaping to receive the balls. When the instrument sensed an incoming seismic wave, one of the balls would drop and the sound would alert observers to the earthquake, giving a rough indication of the earthquake’s direction of origin. The device is said to have been very accurate and could detect earthquakes from afar, and did not rely on shaking or movement in the location where the instrument was positioned. The first ever earthquake recorded by this seismograph was supposedly somewhere in the east. Days later, a rider from there reported this earthquake. Moreover, it had the most wicked ornaments. They don’t make scientific instruments like they used to! Of course, the insides of the seismometer was filled with a sensing mechanism of some sort, the contents of which have been lost in time. In all likelihood, a simple or inverted pendulum was employed, according to experts.
Answer:
The correct option is option D.
Explanation:
After debate, the congress agrees to appropriate a determined amount of funds to a specific department, so it can makes expenses in the account of the Treasury.
The Office of Management and Budget (OMB) makes sure that the funds are being used effectively, and also prepares the president's budget for the congress, among other critical functions.
If Ken does not account for variables such as age that could also influence one's ability to recall these events, age could be considered a "confounding variable".
A confounding variable is an outside impact that progressions the impact of a dependent and independent variable. This incidental impact is utilized to impact the result of a experimental plan. Basically, a confounding variable is an additional variable went into the condition that was not represented. confounding variables can demolish an examination and deliver futile outcomes. They propose that there are connections when there truly are definitely not.
Answer:
Following are the purpose of the consumer price index (CPI) is given below .
Explanation:
- The Consumer Price Index is to determine the average cost shift across the time payable by the client for the collection of the products and the services.
- Consumer price index is used for the indicator and the inflation as well as the implication, of the financial policy of the Country.
- The main objective of consumer price index is to determining the urban salaried employees as well as the admin staff.
Answer:
1 Declining fertility and increasing longevity lead to rising numbers of older persons as well as a continuously growing share of older persons in the population.
Explanation:
