b. Stellar parallax was first observed by ancient Greek astronomers.
c. The amount of parallax we see depends on how fast a star is moving relative to us.
d. The closer a star is to us, the more parallax it exhibits.
e. It takes at least 10 years of observation to measure a star's parallax.
Answer:
c. The amount of parallax we see depends on how fast a star is moving relative to us.
Explanation:
The stellar parallax is obtained by a mathematical calculation, is a geometrical measure among the Earth and another star. For example, by now, it is known the distance from the Earth to the sun, so, is like this star can be observed by two eyes. The Earth and the Sun. If we joined the two lines from the Earth and the Sun too the star, it will form a triangle. With some calculation and the angle formed, it can be determined the distance to the star.
Hope it was useful.
The true statement is: the closer a star is to us, the more parallax it exhibits. Stellar parallax, the apparent shift of a star's position due to Earth's orbit, is used to measure star distances. The other options provided are not entirely accurate.
The correct statement about stellar parallax among the options given is d. The closer a star is to us, the more parallax it exhibits. Stellar parallax is the apparent shift of the position of a nearby star against the background of distant stars due to the orbit of Earth around the Sun. This method is used to measure the distances of nearby stars. The amount of parallax observed for a star decreases as the distance to the star increases. Thus, a closer star will have a larger apparent shift, or parallax, than a star farther away.
Options a, b, c, and e are not entirely correct:
a. Not all stars exhibit a noticeable parallax because some are too distant.
b. The concept of parallax was certainly known to ancient Greek astronomers, but precise measurements were not possible until modern times with more sophisticated technology.
c. The speed of a star relative to us has no effect on its parallax - it is entirely due to Earth's motion.
e. Parallax can be measured with less than a year of observation - what is needed is to observe the star from positions six months apart in Earth's orbit.
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b. thousands of deaths due to small pox
c. the production of new types of agriculture
d. the African slave trade brought new laborers
(its not a because i tried it)
-more irregular
-larger
-smaller
The correct answer is - smaller.
The size of the crystals of the igneous rocks is directly affected by the speed of the cooling of the magma.
If the magma cools off very quickly, than the size of the crystals of the igneous rocks will be very small, while if the magma cools off very slowly, than the size of the crystals of the igneous rocks will be bigger.
This happens because of the time of influence of other factors in the formation of the rock itself. The ones that are on the surface or close to it, cool off very quickly, so there's no time for any significant influences on the rock. The ones that are deeper into the ground, cool off much slower because it is hotter, and also in that period the temperature and the high pressure manage to heavily influence the rock, thus making it having bigger crystals.
b. Sales and low price
c. Goods and income
d. Services and low prices
Consumers create demand for goods and services . Correct answer: A
Consumer demand is defined as how much of something people want.
However, the factor that most influences changes in consumer demand is the price of the good or service.
Consumers create demand for Goods and services. Thus, option A is the correct option.
In order to fulfil their needs for things like food, healthcare, clothes, entertainment, housing, etc., people demand commodities and services from an economy. The demand for a product at a particular price represents the level of happiness a consumer anticipates to have after using the product.
Utility refers to this amount of satisfaction, which varies from user to customer. The usability of an item or service to fulfil a need or want and the consumer's financial capacity are the two main determinants of demand. In essence, true demand occurs when a person's willingness and capacity to pay to support their willingness to gratify a wish.
Learn more about consumers here:
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Answer:
Cool and dry
Explanation: trust me its not hot and dry as its 0 - 25 celcius or around 30 - 75 farenhiet, and it doesnt rain much so its definitely dry