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stellarik [79]
3 years ago
5

Which scientist was the first to put the sun at the center of the "universe"?

Physics
1 answer:
lesya692 [45]3 years ago
6 0

Answer: C. Nicolas Copernicus

Explanation:

Copernicus's model of the universe (heliocentric theory) was refuting the long life geocentric theory (the Earth as the center of the universe) proposed by <u>Ptolemy</u> and accepted by the Catholic Church.

In this sense, <u>Ptolemy's model of the universe placed the Earth in the center of the known universe</u>, where our planet remains stationary while the other planets, the Moon and the Sun describe complicated orbits around it.

As Ptolemy was a respected astronomer and geographer, this idea was accepted for a long time, until Copernicus arrived with the new model.

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Which of the following activities is most likely to result in nutrient pollution? a. cutting down trees b. pouring motor oil dow
gtnhenbr [62]
Excess fertilizer use results in nutrient pollution by effecting the nutrition values of the plants we eat.

Cutting down trees more likely to result in air pollution by an increase in greenhouse gases.

Pouring oil in drain creates water pollution which is not a nutrient source.
7 0
3 years ago
Read 2 more answers
What does solution mean in science
slega [8]
A solution is a mixture composed of two or more substances which is always homogeneous. One substance dissolves in with the other substance making a solution.

Hope this helps!
8 0
4 years ago
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A) Julie is running to the right at 5 m/s, as shown in the 1st figure. Balls 1 and 2 are thrown toward her at 10 m/s by friends
Svetach [21]

Part 1)

here Julie is running at speed 5 m/s

So here two balls are thrown at speed 10 m/s towards Julie with respect to her friend standing on the ground.

So here this all speed is real speed of all.

Now as per Anita (let say she is one of her friend standing on ground) the speed of two balls will be same as the given speed as she is observing from ground or stationary frame

As per the frame of Julie

speed of ball 1

v_{1j} = v_1 - v_j

v_{1j} = 10 - 5 = 5 m/s towards her in same side

speed of ball 2

v_{2j} = v_2 - v_j

v_{2j} = -10 - 5 = -15 m/s towards her from opposite side

Part b)

Now in this case the speed of two balls is given with respect to Julie

so we can say

for ball 1

v_{1j} = v_1 - v_j

10 = v_1 - 5

so in ground frame speed of ball 1 is

v_1 = 15 m/s

Similarly for ball 2

v_{2j} = v_2 - v_j

-10 = v_2 - 5

So speed in ground frame of ball 2 is

v_2 = - 5 m/s

so its 5 m/s from opposite side

6 0
3 years ago
Workin
max2010maxim [7]

Answer:

Soru okunmuyor keşke fotoğrafını çekip atsaydın öyle atarsan sorunu çözerim

İYİ DERSLER

8 0
3 years ago
Ángel is riding his bike 15m/h south a) speed b) velocity c) acceleration​
mixer [17]

Answer:

Velocity

Explanation:

Speed does not have a direction, Acceleration means that it is speeding up and not at a constant 15m/h, so the answer is B.

7 0
2 years ago
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