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cricket20 [7]
3 years ago
8

In the history of astronomy, which of the following is true? . A] Tycho Brahe built one of the first observatories. B] Ptolemy w

as criticized for his work on the heliocentric model. C] Nicolaus Copernicus argued that the sun was the center of the universe. .D] Johannes Kepler argued that Earth was the center of the universe. . .
Physics
2 answers:
matrenka [14]3 years ago
6 0

Answer: C] Nicolas Copernicus argued that the sun was the center of the universe.

Explanation:  

The first observatory was built for Tycho Brahe, a Danish astronomer on the island of Hven by King Frederick II of Denmark. Ptolemy supported the geocentric model which considered Earth to be at the center of the universe. Johannes Kepler supported the heliocentric model.

Thus, the only true statement from the given options is that Nicolas Copernicus argued that the Sun was the center of the universe. He proposed the Heliocentric model. He believed the Sun to be the center and every other object - planets , stars revolved about the Sun.

Gelneren [198K]3 years ago
4 0
D. <span>Johannes Kepler argued that Earth was the center of the universe.

</span>
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Rocks A and B are located at the same height on top of a hill. The mass of rock A is twice the mass of rock B. How does the pote
Ronch [10]

Potential energy is defined by formula

U = mgh

here

m = mass

g = acceleration due to gravity

h = height

Now here two different stones are located at same height

while mass of stone A is twice that of stone B

so here we can say potential energy of A is

U_a = (2m)gh

Similarly potential energy of B is

U_b = mgh

now if we take the ratio of two energy

\frac{U_a}{U_b} = 2

so we can say potential energy of stone A is two times the potential energy of B

7 0
3 years ago
A 300 g glass thermometer initially at 23 ◦C is put into 236 cm3 of hot water at 87 ◦C. Find the final temperature of the thermo
DIA [1.3K]

Answer:

74^{\circ} C

Explanation:

We are given that

Mass of glass,m=300 g

T_1=23^{\circ}

Volume,V=236cm^3

Mass of water=density\times volume=1\times 236=236 g

Density of water=1g/cm^3

Temperature of hot water,T=87^{\circ}

Specific heat of glass,C_g=0.2cal/g^{\circ}C

Specific heat of water,C_w=1 cal/g^{\circ}C

Q_{glass}=m_gC_g(T_f-T_1)=300\times 0.2(T_f-23)

Q_{water}=m_wC_w(T_f-T)=236\times 1(T_f-87)

Q_{glass}+Q_{water}=0

300\times 0.2(T_f-23)+236\times 1(T_f-87)

60T_f-1380+236T_f-20532=0

296T_f=20532+1380=21912

T_f=\frac{21912}{296}=74^{\circ} C

5 0
2 years ago
Why is it important for scientist to do research?
sweet-ann [11.9K]

Answer:

Because if they dont research first they will be unprepared

Explanation:

3 0
2 years ago
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What is the total potential difference provided by the four cells in the circuit each of 1.5volts?
aivan3 [116]

Answer:

Answers 2.( a) . (i)Total potential difference provided by the four cell = 4x 1.5 Volts = 6.0 Volts (ii)The component of X is a variable resistor .

Explanation:

hope it helps

4 0
2 years ago
What is the correct answer?
inysia [295]
The answer to your question is metaphase
3 0
3 years ago
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