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4 years ago

How did the heliocentric theory differ from the geocentric theory

Physics

1 answer:

cricket20 [7]4 years ago

6 0

Answer:

Geocentric theory: Earth is the center of the universe.

Heliocentric theory: The Sun is the center of the universe.

Explanation:

The geocentric theory was formulated by Aristotle and says that the earth is the center of the universe and the other planets and stars including the sun revolve around it.

On the other hand, Copernicus with his heliocentric theory states that the sun is the center of the universe and the planets revolve around it.

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PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!

Montano1993 [528]

They literally gave you the answer but okay.

Correct answer should be: B. 490 Meters

1/2 x 9.8 x 10^2

Plug them in a calculator and you get 490 meters.

G = Gravity which is 9.8 m/s^2

T= Time

5 0

4 years ago

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A projectile is fired from ground level with an initial speed of 650 m/sec and an angle of elevation of 30 degrees. Use that the

svlad2 [7]

Answer:

(a) The range of the projectile is 37,336.3 m

(b) The maximum height of the projectile is 5,389.03 m

Explanation:

Given;

initial velocity of the projectile, u = 650 m/s

angle of projection, θ = 30⁰

(a) The range of the projectile is calculated as;

$R = \frac{u^2sin 2\theta}{g} \\\\R = \frac{(650^2)Sin (2\times 30^0)}{9.8} \\\\R = 37,336.3 \ m$

(b) The maximum height of the projectile is calculated as;

$H = \frac{u^2sin^2\theta}{2g} \\\\H = \frac{(650^2)(Sin \ 30^0)^2}{2\times 9.8} \\\\H = \frac{(650^2)(0.5)^2}{19.6} \\\\H = 5,389.03 \ m$

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3 years ago

Uranium-238 has a half-life of 4.5 billion years. Given that scientists estimate Earth's age to be 4.6 billion years, what is th

anyanavicka [17]

Answer:

103.3 %

Explanation:

For a radioactive isotope, the number of radioactive nuclei left (parent nuclei) after a time t, N(t), is

$N(t)=N_0 (\frac{1}{2})^{\frac{t}{\tau}}$

where

N0 is the initial number of radioactive nuclei

t is the time

$\tau$ is the half-life of the isotope

Here we have

$t=4.5 \cdot 10^9 y\\\tau = 4.6\cdot 10^9 y$

So we find

$\frac{N(t)}{N_0}=(\frac{1}{2})^{\frac{4.5\cdot 10^9}{4.6\cdot 10^9}}=0.508$

Which means that the fraction of parent nuclei left after this time is 0.508 (50.8% of the initial value). So the fraction of daugther nuclei at this time is

$\frac{N_d}{N_0}=1-0.508=0.492$

So the percentage of parent to daughter isotopes is

$\frac{N(t)}{N(d)}=\frac{0.508}{0.492}=1.033$

Which corresponds to 103.3 %.

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4 years ago

If I stand on a scale and it shows 200 lbs (890 Newtons), what is the Newton's 3rd Law Pair force and what value (number) does i

tensa zangetsu [6.8K]

Newton's 3rd Law of Motion is the Law of Interaction which states that in every action there is always an equal and opposite reaction. In this problem, the pair of forces is the weight (W) which is 200 lbs or 890 Newtons and the interaction is the force that the spring of the weighing scale exerts which is numerically the same to the weight but with opposite sign.

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3 years ago

PLEASE ANSWER FIRST GETS BRAINLIEST

Ghella [55]

Answer:

I think it's d. The coil gains an electical current

Explanation:

8 0

3 years ago

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