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Lisa [10]
3 years ago
12

The Earth-centered model of the Solar System contains____planets.

Physics
2 answers:
Liula [17]3 years ago
8 0

Answer:

5

Explanation:

the geocentric and heliocentric models of the solar system contained the movements of the Sun, the Moon, and the five known planets. Which were Mercury, Venus, Mars, Jupiter, and Saturn.

andreyandreev [35.5K]3 years ago
5 0

8

Explanation:

  • The Solar System is the gravitation  bound system.
  • In this system sun is the head of family  along with many  kids named as planets the largest are the eight planets and  the remainder kids named as dwarf planets and small Solar System bodies.
  • The Solar System formed about  4.6 billion years back from the gravitational collapse of a giant interstellar molecular cloud.
  • The majority of the system's mass is enclosed by  the Sun, with the majority of the remaining mass occupied by Jupiter.
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stepan [7]
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Friction is a force which varies but it is always opposing the direction of motion.

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An applied force is literally the force that is applied to an object.

*WEIGHT FORCE* is also called the force of gravity. It is straight downward.
It is the weight of the object multiplied by the force of gravity. If the TV weighed 100kg, acceleration is always 9.81 m/s^2, so the weight force would be 981 N.

*NORMAL FORCE* is the force which is holding the TV above ground. The ground supplies a force upward against the TV.
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3 0
3 years ago
Which of the following statements is true of space exploration?
elena-s [515]
You don't have a following space exploration
6 0
3 years ago
In an experiment you measure a first-order red line for Hydrogen at an angle difference of ΔΘ = 22.78o. The diffraction grating
azamat

Answer:

a) wavelength = 656.3 nm

b)  the value of Rydberg's constant for this measurement is 1.097 × 10⁷ m⁻¹

Explanation:

Given that;

angle of diffraction Θₓ = 22.78°

incident angle Θ₁ = 0

slit separation d  = 5900 lines per cm = 1/5900 cm = 10⁻²/5900 m = 0.01/5900 m

order of diffraction n = 1

wavelength λ = ?

to find the wavelength, we use the expression

λ = d (sinΘ₁ + sinΘₓ) / n

To find the wavelength λ;

λ = 0.01/5900 × (sin0 + sin22.78° )

λ = 6.5626 × 10⁻⁷ m

λ = 656.3 x 10⁻⁹ m

∴ λ = 656.3 nm

b)

According Balnur's  series spectral lines; n₁ = 3, n₂ = 2 and

λ = R [ 1/n₂² - 1/n₁²]

where  R is Rydberg's constant

from λ = R [ 1/n₂² - 1/n₁²]

R = 1/λ [n₂²n₁² / n₁² - n₂²]

R = 10⁹/ 656.3 [ 9 × 4 / 9 - 4 ]

R = 1.097 × 10⁷ m⁻¹

Therefore the value of Rydberg's constant for this measurement is 1.097 × 10⁷ m⁻¹

4 0
3 years ago
Suppose that the voltage is reduced by 10 percent (to 90 V). By what percentage is the power reduced
skad [1K]

Answer:

percent decrease in power  = 20 % .

Explanation:

Power P = v² / R where v is voltage and R is resistance which is constant .

taking log on both sides

log P = 2 log v - log R

differentiating on both sides

dP/P = 2 dv/v

-dP/P x 100 = 2 x -dv/v x 100

percent decrease in power = 2 x percent decrease in v ( voltage )

percent decrease in power = 2 x 10 = 20 %

3 0
2 years ago
When an object moves in a gravitational field, its potential energy converts into what? A. elastic potential energy B. chemical
Alex Ar [27]

Answer:

B. chemical potential energy

Explanation:

If an object, such as a ball is lifted above the ground it has gravitational potential energy.

8 0
3 years ago
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