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algol13
3 years ago
6

The sun’s___and the planet’s___keeps planets moving is___orbits.

Physics
1 answer:
Sauron [17]3 years ago
8 0

The sun’s gravitational attraction and the planet’s inertia keeps planets moving is circular orbits.

Explanation:

The planets in the Solar System move around the Sun in a circular orbit. This motion can be explained as a combination of two effects:

1) The gravitational attraction of the Sun. The Sun exerts a force of gravitational attraction on every planet. This force is directed towards the Sun, and its magnitude is

F=G\frac{Mm}{r^2}

where

G is the gravitational constant

M is the mass of the Sun

m is the mass of the planet

r is the distance between the Sun and the planet

This force acts as centripetal force, continuously "pulling" the planet towards the centre of its circular orbit.

2) The inertia of the planet. In fact, according to Newton's first law, an object in motion at constant velocity will continue moving at its velocity, unless acted upon an external unbalanced force. Therefore, the planet tends to continue its motion in a straight line (tangential to the circular orbit), however it turns in a circle due to the presence of the gravitational attraction of the Sun.

Learn more about gravity:

brainly.com/question/1724648

brainly.com/question/12785992

#LearnwithBrainly

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Quel est le type de rayonnement produit par la radioactivité
Dmitriy789 [7]

Il existe troi types de rayons produits lors de la désintégration des éléments radioactifs:

-- "particules alpha" . . . noyaux d'hélium, composés chacun de 2 protons et 2 neutrons

-- "rayons bêta" ou "particules bêta" . . . flux d'électrons

-- "rayons gamma" . . . rayonnement électromagnétique avec les longueurs d'onde les plus courtes connues et l'énergie la plus élevée

8 0
3 years ago
An airplane travels 2800 km at a speed of 700 km/h, decreases its speed to 500 km/h for the next 1500 km and travels the last 10
Dafna11 [192]

Answer:

he average speed for the airplane is 558 km/hr

Explanati

6 0
2 years ago
The reservoir stores 6 500 000 m3 of water. The density of the water is 998 kg/m3. Calculate the mass of water in the reservoir.
Mekhanik [1.2K]

Answer:

Mass = 64,870,000,000 kilograms

Explanation:

Given the following data;

Density = 998 kg/m³

Volume = 6,500,000 m³

To find the mass of water in the reservoir;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

Density = mass/volume

Making mass the subject of formula, we have;

Mass = density * volume

Mass = 998 * 6,500,000

Mass = 64,870,000,000 kilograms

8 0
3 years ago
A person uses eyeglasses with a power of -5.5 D. The lenses are 1.8 cm from the person's eye. What is the furthest this person c
bija089 [108]

Answer:

The correct answer is option B.

Explanation:

power(P)=\frac{1}{f}

f = focal length

P = -5.5 D (negative power means that lens is concave)

f=\frac{1}{P}=\frac{1}{-5.5 D}= -0.1818 m

1 m = 100 cm

f = -0.1818 m = -0.1818 × 100 cm= -18.18 cm

\frac{1}{f}=\frac{1}{u}+\frac{1}{v}

u=\infty

\frac{1}{-18.18 cm}=\frac{1}{\infty }+\frac{1}{v}

v = -18.18 cm

v = 1.8 cm - far point

far point = 1.8 cm - v =1.8 cm - (-18.18 cm) =  19.98 cm

But closest answer from the given options is option B.Hence, 20 cm is the correct answer.

6 0
3 years ago
The more cores in a golf ball, the more ________ that will be created.
Free_Kalibri [48]
<span>The answer is spin<span>.

The more cores in a golf ball, the more </span>spin<span> that will be created.

Depending on how many layers or cores there are in a golf ball, the number of spins that it will generate when a shot is made increases accordingly.</span></span>
8 0
3 years ago
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