Conceptual Physical Science Explorations

2nd Edition

ISBN: 9780321567918

Author: Paul G. Hewitt, Leslie A. Hewitt, John A Suchocki

Publisher: Addison Wesley

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Textbook Question

Chapter 7, Problem 20RQ

What makes the Earth round?

Expert Solution & Answer

To determine

The reason for the round shape of the Earth.

Answer to Problem 20RQ

The shape of the Earth is round due to the force of gravity.

Explanation of Solution

The mass of every particle exerts the gravitational force and the nature of this force is attractive. Every particle in the space attracts the other particles.

The mass of every part of the Earth attracts the objects towards the center of the Earth. The round shape of the Earth is due to the gravitational pull of every part of the Earth on the other part. The force of gravity balances the effect of one part by the effect of the other part, so the Earth takes the rounded shape to balance the gravity force of every part completely.

Conclusion:

Therefore, the shape of the Earth is round due to the force of gravity.

Chapter 7, Problem 19RQ

Chapter 7, Problem 1TC

Chapter 7 Solutions

Conceptual Physical Science Explorations

Ch. 7 - What connection did Newton make between a falling...Ch. 7 - What does it mean to say something moving in a...Ch. 7 - In what sense does the Moon "fall?"Ch. 7 - State Newton's law of universal gravitation in...Ch. 7 - How does the force of gravity between two bodies...Ch. 7 - How does the thickness of paint sprayed on a...Ch. 7 - Prob. 7RQ Ch. 7 - What is the magnitude of gravitational force...Ch. 7 - What is the magnitude of the gravitational force...Ch. 7 - What do we call the gravitational force between...

Ch. 7 - When G was first measured, the experiment was...Ch. 7 - With no gravity, a horizontally moving projectile...Ch. 7 - A ball is batted upward at an angle. What happens...Ch. 7 - With no air drag, what happens to the horizontal...Ch. 7 - How can a projectile "fall around the Earth?"Ch. 7 - Are the planets of the solar system simply...Ch. 7 - Why does the speed of a satellite undergo change...Ch. 7 - At what part of an elliptical orbit does a...Ch. 7 - What is the minimum speed for orbiting the Earth...Ch. 7 - What makes the Earth round?Ch. 7 - The planet and its much less massive moon...Ch. 7 - Three boys on three towers of the same height toss...Ch. 7 - Comment on whether or not this label on a consumer...Ch. 7 - Gravitational force acts on all bodies in...Ch. 7 - What would be the path of the moon if somehow all...Ch. 7 - Is the force of gravity stronger on a piece of...Ch. 7 - Is the force of gravity stronger on a piece of...Ch. 7 - What is the magnitude and direction of the...Ch. 7 - The Earth and the Moon are attracted to each other...Ch. 7 - What do you say to a friend who says that if...Ch. 7 - A friend says that astronauts in orbit are...Ch. 7 - Is the horizontal component of the velocity for a...Ch. 7 - A heavy crate accidentally falls from a highflying...Ch. 7 - At what point in its trajectory does a batted...Ch. 7 - A park ranger shoots a monkey hanging from a...Ch. 7 - Since Earth is gravitationally attracted to the...Ch. 7 - Prob. 15TE Ch. 7 - Prob. 16TE Ch. 7 - If a cannonball is fired from a tall mountain,...Ch. 7 - When an Earth satellite is placed into a higher...Ch. 7 - If a space vehicle circled Earth at a distance...Ch. 7 - Some people dismiss the validity of scientific...Ch. 7 - If you stood atop a ladder that was so tall you...Ch. 7 - Find the change in the force of gravity between...Ch. 7 - Find the change in the force of gravity between...Ch. 7 - Find the change in the force of gravity between...Ch. 7 - Find the change in the force of gravity between...Ch. 7 - Find the change in the force of gravity between...Ch. 7 - Consider a bright point of light located 1 m from...Ch. 7 - Calculate the force of gravity between the Earth...Ch. 7 - A 3-kg newborn baby at the Earths surface is...Ch. 7 - Students in a lab measure the speed of a steel...Ch. 7 - The force of gravity between two planets depends...Ch. 7 - When the distance between two stars is reduced by...Ch. 7 - If the Sun were twice as massive, its pull on Mars...Ch. 7 - When an astronaut in orbit is weightless, he or...Ch. 7 - When no air resistance acts on a fast-moving...Ch. 7 - Prob. 6RAT Ch. 7 - In circular orbit, the gravitational force on a...Ch. 7 - Prob. 8RAT Ch. 7 - A satellite in elliptical orbit Earth travels...Ch. 7 - A satellite in Earth orbit is above Earth's (a)...

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