Physics 1.1 - The Realm of Physics | Attempts: 141 - Quiz, Trivia , Flashcards & Questions

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Quizzes Created: 3 | Total Attempts: 2,515

| Attempts: 141

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1/5 Questions

Earth's mass is about kg. Please estimate the number of atoms in the entire Earth.

About This Quiz

This quiz will test your knowledge and understanding of Physics topic 1.1.

Physics 1.1 - The Realm Of Physics - Quiz

2.

Earth's radius is about 6378km. Please estimate the number of atoms in Earth.
Correct Answer

A.

Explanation

Earth's radius is about m. Each atom is about m.

It takes = atoms to be as long as Earth's radius. Since Earth is three-dimensional, it should contain = atoms.
If you forgot to convert the unit from kilometers to meters, you will end up with the wrong answer B.

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3.

Please estimate how many times on average a human heart beats in a human's life time, assuming that the average person lives for 75 years and that the heart beats between 60 and 80 times per minute.
Correct Answer

A.

Explanation

The number of heartbeats in a human's lifetime is heartbeats/min min/hr hr/day days/year years heartbeats.

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4.

Please calculate the thickness of a piece of paper in millimeters, assuming the thinkness of a 500-page book to be 5 cm.
Correct Answer

A.

Explanation

The thickness of a piece of paper is .
Pay attention to the units. It is 0.0001 in meters. But answer E is wrong.

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5.

What is the ratio of the age of the universe to the time it takes for the traffic light to change from red to green, assuming that the age of universe is 14 billion years and the waiting time for the light change is 1 minute?
Correct Answer

A.

Explanation

14 billion years years days/year hr/day sec/min seconds.
The ratio is

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Dec 10, 2012

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Marcbrunssen

Physics 1.1 - The Realm Of Physics

Earth's mass is about kg. Please estimate the number of atoms in the entire Earth.

Quiz Preview

Earth's radius is about 6378km. Please estimate the number of atoms in Earth.

Please estimate how many times on average a human heart beats in a human's life time, assuming that the average person lives for 75 years and that the heart beats between 60 and 80 times per minute.

Please calculate the thickness of a piece of paper in millimeters, assuming the thinkness of a 500-page book to be 5 cm.

What is the ratio of the age of the universe to the time it takes for the traffic light to change from red to green, assuming that the age of universe is 14 billion years and the waiting time for the light change is 1 minute?