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Ch.8 - The Quantum-Mechanical Model of the Atom
Tro - Chemistry: A Molecular Approach 6th Edition
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 6th EditionCh.8 - The Quantum-Mechanical Model of the AtomProblema 35
Capitolo 8, Problema 35

The distance from the sun to Earth is 1.496×108 km. How long does it take light to travel from the sun to Earth?

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First, we need to know the speed of light, which is approximately 3.00 * 10^8 meters per second (m/s).
Next, convert the distance from the sun to Earth from kilometers to meters. Remember that 1 kilometer is equal to 1000 meters.
Then, use the formula for time, which is distance divided by speed. In this case, the distance is the distance from the sun to Earth (in meters) and the speed is the speed of light.
Substitute the values into the formula and calculate the time.
Finally, convert the time from seconds to minutes if necessary. Remember that 1 minute is equal to 60 seconds.

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Speed of Light

The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s). This constant is crucial for calculating how long it takes light to travel a given distance, such as from the sun to Earth. Understanding this speed allows us to relate distance and time in the context of light travel.
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Distance and Time Relationship

The relationship between distance, speed, and time is described by the formula: time = distance/speed. In this scenario, the distance from the sun to Earth is known, and by using the speed of light, we can determine the time it takes for light to cover that distance. This fundamental concept is essential for solving problems involving motion.
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Units of Measurement

In physics and chemistry, it is important to use consistent units of measurement. In this case, the distance is given in kilometers, and the speed of light is in kilometers per second. Ensuring that both measurements are in compatible units is necessary for accurate calculations, as it allows for straightforward application of the distance and time relationship.
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Units of Radiation Measurement
Pratica correlata
Domanda del libro di testo

List these types of electromagnetic radiation in order of (ii) increasing energy per photon.

a. visible light

b. radio waves

c. X-ray

d. ultraviolet radiation

Domanda del libro di testo

List these types of electromagnetic radiation in order of (i) increasing frequency and (ii) decreasing energy per photon.

a. gamma rays

b. ultraviolet radiation

c. infrared radiation

d. microwaves

Domanda del libro di testo

The nearest star to our sun is Proxima Centauri, at a distance of 4.3 light-years from the sun. A light-year is the distance that light travels in one year (365 days). How far away, in km, is Proxima Centauri from the sun?

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