SCMH 1011 - EXAM #1 | QUESTIONS AND ANSWERS |
VERIFIED 100% CORRECT
What is the difference between Coloumb's Law vs. Newton's Law? Answer -
Gravity is an attractive force only.
Electricity and magnetism can be an attraction force and/or repel.
What are the 3 temperature scales? What are their freezing/boiling points?
Answer - Celsius, Fahrenheit, and Kelvin.
*KELVIN*: BP: 373K, FP: 273k, Absolute Zero: 0K. - based on pure water.
*CELSIUS*: BP: 100C, FP: 0C, Absolute Zero: -273C.
*FAHRENHEIT*: BP: 212F, FP: 32F, Absolute Zero: -460F. - used brine (salt
water) as a reference material
What is the difference between Copernican vs. Ptolemaic model? Answer - The
Copernican Model contrasted the Ptolemaic Model which placed the Earth at
the center of the Solar System with the sun and all the other planets revolving
around it (a geocentric model).
What is the gravitational acceleration of *Mars*? Answer - 3.7 m/s^2
, What is a calorie? Answer - The amount of chemical energy necessary to raise
the temperature 1g of pure water by 1°C.
What are the 3 heat transfers? Answer - 1. *Conduction*: heat passing in the
form of molecular vibration from one molecule to another in solid materials.
2. *Convection*: transfers heat through density driven movement across a
thermal gradient.
3. *Radiation*: describes heat transfer caused by electromagnetic radiation.
What is the gravitational pull on *Earth*? Answer - 9.8 m/s2
What were early scientists called? Answer - Philosophers
How does the sun move across the sky? Answer - The sun traces a high arc
through the sky in the summer and a lower arc in the winter.
What are stars that help you find your way? Answer - In the Northern
Hemisphere, it is called the *North Star* or *Polaris*.
The Southern Cross gives us south.
How do you find orders of magnitude? Answer - You subtract the powers.
How does the metric system work? What are the typical units? Answer - S.I.
System - it is better designed for science. It is superior to all other systems of
measurement because it is scalable, based on simple relationships, and uses
natural, reliable and accessible points of reference.
- Length: meters
- Weight: grams, metric, tonne
VERIFIED 100% CORRECT
What is the difference between Coloumb's Law vs. Newton's Law? Answer -
Gravity is an attractive force only.
Electricity and magnetism can be an attraction force and/or repel.
What are the 3 temperature scales? What are their freezing/boiling points?
Answer - Celsius, Fahrenheit, and Kelvin.
*KELVIN*: BP: 373K, FP: 273k, Absolute Zero: 0K. - based on pure water.
*CELSIUS*: BP: 100C, FP: 0C, Absolute Zero: -273C.
*FAHRENHEIT*: BP: 212F, FP: 32F, Absolute Zero: -460F. - used brine (salt
water) as a reference material
What is the difference between Copernican vs. Ptolemaic model? Answer - The
Copernican Model contrasted the Ptolemaic Model which placed the Earth at
the center of the Solar System with the sun and all the other planets revolving
around it (a geocentric model).
What is the gravitational acceleration of *Mars*? Answer - 3.7 m/s^2
, What is a calorie? Answer - The amount of chemical energy necessary to raise
the temperature 1g of pure water by 1°C.
What are the 3 heat transfers? Answer - 1. *Conduction*: heat passing in the
form of molecular vibration from one molecule to another in solid materials.
2. *Convection*: transfers heat through density driven movement across a
thermal gradient.
3. *Radiation*: describes heat transfer caused by electromagnetic radiation.
What is the gravitational pull on *Earth*? Answer - 9.8 m/s2
What were early scientists called? Answer - Philosophers
How does the sun move across the sky? Answer - The sun traces a high arc
through the sky in the summer and a lower arc in the winter.
What are stars that help you find your way? Answer - In the Northern
Hemisphere, it is called the *North Star* or *Polaris*.
The Southern Cross gives us south.
How do you find orders of magnitude? Answer - You subtract the powers.
How does the metric system work? What are the typical units? Answer - S.I.
System - it is better designed for science. It is superior to all other systems of
measurement because it is scalable, based on simple relationships, and uses
natural, reliable and accessible points of reference.
- Length: meters
- Weight: grams, metric, tonne
