basic physics

timer Asked: Jan 20th, 2019
account_balance_wallet $20

Question Description

It has 20 question and due in 8 hours simple answers it should not be tough ((see the attachment)) and it will be around physics.

1- describe what systems of measurement are currently in use and what is the difference between them? 2-What information do we need to calculate the volume of a ... a) Cube; and b) Cylinder. 3- What units we need to determine in order to calculate speed (velocity)? 4- Provide examples of consumer products with volume of 500 mL and 2 liters. 5- If you buy a 500 mLbottle of soda and you finish it in regular class period of 50 minutes, what is the average flow rate of your soda drinking? Can you calculate it in liters? 6- Briefly explain what is concentration and what are the units of measurement. What units are used for very low concentrations? 7- What is the difference between gravimetric and volumetric concentrations? 8- If you have 10 pounds of apples (all uniform) and you measure that each apple weighs half pound, dividing the total weight of all apples by the weight of a single apple, what is the meaning of the number that you get? 9- List the content of air and roughly the corresponding proportions. 10- Explain your understanding of temperature and what is the effect of evaporation on the temperature, why do we like pool parties in hot summer days? 11- How wind speed affects the air pressure (Hint: Bernoulli's principle)? 12- What do we mean by % relative humidity when reporting the weather conditions? Can we have 100% humidity and what does that mean? 13- List physical hazardous agents. 14- What is filtration? Explain briefly how it works. Give examples. 15- What is an ion? Give examples. 16- What is molecular polarization? Give examples. 17- What is sorption? Describe difference between absorption and adsorption. 18- What is radiation? Give examples. 19- Give definition for calibration. 20- Light, microwaves, and X-rays are different parts of what? What form of energy they represent?

Tutor Answer

School: UT Austin

Attached you will find the outline and answers for your assignment. Please let me know if you need modifications or clarifications.

1. There are three main systems of measurement. The difference between them are the units that
are defined as standard for the physical magnitudes of length, mass, volume, temperature and
time. The SI units (International Systems of Units) uses meter for length, kilograms for mass,
kelvin for temperature, cubic meter for volume, and seconds for time. In the case of the metric
system, it shares some units with the SI units but differs in temperature (Celsius degree),
volume (liter), and mass (grams). There is another unit system that is commonly used in the
United States and other countries called British system. Some units that differs are in length
(inches) and mass (pounds).
2. A. To calculate the volume of a cube, we need to measure the length of one side (since a cube
have the same length in every side of the six faces). B. To calculate the volume of a cylinder,
we need to measure the height and the diameter of the base (the base of a cylinder is a circle).
3. Speed (velocity) is a derived unit that relates the units of length and time. To calculate speed,
we need to measure the distance covered (length) and time when that distance is covered.

Beverages like soft drinks, water and juices are in presentations of 500mL and 2 liters. Some
detergents like laundry and liquid detergent are in presentation of 500mL. Also, some creams
and liquid anti-acids to treat indigestion like Gaviscon are also in the presentation of 500mL.

5. The flow rare is defined as the volume of liquid which passes through a section of interest per
unit of time; in this case, through my throat. The average flow rate is the division between the
volume that I drank and the time that I consumed in drinking: 1...

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