|
|
EasyLunchboxes 3-compartment Bento Lunch Box Containers (Set of 4) BPA-Free. Easy-Open Lids (Not Leakproof) $13.95 Save time, money, paper, and plastic when you use EasyLunchboxes. No more wasteful baggies or mismatched plastic containers. Now you can pack lunches fast for work or school. Even make homemade “Lunchables®!” Created by a mom of three, these bento-style, 3-compartment containers are designed to be carried upright in the EasyLunchboxes cooler bag (choose from 7 vibrant colors). Container lids stay… |
|
|
Nordic Ware 65004 11-Inch Microwave Plate Cover $5.00 Prevents spatters in the microwave and keeps food warm for serving. See-thru hard plastic so you can view food as it cooks. Stackable, and fits dinner plates up to 11-in. BPA-free…. |
|
|
Rubbermaid Premier Food Storage Set, Tritan The Rubbermaid FG7J11TRCHILI 12 Piece Premier Food Storage Set contains (2) 1.25 cup, (2) 2 cup, (1) 3 cup, and (1) 5 cup containers with lids. Rubbermaid Premier Containers are made with Tritan⢠plastic that resists stains and odors. Plus, Premiers have Flex & Seal⢠lids that are easy to seal and remove. Part of the Easy Find Lids system, Premier lids snap to bases and other lids so you… |
|
|
SILICONE OVEN RACK GUARD (SET OF 4) $9.50 Our silicone oven rack guard protects your hands from getting burned by hot oven racks. Just slip the Oven Guard on the front of the oven shelf and snap close. It’s that simple. With stands temperatures up to 440 degrees F; please still use oven mitts as oven guard will be warm! Wash in warm soapy water and reuse. Size: 14″. Set of 4… |
|
|
Rubbermaid 7J12 Premier 20-Piece Food-Storage Container Set Rubbermaid Premier 20-piece Set #7J12 includes: (3) 1.25 cup (3) 2.0 cup (2) 3.0 cup and (2) 5.0 cup. Featuring Easy Seal: Flex & Seal lids that lock in freshness and are easy to seal & remove. Rubbermaid Premier food storage containers are easy to clean featuring durable shatterproof plastic that resists stains & odors for lifetime of clarity. Rubbermaid Premier is exceptionally easy to sto… |
|
|
Rubbermaid FG5157RDBLUE Flex & Seal Divided Rectangle Food Storage Container $8.03 The lids are what make the Flex & Seal line of Rubbermaid food storage containers stand out. Clear, so that you can see what’s inside at a downward glance, the lid is ringed with a flexible blue rubber seal that conforms tightly to the plastic body and peels off easily when you’re ready to open it. Leaks and air-spoilage? Gone. The thick, durable food savers may be used to freeze liquids and solid… |
Microwave Divided!
Tupperware Divided Dish-Make TV Dinners
Microwave Divided Questions
help calculating wavelength and frequency?
I need help calculating the following two problems on wavelength and frequency. I know how to calculate the wavelength and frequency I just don’t know how to convert it into the units they are asking. meaning for example in the first question I would divide the speed of light by 8.67 × 10^9 Hz but then how would I calculate this answer in millimeters?Just show me how to solve the two problems thanks.
1.Calculate the wavelength in millimeter of microwave radiation whose frequency is 8.67 × 10^9 Hz. Express answer in scientific notation.
2.Calculate the frequency of radar radiation (Hz) whose wavelength is 32.2 cm. Express answer in scientific notation.
E = ħc / λ = ħf —–> c / λ = f
E = energy
ħ = plancks constant = 6.626×10^-34 J s
c = speed of light = 3.00×10^8 m/s
λ = wavelength
f = frequency
and also note that 1 Hz = 1 / s…recipricol second…
*** 1 ***
c / λ = f
λ = c / f = (3.00×10^8 m/s) / (8.67×10^9 / s) = 0.0346 m
0.0346 m x (1000 mm / 1 m) = 34.6 mm
*** 2 ***
c / λ = f
λ = 32.2 cm x (1 m / 100 cm) = 0.322 m
f = c / λ = (3.00×10^8 m/s) / (0.322 m) = 9.32×10^8 /s = 9.32×10^8 Hz
****** comments *******
i left plancks constant and energy etc for your future reference.. it really wasn’t needed for this problem so you could skip those if you want.
I know your question was about the unit conversions. not the formula of c / λ = f.. but I wanted you to see how the calculations should look.
as to unit conversions… the process that I recommend is “factor label method”.. aka “unit factor method”… aka “dimensional analysis”… it is extremely important that you understand this and practice it.
here’s a link to a question where I explained that process…it should take you about 10 minutes to read it. Please do so. It will make unit conversions easy…
http://answers.yahoo.com/question/index;_ylt=AsRjbksji5QYBhY_tVjevj_sy6IX;_ylv=3?qid=20081203034836AA0NM3F
Microwave Oven Radiation Dangers & Safety
The microwave is possibly one of the best inventions for busy people. Allowing us to cook food in a fraction of the time it would take in an oven, the microwave has made cooking simple for millions of people worldwide. However, the amount of radiation we are exposed to in our day to day lives has become a worry for many people.
How Microwaves Work
Microwaves heat food by sending out waves that cause the water molecules in a food item to vibrate rapidly. This creates an energy that presents itself as heat to cook the food. Ideally, the waves are contained within the microwave because the door is closed as it is turned on, releasing waves and cooking the food.
Problems arise when living skin tissue is exposed to these waves. This type of radiation is only present while the microwave is running and if it has a leak. This leak is undetectable to the human eye, as microwaves are colorless and odourless.
Microwave Radiation Health Concerns
The radiation from your microwave can cause potentially serious health problems.
These problems include:
Skin Cancer, Cataracts, Dizziness and Headaches, Blood Disorders, Temporary Sterility in Men
Experts fear that children are more susceptible to possible damage caused by microwave resonance. This is because a child’s cells are still dividing rapidly as they grow and any interference with that natural biological process could cause cellular mutation and possibly long term damage.
Unfortunately, the studies that have been done to determine the “safe” levels of exposures to microwave radiation tested subjects exposed to a high level of radiation for a relatively short period of time. The effects of low-level exposure over several decades is unknown.
The danger is compounded when people are bombarded with radiation not only from their microwave, but from cell phones, wireless networks, radio towers and more. It is hard to pinpoint exactly which technology could be causing the level of environmental radiation to rise to an unsafe level. Without actually knowing what that unsafe level is due to a lack of solid research, one can only try to limit their exposure.
How to Avoid Dangerous Microwave Exposure?
Research conducted by microwave repair servicemen indicates that over 50% of microwaves which are at least two years old leak around 10% higher radiation levels than what is recommended by the FDA. The good news is that by doing a slight readjustment, the problem can be solved. If you do have a microwave that more than two years old, have it serviced to see whether it is safe to use.
About the Author
Bob Shobi researches and writes about general radiation issues and cell phone radiation (EMF) related subjects.
Learn More:
Read and get more info on Microwave radiation
The hazards and dangers of Cell phone radiation
Learn how to Protect yourself and shield radiations
