An equal-arm beam scale consists of a beam with two arms of equal size on either side. In this post, we’re going to cover all the different types of musical scales, the theory behind them as well as how to form them. Let’s get started. They’re sometimes called the church modes or the greek modes. Some scales feature both digital and mechanical displays. I actually have a whole post about minor scales here: https://hellomusictheory.com/learn/minor-scales/. Simplistic equal-arm scales were the earliest type of scales to become available. For more info about the types of minor scales check out my post here. Grocery scales are used in food stores and supermarkets, farmers markets, bakeries and candy stores, seafood markets and by butchers – effectively anywhere a non-prepackaged food commodity is sold by weight. Another example would be "strongly agree," "agree," "neither agree nor disagree," "disagree," "strongly disagree." He graduated from The Royal Academy of Music in 2012 and then launched Hello Music Theory in 2014. Most bars will have two slides – one which measures pounds (or kilograms) and another that measures ounces (or grams) to provide a very accurate weight. Lisa has a Bachelor’s of Science in Communication Arts. This means that the third note of the scale is three semitones above the first note, unlike major scales where the third note of the scale is four semitones above. Major keys are quite often associated with the music feeling happy or joyful whereas minor keys are known for music that sounds sad or melancholy. Most of these scales are regularly inspected by state agencies. They will usually measure weight in a range of up to 350 to 800 pounds. The cost for truck scales can run $10,000 to $50,000 and higher, not counting installation. The next type of scale that we’re going to look at is the pentatonic scale. As so often the case something that appears complex can be explained in ways that make sense of it by someone with real understanding. Another popular type of weigh scale is the railcar scale. While in the past pendulum-type balance scales with a very wide range of counterweights often going down to 0.01g were used to measure precious items, today’s jewelry scales are almost exclusively digital. Tickets for being over-weight – particularly on bridges – can cost a driver tens of thousands of dollars. They are also often used to measure the weight of small pets, such as cats or guinea pigs. Kitchen scales are usually quite compact, are placed on the counter when used, and are easy to wash and store. They usually have a tare feature that makes it easy to continually weigh ingredients in the same bowl without having to dirty other bowels or dump out the bowl being used. Minor Scales. There is an old trick question that goes: Which weighs more – a pound of feathers or a pound of bricks? One of the most widely utilized of all industrial scales, the grocery scale has been used for hundreds of years to determine the price of the food we eat. Both mechanical and digital truck scales are in common use today; because of the weights they deal with, digital truck scales utilize a load cell to determine weights. In some applications, scales perform exactly the same function today. They are also often used by hunters and fisherman to weigh larger animals and fish, often at the point of kill or catch. These scales are usually only found in doctor’s offices, hospitals or clinics. Digital scales utilize batteries, are connected to an electrical outlet, or hardwired to another power source. Normally installed on a concrete or steel foundation, truck scales can be over eighty feet long. While some doctors and hospitals have switched to using digital scales, the majority of physician scales manufactured today are highly accurate balance scales which utilize a slide bar on the top. Far less accurate ‘personal’ jewelry scales are also becoming popular, and can usually be found for under $50. These scales are used mostly by shipping companies and the manufacturers of low weight, high volume products (such as shipping noodles, some foam rubbers, etc.) Very informative material, thanks a ton wonderful information, looking for feel of the notes also can be added. Each mode has a different sound, some are major and some are minor. Those equipped with height measuring rods will usually measure up to seven feet. Research and HCPB scales will usually start at $20,000 and can run into hundreds of thousands of dollars for highly specialized types. Most of these scales will be calibrated at least down to the milligram (1/1,000th of a gram), the standard unit of measurement for most prescription medicines, while the most sophisticated type of this scale (called a microbalance) can measure to one nanogram – one billionth of a gram. 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