Whether it’s through the legendary heritage of Denon, the classic American strength of Polk Audio, the premium performance and minimalist cool of Definitive Technology, the highly-sought-after amplification and pedigree of Marantz, the action-inspired form factors of Polk BOOM, the wireless home audio solutions of HEOS, or the accessible performance of Boston Acoustics, everyone will find their sound here… however they want to enjoy it.
In addition to nicotine, cigarette smoke is primarily composed of a dozen gases (mainly carbon monoxide) and tar. The tar in a cigarette, which varies from about 15 mg for a regular cigarette to 7 mg in a low-tar cigarette, exposes the user to a high expectancy rate of lung cancer, emphysema, and bronchial disorders. The carbon monoxide in the smoke increases the chance of cardiovascular diseases. The Environmental Protection Agency has concluded that second hand smoke causes lung cancer in adults and greatly increases the risk of respiratory illnesses in children and sudden infant death.
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ومن أبرز أنواع المخدرات المنتشرة في لبنان الحشيشة، بسبب وفرتها وكثرة زراعتها في مناطق البقاع. تليها الأقراص المخدرة، وتحديداً الكبتاجون، وهي من مشتقات مادة الأمفيتامين، ثم الكوكايين والهيروين، وفق دراسة أعدتها "المؤسسة الدولية للمعلومات". مشيرةً إلى أن نسبة تعاطي الحشيش خلال السنوات الثلاث الماضية بلغت 39%، والهيروين 30%، والكوكايين 13%. ولفتت إلى أن 
من وجهة نظر الفيزياء فالصوت هو موجة. وتنتشر الموجة في السوائل والغازات ك موجة طولية وهي كذلك أيضا في الهواء؛ أي ينتشر الصوت مثلا في الهواء بطريقة يتردد فيها ضغط الهواء بطريقة دورية بمعنى منطقة هواء مضغوط يتلوه منطقة هواء مخلخل ويتلوه منطقة هواء مضغوط وهكذا. فيكون تغير الموجة في نفس اتجاه انتشار الصوت. أما في المواد الصلبة فينتشر الصوت في موجات عرضية (أي تكون موجاته عمودية على اتجاه انتشار الصوت). وتحرك موجات الصوت جزيئات الوسط (غالبًا الهواء) حول حالة وسطية بين الزيادة والنقصان (منطقة هواء مضغوط تتبعه منطقة هواء مخلخل تتبعه منطقة هواء مضغوط وتتبعه منطقة هواء مخلخل، وهكذا) وتنتشر في الهواء بسرعة خاصة، ويرمز لسرعة الصوت c. ولكي تنتقل موجات الصوت فهي تحتاج إلى وسط تنتشر فيه، مثل الهواء أو الماء أو السوائل أو في وسط مادة صلبة، مثل قضيب من النحاس أو حديد، كذلك نسمع الصوت عبر الحائط؛ ولا ينتشر الصوت في الفراغ.
A drug is addicting if it causes compulsive, often uncontrollable drug craving, seeking, and use, even in the face of negative health and social consequences. Marijuana meets this criterion. More than 120,000 people enter treatment per year for their primary marijuana addiction. In addition, animal studies suggest marijuana causes physical dependence, and some people report withdrawal symptoms.

Sound United today announced the commencement of Sound Start, a foundation dedicated to donating 10,000 instruments to children worldwide by the 2020-21 school year. In support of this goal, Sound United is pledging a percentage of Denon, Polk Audio and Definitive Technology sales to the Sound Start foundation. To execute the ambitious goal of 10,000 donated instruments, Sound United partnered with VH1 Save The Music Foundation.

First, Duncan deposited heat into the graphite sample using two crossed laser beams to create an interference pattern—alternating bright and dark regions that correspond to crests and troughs in the colliding waves of light. At the outset, the crests heated up the graphite while the troughs remained cool. But once Duncan switched off the lasers, the pattern would begin to slowly diminish as heat flowed from the hot crests to the cool troughs. The experiment would reach its end once the entire sample reached a uniform temperature. Or at least that is what typically happens. But when the lasers stopped shining, the graphite had other plans, continuing to allow the heat to flow until the hot crests became cooler than the troughs. This is rather like a stove top that becomes ice-cold the instant you turn it off rather than gradually cooling to ambient temperature. “That’s weird,” Nelson says. “Heat isn’t supposed to do that!”