Question
Mercury has become a serious toxic waste. It is
found in which of the following instruments?Solution
Mercury is a heavy silvery-white metal that is liquid at room temperatures. It is commonly used in thermometers, nano-meters and barometers, thus it is present in nearly every chemistry and physics lab. Confined in such instruments mercury itself is not likely to cause health problems, but if there is a means for mercury vapor to enter the environment, these highly toxic vapors present a health hazard.
A fluorescent lamp tube is filled with a gas containing low pressure mercury vapor and argon, xenon, neon, or krypton. Fish can absorb methyl mercury from their food and directly from water as it passes over their gills.
Which one of the given mathematical operations will result in 429?
Select the correct combination of mathematical signs to replace the '@' signs and balance the given equation.
22 @ 6 @ 18 @ 17 @ 2
If A $ B means A X B, A € B means A ÷ B, A & B means A + B and A @ B means A - B, then what is the value of '178 & 100 € 25 @ 18 $ 4 & 22'?
...After interchanging the given two signs, what will be the value of the given equation? + and ÷
128 - 45 ÷ 72 + 9 X 11
By interchanging the given two numbers (not digits), which of the following equations will be correct?
24 and 15
I. 113 + 24 - 17 X 1...
Which two signs should be interchanged to make the following equation correct?
9 × 10 ÷ 2 – 4 = 51 + 2Â
If '$ means +', '# means –, '@ means ×' and '* means ÷', then what is the value of ' 16 $ 4 @ 5 # 72 * 8 ' ?
...Select the correct combination of mathematical signs that can sequentially replace the sign * and make the equation correct.
5 * 14 * 6 * 8 * 9 * 502
- Which two signs should be interchanged to correct the given equation?
5 + 3 × 8 – 12 ÷ 4 = 3 - If '+' means '-', ' X ' means '+', '-' means '÷' and '÷' means ' X ', then what is the value of the following expression?
54 ÷ 6 X 117 - 9 + 68
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