Why does a piece of tile or stone feel colder than a piece of wood even though both are at same temperature? Answer. Answer: Stone conducts heat at least 10 times better than wood – so it sucks the heat away from your hand. In tile, which is a thermal conductor, the flow causes the […]
Is Chernobyl still radioactive in 2019?
Is Chernobyl still radioactive in 2019? The ruins of the Chernobyl reactor, now contained under a metal shell, are still highly radioactive and will likely remain so for up to 20,000 years. Why did Valery alekseyevich legasov kill himself? He was buried at the Novodevichy Cemetery in Moscow. While not Legasov’s first suicide attempt, David […]
Is 2Mg O2 2MgO exothermic?
Is 2Mg O2 2MgO exothermic? 2Mg+O2–> 2MgO + Heat. This is an exothermic reaction. Is mg o2 -> 2mgo balanced? Now, there are equal amounts of magnesium atoms and oxygen atoms on both sides, and so the equation is balanced. What kind of reaction is mg o2? Oxygen and magnesium combine in a chemical reaction […]
What is melting point of naphthalene?
What is melting point of naphthalene? 80.26 °C What happens to naphthalene at its melting point? Freezing Point is the Melting Point This would be the melting point of naphthalene. After melting is complete, the temperature will begin to rise again until it reaches 218o C. It will stay at that point until boiling is complete. […]
What is the biggest box of Crayola crayons you can get?
What is the biggest box of Crayola crayons you can get? Crayola manufactures 120 different Crayola Crayon colors, not including specialty colors. The 120 count box includes all the standard colors. The 120 count box can generally be found at WalMart and Target, or for your convenience, it may be available for purchase online at […]
Which metal is used in clinical thermometer?
Which metal is used in clinical thermometer? Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. What are five sites for measuring body temperature? The most common ones […]
What is NaCl formula unit?
What is NaCl formula unit? Sodium chloride , commonly known as salt (although sea salt also contains other chemical salts), is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. With molar masses of 22.99 and 35.45 g/mol respectively, 100 g of NaCl contains 39.34 g Na […]
Does rubber shrink when heated?
Does rubber shrink when heated? Polymers like rubber shrink on heating as their molecular chains curl up, and water shrinks when warmed from its freezing point to around 4°C. After that, though, it behaves normally, and expands on warming. In contrast, so-called negative thermal expansion (NTE) materials never behave themselves. Why does rubber shrink when […]
Are electrolyte drinks better than water?
Are electrolyte drinks better than water? Though water should always be your first drink of choice, there may be certain scenarios where a sports drink is exactly what your body needs. If you’re participating in high-intensity workouts lasting more than 45 minutes to an hour, sports drinks may help replenish your body’s electrolyte stores better […]
When can a hypothesis be elevated to the status of a theory?
When can a hypothesis be elevated to the status of a theory? If a refined hypothesis survives all attacks on it and is the best existing explanation for a particular phenomenon, it is then elevated to the status of a theory. A theory is subject to modification and even rejection if there is overwhelming evidence […]