Who predicted properties of undiscovered elements? Mendeleev What are elements that have some properties of metals and some properties of nonmetals called? Metalloids may act either like metals or nonmetals in chemical reactions. Most metalloids have some physical properties of metals and some physical properties of nonmetals. They fall between metals and nonmetals in their […]
Does aluminum expand faster than steel when heated?
Does aluminum expand faster than steel when heated? The coefficient for aluminum is 2.4, twice that of iron or steel. This means that an equal temperature change will produce twice as much change in the length of a bar of aluminum as for a bar of iron. Lead is among the most expansive solid materials, […]
What size beam do I need to span 10 feet?
How do you classify a metal?
How do you classify a metal? The elements can be classified as metals, nonmetals, or metalloids. Metals are good conductors of heat and electricity, and are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire). Is Silicon harmful to humans? Silicon crystalline irritates the skin and eyes on contact. […]
Why does my hair stand up when I rub a balloon on it?
Why does my hair stand up when I rub a balloon on it? This is because the rubbing creates a negative charge that is carried by electrons. The electrons can build up to produce static electricity. Consequently, when you pull the balloon slowly away from your head, you can see these two opposite static charges […]
What are soil remediation techniques?
What are soil remediation techniques? Remediation techniques which have been commonly used include: containment, pump-and-treat, extraction, stabilization/solidification, soil washing, air stripping, precipitation, vitrification, thermal desorption and biological remediation. What are the methods of soil remediation? Options for treating contaminated soil include: Biological treatment/bioremediation uses bacteria to break down substances in the soil. Chemical oxidation converts […]
Where does most of the heat in the atmosphere come from?
Where does most of the heat in the atmosphere come from? the sun What causes the atmosphere to heat up? Due to the chemical composition of the earth’s atmosphere, most of the infrared radiation emitted by the warm surface never reaches space. Instead the radiation is reflected or absorbed by compounds known as greenhouse gasses. […]
What is not affected by the force acting on an object?
What is not affected by the force acting on an object? A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there’s the interaction between two objects they exert a force on each other, these exerted forces are equal […]
Which investment is the best for someone who is likely to need cash soon?
Which investment is the best for someone who is likely to need cash soon? savings account is the answer. Step-by-step explanation: Saving account is the only option that can be used by someone who is likely to need cash soon. The mutual funds cannot be withdrawn before three years as the amount will be taxable. […]
How safe is Autobahn?
How safe is Autobahn? Is the Autobahn safest? Research by the Federal Highway Research Institute states that the Autobahn experiences fewer vehicle-related fatalities than the U.S. This means this German highway experiences fewer deaths per billion miles traveled than American highways. Which country has highest speed limit? Poland What is highest speed limit in USA? […]