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, […]
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 The mutual funds cannot be withdrawn before three years as the amount will be taxable. […]
What is the advantage of acceleration?
What is the advantage of acceleration? ➢ Accelerated students experienced higher levels of academic achievement in both high school and in college courses than non- accelerated students. Accelerated students enjoyed higher high school GPAs than non-accelerated students. How do you accelerate grades? One of the best-known forms of academic acceleration, grade skipping involves moving the […]
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 […]
Why is force inversely proportional to square of distance?
Why is force inversely proportional to square of distance? This is because the force acts uniformly in all directions from the point source and conserves the energy over the entire surface surrounding the point object. Since the surface is a sphere the area of the sphere is given as 4πr2. What is the inverse square […]
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. […]
Is dentist mirror real or virtual?
Is dentist mirror real or virtual? The dentist uses a CONCAVE MIRROR to observe a magnified image of the tooth. As we know, a concave mirror forms a virtual, erect and magnified image… How do doctors use concave mirror? If the object is placed between the focus and pole of a concave mirror, it provides […]