How far is the core from the crust? The ball-shaped core lies beneath the cool, brittle crust and the mostly-solid mantle. The core is found about 2,900 kilometers (1,802 miles) below Earth’s surface, and has a radius of about 3,485 kilometers (2,165 miles). Do you need planning permission to dig out a basement? Excavating to […]
Why do objects transfer heat?
Why do objects transfer heat? All matter contains heat energy. Heat energy is the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. The transfer or flow due to the difference in temperature between the two objects is called heat. How is heat different from temp? Heat […]
What are waves in everyday life examples?
What are waves in everyday life examples? Transverse waves ripples on the surface of water. vibrations in a guitar string. a Mexican wave in a sports stadium. electromagnetic waves – eg light waves, microwaves, radio waves. seismic S-waves. Do phones really fry your brain? Mobile phones release radiofrequency energy, or radio waves, that can be […]
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 […]
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 […]
Are work and impulse the same?
Are work and impulse the same? Impulse is a vector, so a negative impulse means the net force is in the negative direction. Likewise, a positive impulse means the net force is in the positive direction….Common mistakes and misconceptions. Impulse Work Changes an object’s momentum energy Quantity type vector scalar What does kW mean in […]
What are the factors responsible for evolution?
What are the factors responsible for evolution? The four factors of evolution are: mutation, gene flow, genetic drift, and natural selection. Genetic drift has much more effect in small populations, which may have an allele drift to fixation, in which all members have that allele. Why do individuals not evolve? Individual organisms do not evolve, […]
Will AC work if thermostat is bad?
Will AC work if thermostat is bad? Under most circumstances, a bad thermostat will not have any effect whatsoever on the air conditioning system. The AC system is a completely separate entity; the only connection it has to the engine is at the compressor pulley, which derives its power from the crankshaft. How do I […]
Which of the following is a factor of chemical effectiveness?
Which of the following is a factor of chemical effectiveness? Temperature factor of chemical effectiveness states that chemical sanitizer works best in lukewarm water. What chemical sanitizer is highly effective on variety of bacteria yet generally? Chlorine based sanitizers are the most commonly used sanitizers. They are effective against all bacteria and are fairly inexpensive. […]
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 […]