Do monitors use a lot of power? A 3 Watts average across 20 monitors per year is not nothing. Monitors typically have 3 power levels: On — you’re looking at one. Given that the average North American household uses about 1000 kWh/month, if your monitor were in actual use all month (720 hours) at 40 […]
What are some big picture questions?
How do I put the Y axis on the right side in Excel?
Why can a magnet attract an Unmagnetized nail?
Why can a magnet attract an Unmagnetized nail? Stroking material containing iron with a magnet, placing a piece of iron in the strong magnetic field, placing a piece of iron near a strong electromagnet. The reason a magnet can attract an unmagnetized nails is that? nails become temporarily magnetized in a magnetic field. Why can’t […]
Who found atom first?
Who found atom first? Democritus Why can’t scientists see inside an atom? Almost all of an atom’s mass comes from the protons and neutrons in the nucleus. However, because electrons orbit around the nucleus, most of an atom is empty space! You can’t see atoms with the naked eye, because they’re simply too small. Using […]
Is it possible for a solid metal ball to float in mercury?
What happens to kinetic energy when momentum is doubled?
What happens to kinetic energy when momentum is doubled? Kinetic energy is directly proportional to the squared of the velocity. This means that when momentum is doubled, mass remaining constant, velocity is doubled, as a result now kinetic energy becomes four times greater than the original value. Are momentum and kinetic energy the same? They […]
How do you find cosine 300 degrees?
How do you find cosine 300 degrees? Since cos(60∘)=12 , we know that cos(300∘)=12 as well since cos(θ)>0 in the fourth quadrant. Which of the following is equal to COS 300? Important Angle Summary θ° θradians cos(θ) 225° 5π/4 -√2/2 240° 4π/3 -1/2 270° 3π/2 0 300° 5π/3 1/2 Which of the following is equivalent […]
Why do electrons move freely in metals?
Why do electrons move freely in metals? The valence electrons of metals move freely in this way because metals have relatively low electronegativity, or attraction to electrons. The positive metal ions form a lattice-like structure held together by all the metallic bonds. When nonmetals bond together, the atoms share valence electrons and do not become […]