Category: Physics

What increases when frequency increases? From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer. There are two basic types of waves: mechanical and electromagnetic. What is the highest frequency ever generated? At least ~100 GeV, which corresponds to 2*1025 Hz. I […]

What is the charge for calcium ion? 2 What type of ion does calcium form? Calcium, Ca Calcium is also in Group 2. It has two electrons in its outer shell. When these electrons are lost, a calcium ion, Ca 2+, is formed. A calcium ion has the same electronic structure as an argon atom […]

What force prevents an object from moving when pulled? Friction Does a heavier object move faster? The force of gravity is the weight of the body. Hence an object with greater mass feels greater force than the other one. So even if the slope is same for both objects, a massive object moves faster through […]

Can you get cancer from sitting in front of a heater? We know what it is, but there have been very few direct sources of interference to the natural body functions, that result in the mutations of the cell divisions, that is commonly called ‘cancer’. Sitting in front of an “infra Red” heater, is not […]

How long do rechargeable batteries last if not used? two to three year How do I know if my rechargeable batteries are still good? Yes – just check the cell voltage. NiMH are fully discharged at ~1V, so if any of your cells are going down to this quickly (after a few cycles) then they’re […]

What is a good weight to curl? According to Weis, men up to 120 pounds should be able to curl 70 pounds; men 121 to 135 pounds should be able to lift 85 pounds; men 136 to 155 pounds should ideally lift 105; men 156 to 170 pounds should lift 120 pounds; men 171 to […]

How do muscles get oxygen? Oxygen is supplied to the muscles via red blood cells. Red blood cells carry hemoglobin which oxygen bonds with as the hemoglobin rich blood cells pass through the blood vessels of the lungs. The now oxygen rich blood cells carry that oxygen to the cells that are demanding it, in […]

Is tens AC or DC? A standard TENS unit typically delivers a low-frequency (<50 Hz) alternating current to a focused treatment area. Due to the nature of low-frequency, however, these signals have a low capacity to overcome skin resistance – resulting in these units only providing pain relief via the Gate Control Theory while being […]

Why is the potential energy of a free particle zero? In quantum mechanics, it means the particle is in a region of uniform potential, usually set to zero in the region of interest since the potential can be arbitrarily set to zero at any point in space. … What is the energy of a free […]

What is a good question to ask about space? How does the expansion of the universe make outer space a vacuum? How large would a bucket of water have to be to put out the sun? How long before the expansion of the universe causes our earth to drift away from the sun? How long […]