# Tag Info

## New answers tagged home-experiment

0

Yes, the Leidenfrost effect plays a big part here. As the hydrogel balls aren't perfectly elastic (their restitution coefficient is smaller than one) they would quickly come to a halt but little jets of steam that are ejected by them when they hit the hot surface constantly provide extra upward force to compensate for inelastic losses. It's what keeps them ...

2

I gather that the large source of error you are worried about is the ability of the experimenter to accurately hit the start/stop button on the stopwatch at the start/stop of the ball's journey down the ramp. What is the approximate magnitude of error we'd expect? Before I directly answer your question, let's estimate how bad the experimental error will be ...

0

Nick Moore clicked it for my 12 year old daughter. She understands and can explain Lorentz Force very clearly and simply with little to no effort. She started Breezing through most of the technical data for her 6th grade science project on the Homopolar Motor. The Earth's magnetic field makes sense to her now. She gets how the northern lights are formed and ...

3

Let $m_1$ be the mass of the peas, which we'll assume to be mainly water, $m_2$ the mass of boiling water added and $m_p$ the mass of the pan. We'll assume no heat losses. After adding everything to the pan and allowing for thermal equilibrium to be established the temperature of pan, water and peas is $T$. $T$ can be calculated from the adiabatic heat ...

1

In addition to CuriousOne's fine answer, I'll point out that Dobsonians, while easy and cheap to build, are rather difficult to combine with a tracking mount. For really good photos (or faint objects), you'll be much happier with a slightly more expensive 'scope with an equatorial mount and a USB interface to your PC. In general, don't bother with an ...

3

An 8" telescope was state of the art in 1686 (even though a modern amateur instrument is certainly much better than Huygens' lenses were) and a normal DSLR sensor has only slightly better properties than plates that were used in astronomy up to the 1980s, so there isn't much gain there, in terms of instrument performance, over fairly old equipment... it's ...

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