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Questions tagged [home-experiment]

questions concerning measurements, experiments, and activities that demonstrate physics and are safe to do at home, require at most one tool or ingredient not readily available, and can be interpreted or analyzed on one sheet of paper with accessible math.

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$V = 4 volts$ but $I = 0$

Recently in my school, I tried to generate electricity from plants in a flower pot with copper and Zinc electrodes. The Potential difference in the voltmeter read 2 to 3 volts but when I connected the ...
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0answers
20 views

Finding the Equation for Water-flow Experimentally

I am interested in finding the formula for water flow experimentally. I used different pipes for this. 3 pairs, each pair has two pipes, same diameter, different lengths. The taller one of pipes in ...
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2answers
64 views

Did diffraction bend this light more than 90 degrees?

Earlier I asked whether diffraction could bend light more than 90 degrees. earlier question Lambda gave me an answer. He stuck a razor blade into a piece of wood, and he shone a green laser at it, ...
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1answer
54 views

Simple experiment proving air pressure is stronger than water pressure at sea level [closed]

I conducted a simple experiment I: pour a little of water into a cup, put a card on top & turn all upside down. The card does not fall $\Rightarrow$ $$P_i + P_w < P_o\tag{1}$$ $P_i$ : air ...
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1answer
44 views

Time taken by a Magnifying Glass to heat Metal [closed]

I would like to know how long would it take for a small or medium sized mag. glass to heat a black painted metal particularly aluminum since I can't do the maths.
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3answers
49 views

Common microwave absorbing substances

I'm looking to demonstrate to class of students how microwave absorption works, but I need something relatively common which I can easily make into a board. Does anyone have any suggestions for ...
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1answer
54 views

Diffraction using a phone

I used my phone to create a diffraction pattern and measure the number of pixels along the horizontal. I used the formula in the picture and calculated everything using readings ive added in the ...
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3answers
61 views

Is it possible to suggest a physical experiment in which measurement errors are dramatically increasing? (due to the accumulation of errors)

Is it possible to suggest a physical experiment in which measurement errors are dramatically increasing? (due to the accumulation of errors) Maybe some magnetic field can be used here? Or any other ...
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1answer
30 views

How do I experimentally measure the resistance from using dielectric grease on battery posts?

The internet gives lots of contradicting advise about greasing or not greasing car battery posts to prevent corrosion. So rather than rely on the internet, I want to perform an experiment so that I ...
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1answer
37 views

Can Fresnel zone plates be used as collimators

I quite often use the principle in physics that (outside of thermodynamics), all laws of physics are time-reversible. And so, when looking at collimating microwave light, I though that it might be ...
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2answers
33 views

Experiments using cheap, low-power radio

In lecture, I've been using an expensive (\$2000) 10 GHz microwave demo setup consisting of a transmitter and a receiver. It can be used to demonstrate things like the transverse polarization of ...
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1answer
27 views

At Home Experiment Shows Permanent Magnetic Field Does Not Refract

For an at home experiment I positioned a magnetic field so it would cross a boundary from air into water. I wanted to see if it would experience refraction similar to the refraction seen in ...
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2answers
90 views

Why the rubber ball bounced higher than the glass ball

For a teaching degree we did the following experiment: Drop a rubber and a glass ball of approx. same size from approx. same height onto laminate flooring. As we expected, the rubber ball bounced ...
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0answers
46 views

How to demonstrate the Photoelectric effect?

I’m looking for a simple experiment to present (as an extra) to my class regarding the photoelectric effect but I don’t have many materials. From my understanding when UV light is incident on a ...
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1answer
26 views

Dynamic friction

In my house, we are debating whether when you scrub the floor it is easier or more difficult to drag a piece of furniture. My floor is made of marble, who's right?
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1answer
28 views

How to maximize the efficiency of a portable air conditioner? [closed]

I have a small window AC unit that I occasionally use to rapidly cool my apartment. As I was placing it in my window today I was thinking of how I could maximize it's efficiency so that it either ...
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2answers
96 views

What’s wrong with my cloud chamber setup?

For my setup, I am using a fish tank, lined with black felt and with one side open for viewing and a slit on a side for the light. I have a pretty bright multi led flashlight. I am using dry ice ...
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1answer
118 views

If we have density and mass why should we have gravity?

In a cup filled with different solutions with different densities if we put objects of different masses they will sink to different layers ... and this can be explained by mass and density so what is ...
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0answers
44 views

Sequential Stern-Gerlach experiment on a budget

The sequential Stern-Gerlach experiment is important for historical and theoretical reasons; it demonstrates in a conceptually simple manner the consequence of having non-commuting observables with ...
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0answers
67 views

Why do we blow on the “hurricane balls” only after they begin spinning?

In the hurricane balls phenomenon, we have 2 balls welded together and by spinning them first by hand on the smooth tabletop, we are then able to accelerate it by blowing a through a nozzle at the ...
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1answer
62 views

Can I trap mosquitos with Coulomb's force? [closed]

Can I fill a metallic conductor with a very large positive charge, attach it with a insulator to a wall, put it near a window under the sun (visible light and UV in order to cause it to expell ...
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0answers
25 views

Surface fluctuations in the combustion of ethanol in a woosh bottle

A whoosh bottle demonstration typically involves igniting ethanol vapor in a large bottle with a narrow opening. The rapidly expanding gas creates the whooshing noise as it vacates the container. This ...
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0answers
15 views

Advice on debugging ultrasound standing wave setup

I'm trying to set up an ultrasonic standing wave powerful enough to levitate polystyrene - on a budget (i.e. nothing's quite what I'd like it to be ;)). I have not yet successfully demonstrated a ...
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1answer
43 views

Detecting Earth’s Changing Speed Will My Idea Work?

Is there a way to detect the earth’s changing speed as it orbits the sun? I’m thinking of an at home experiment. It would be a plumb bob suspended in a tube about ten feet in length. There would be a ...
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1answer
56 views

Electromagnet works on and off

I'm working on an small electromagnetic motor and made one of the coils for it to test. The black spool is 3D printed (so maybe my problem is that I don't have the coil wrapped around a ferromagnetic ...
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1answer
110 views

Why does not a bubble in a thick hand sanitiser not rise?

Here is a picture of a bubble trapped inside a thick hand sanitiser. These bubbles never rise despite not sticking to the walls! They just remain stationary, in the middle of the liquid, despite the ...
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0answers
58 views

Why does bread sticks on a hot pan? [closed]

What causes a slice of bread when placed on a non stick (hot) pan without much oil/butter to stick to it. And why does it not in presence of butter or oil ?
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0answers
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How much electricity does it take to create hydrogen from water depending on the water's pressure?

Imagine creating bubbles of hydrogen and oxygen underwater at a particular depth using electricity. Then reusing the energy of the bubbles going upward to the surface ( buoyancy ). How is the energy ...
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1answer
39 views

Multilateration of Sound in 3D Space

TL:DR - How can you find the 3D coordinates of a emitter than transmits an impulse signal? STORY: I'm working on something to improve my bird-watching. I've got a camera that can take pictures of ...
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0answers
23 views

What is the proportionality between volume and momentum passed on in a collision?

I am designing a simple experiment with a setup as follows Simply put, I am rolling a marble into a light plastic bucket (cup) and seeing how far it swings in a ballistic pendulum. I can get the ...
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3answers
96 views

What is an experiment to teach my daughter about steam (water) pressure?

On a recent steam train trip my daughter said to me: Daddy, I'd like to pull that steam engine apart and see how it works. Now there are two parts to her question - and I'm only make this physics ...
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3answers
89 views

Why do really cold objects evaporate really quick? [closed]

So I saw a video of LNG (liquid natural gas) and when it got in contact with water, which was room temp the LNG evaporated instantly...why? Ice takes a while to evaporate like a sec even when hot ...
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0answers
26 views

How to Measure Rotational Motion

As part of my physics Personal Investigation, I am looking at a bifilar pendulum, which is best describes as a spinning kid's swing. I wanted to plot onto PASCO Capstone the motion, showing it was ...
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0answers
22 views

How does a blender manage to mill kiwi seeds in a smoothie?

I'd think, in a blend of kiwi, apple and banana and little bit orange juice kiwi seeds would rotate with the blender's knife, but they get milled. Why is that?
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2answers
68 views

Not seeing a diffraction pattern, what could be the cause?

Basically took a piece of paper, cut out a small slit with some scissors, and held my phone's flashlight right on the slit. What could be causing the lack of diffraction? Does the fact that the light ...
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1answer
37 views

Investigating 2D Oscillating motion

I once did an experiment into Simple Harmonic motion of a mass oscillating in 1D on a spring. I wanted to extend this into two dimensions. I can see how varying the starting offset and also ratio of ...
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1answer
20 views

Wind direction affecting temperature,

I am working on a paper for a Graduate School class and I wonder how can I create an experiment that shows how wind direction affects temperatures? I understand the concept myself however I want to ...
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1answer
154 views

Static charge in polyethylene

I work in a factory that manufactures polyethylene sheets, and I find that despite the fact that there are devices for preventing static electricity in the process (ion instrument, corona wire, etc.), ...
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1answer
106 views

Can I make a rainbow in shower?

As droplets of shower acts like rain, and say a light bulb will take place of sun. In this scenery, is it possible to make a rainbow?
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1answer
40 views

Can I measure light intensity using only .jpg pictures?

I have two pictures. On first one can see a lamp shining straight into my smartphone's objective and on the second picture one can see the same lamp but covered with a piece of paper. Can I use those ...
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0answers
41 views

Why does oil not stop on a crease

I did an experiment in class where we had to roll different liquids down a ramp for viscosity. the ramp was a CD case covered in tin foil. Two of the liquids we used were water and oil. When the water ...
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2answers
82 views

Can I suck water out of a full bottle?

If i have a bottle full of water (there's no air in the bottle) with a straw in it and the bottle is sealed completely without any opening except the straw, will i be able to suck water out of the the ...
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2answers
110 views

When wood absorbs water, expands, and breaks stones, how is conservation of energy working?

There is a traditional stone cutting method consisting of making a series of small holes in the stone, then inserting wood into the holes, and then adding water to the wood. When the wood expands, it ...
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0answers
59 views

Force to separate magnets

I need to know how much force it takes to separate two magnets or a magnet from a piece of metal. I've bought a spring scale that measures max 50 grams, so it's very accurate. Now what if I attach ...
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1answer
31 views

Energy Generation through magnets

Lets say we had two magnets, one much larger than the other. Then we put the larger one in the center and force the smaller one into an orbit around the large one using the magnetism force as the ...
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1answer
326 views

Determining the mass of a rolling cart

If I have a cart that has a force sensor on it and then I have the available supplies: Motion sensor, computer to read the motion and force sensors, weights and weight holder, wood blocks (tilt the ...
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1answer
135 views

Explanation for possible interference on a home mirror?

I've noticed that a few peculiar things about home commercial mirrors that aren't present with industrial/scientific mirrors. This is one of the mirrors I used. With the mirror like the one above, ...
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1answer
540 views

Electric Motor Project Not Working

Long time reader, first time poster :) I'm a first year physics teacher in a high school, and I'm running a science fair where students research their own topics and create demonstrations. One group ...
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2answers
173 views

How do I find the equivalent resistance between positions A,B, C and D in this diagram? [closed]

So I am a prelab assignment where I need to calculate the equivalent resistance between two assigned points. Here is my attempt so far: The thing that is troubling me is the point C and D, where the ...
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1answer
26 views

How can I objectively measure the KE delivered by a foam projectile, without a complicated experiment?

I help out with refereeing a Live Action Roleplay System, in which NERF blasters are used to simulate guns. Modifying those NERF blasters to deliver foam over longer distances is allowed and outright ...