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.

Filter by
Sorted by
Tagged with
0
votes
0answers
37 views

What physics experiments can I do at home? [closed]

during this pandemic I had couple of physics experiment to do for my homework. They included beer foam decay, ball inertia experiment and so on. Now I have a final homework where I alone need to come ...
0
votes
1answer
36 views

Two connected syringes filled with water: What happens when the plunger is moved outwards?

Suppose we have two syringes -- both in the halfway position -- filled with water and connected by a tube (there is no air in the system, only water). If we push one of the syringe plungers in, then ...
0
votes
0answers
26 views

Does Mutual Inductance Affecting my Headphone?

I am hearing small murmuring sound in my headphones which are connected to my laptop only when my electricity is fluctuating.My laptop charger is disconnected from mains.The headphones wire is close ...
0
votes
0answers
32 views

Can there be a kinetic energy to gravity energy transfer? [closed]

I'm trying to finish my physics project and I'm trying to describe the energy transformations. If a ball rolls on an ramp (suspended on a wall) and then falls - is there kinetic energy to gravity ...
-1
votes
2answers
67 views

Why is it hard to exercise with wearing the mask? [closed]

In today with COVID 19, we should wear the mask all day. My teacher in Korean high school said "If you want to play basketball, you could play with wearing the mask" to me. My friends and I wanted to ...
8
votes
0answers
61 views

What is the minimal equipment required to observe the Apollo lunar retroreflectors?

It's rather well known that the Apollo lunar landings installed retroreflectors on the Moon, and that these can be used to reflect laser beams back at Earth, to measure the Earth-Moon distance to ...
18
votes
1answer
705 views

Why isn't the surface of this frozen iced tea smooth?

Why is the surface of the iced tea in the pictures below so uneven? To give more details, today I tried (and failed) making iced tea. I placed a cup of hot water, after removing the tea bag, in my ...
0
votes
0answers
16 views

Parallelising light rays from a laser projector using planoconvex lens

Materials: 26mm Dia x 35.2mm FL, Grade 1, Plano-Convex Lens. PicoP laser picoprojector. The problem: I've got a question about using a lens to parallelise light rays coming from a laser projector. ...
0
votes
4answers
40 views

I need help devising a classroom experiment to detect the magnetic field generated by a current in a wire

I want to devise a simple procedure that can be followed by students to discover that a current in a wire produces a magnetic field near that wire. I am of course restricted to very simple materials, ...
0
votes
1answer
28 views

Angular velocity of a conic pendulum [closed]

Some year 12 circular motion questions for you. I have an experiment where an object of m mass is tied to a string of L length. Centripetal force (Fc) is known along with m and L. The object is spun ...
0
votes
0answers
13 views

Demonstrating iridescence with a ripple tank

There are several wave phenomina that can be demonstrated using a ripple tank, including reflection, diffraction and refraction. But is it possible to demonstrate iridescence, either by creating a ...
-1
votes
1answer
26 views

Is ambient temperature a continuous function [closed]

Following the standard topology examples of Borsuk–Ulam theorem, did someone checked experimentally that ...
1
vote
1answer
41 views

Accurate method or instrument to measure density of shaving cream foam or whipped cream foam?

I am currently filling a "standard" stainless steel cup of known volume with foam and then I weigh it. Then I calculate density. This method is pretty messy and I have to be careful about how I fill ...
0
votes
1answer
23 views

Rotation calculation of an imbalanced object

Let's assume I have a scale like object hanging from a point. Now if I put an object inside it stays as it is, as we have replaced the spring with some sort of fabric, that doesn't expand itself. ...
1
vote
0answers
41 views

Why is the shadow behaving like this? [duplicate]

When approaching a sheet of paper between the sun and an object (a Lego here) the shadow of the object seems to get bigger as in this video. Can you please explain why? Thank you! :)
16
votes
3answers
226 views

Why does pouring tea to a plate make directional jets?

I noticed that pouring tea from a cup to a plate leads to a horizontal jet of the fluid. ( You can click on the image to see video) The jets were linear and extended to both the directions from its ...
0
votes
2answers
114 views

What are the reasons behind the different period in vertical and horizontal circular motion?

Why does hand-spinning a small mass in a vertical circular motion produces different period if the same mass is spun in a horizontal circular motion given that the radius, slotted mass are kept the ...
1
vote
2answers
69 views

“Bananagrams” under black light? [closed]

There is a game called “Bananagrams” which includes a bunch of pieces with a letter on each. It seems when I shine a black light flashlight on the letters, the “M” letters glow, but no other pieces do....
0
votes
0answers
32 views

Projecting a telescope image

Is it possible to theoretically project image of telescope without digital technology? If so, how can I do this?
1
vote
0answers
22 views

Why does this small protrusion from the shadow of a vertical edge appear in this set up?

I am seeking an explanation to this observation concerned the shadow of a ball on a wall or a screen when the shadow of the ball is approaching the shadow of a vertical edge. In this setup, the ...
0
votes
2answers
52 views

Constant angular velocity in vertical circular motion?

I want to do the following vertical circular motion experiment, where I "hand spin" a rotating mass (red) that is attached to the same string with the slotted mass at the other end. I spin the mass by ...
0
votes
1answer
36 views

Moment of inertia of a Cardan/Hooke joint?

I'm working on a model that approximates a rotating body as a double Cardan joint: one of these guys. In my scenario, torque is applied to the center shaft and both end shafts are free. The angle ...
3
votes
1answer
109 views

Is the slotted mass responsible for the centripetal force in vertical circular motion?

Is the slotted mass responsible for the centripetal force in a vertical circular motion in this particular experiment? I want to do the following experiment, where I hand spin a mass (red) that is ...
1
vote
0answers
42 views

Coldest temperatures achievable in DIY enthusiast/hobbyist setting

Assume I, as a physics DIY enthusiast, would like to cool a little piece of material down to coldest possible temperatures, for my own entertainment or my private curiosity/research ambitions. We all ...
2
votes
1answer
36 views

Another noodle boiling effect - bubbling when pushing noodles down

The very day I read a noodle boiling question here, I discovered the following effect: Noodles (German Spätzle to be exact) were boiling in a standard open pot. Salted water. I turned down the heat ...
14
votes
1answer
828 views

Why does spinning water lift its contents?

This used to be one of my favourite experiments in my childhood. When the water in a glass is put into a spin by a DC motor from the top, the things lying at the bottom gets lifted to the top. The ...
9
votes
2answers
107 views

Why does a spinning rod create transverse waves?

I attached a ballpoint pen refill to a DC motor and made it spin very fast. Instead of just turning along its axis, the refill started to wobble around to make a transverse wave. You can see that ...
2
votes
2answers
173 views

Vertical circular motion experiment - feasible? [closed]

I am thinking of comparing horizontal to vertical circular motion. I think I want to compare (both experimentally and mathematically) the constant tension of horizontal to the varying tension of the ...
20
votes
1answer
321 views

Explaining The Unbelievable Pendulum Catch

What would be a theoretical explanation of an "ideal" 14:1 mass ratio in this experiment, also demonstrated in this video? The experiment ties one nut to one end of the string and 14 nuts to the ...
0
votes
0answers
23 views

How to test electrostatics exist or not on a surface?

Is there any way to test if a surface is still electrostatically charged or not? Better with something available in daily life such as attracting a piece of paper or hair. The case is that I wear ...
3
votes
2answers
56 views

Outside temp of vessel of is 40 Deg C and Water inside it is 86 Deg C.. Why?

I was boiling water in a steel utensil. Used Fluke's IR Gun (59 Max) to measure the temperature of Water inside AND the surface temp of vessel outside. The boiling water read 86 Deg C whereas the ...
7
votes
3answers
97 views

Why does warm water and cold water make different sounds?

Why is there a different sound when pouring water for it being warm or cold? Pouring cold water makes a higher pitch sound than warm water. The difference is clearly distinguishable. I was unable to ...
0
votes
1answer
43 views

Homework/Lab question about my data analysis

I in the experiment, I have tried to find a relationship between a quantity B and quantity I. First I plotted the raw data into a graph and tried different curve fits in excel. This is the graph that ...
16
votes
1answer
214 views

Why does pepper not stick to the glass with print inside my pepper shaker?

So I have this pepper shaker made of glass with a print on it: One fine dinner, it ran out of pepper, so I opened the lid to fill it up and noticed a peculiar thing – small particles of pepper dust ...
0
votes
0answers
24 views

How to calculate acceleration using ADXL345? [duplicate]

I am trying to measure the acceleration and deceleration of a bike by using an 3 axis accelerometer (ADXL345). I know the formula of calculating acceleration using the $x,y,z$-components with respect ...
1
vote
1answer
44 views

AC vs DC electromagnet problem

I've created a large electromagnet using a 12" long, 3" diameter mild steel core. I'm using 18 awg magnet wire. Wire length is 3000 ft which gives me approximately 3600 turns with resistance at 18 ...
1
vote
1answer
95 views

Why did my coffee get heavier?

So I have just made my girlfriend a cup of coffee, for the first time using her method. Ignore how correct the method is, but I figure it is important to mention: Step 1: 37g* of coffee beans are ...
0
votes
0answers
16 views

membrane for a reverse osmosis desalination experiment

We are second year cram schoolers , we are currently working on a project tackling water desalination by reverse osmosis and are required to do an experience. During the process, we encountered some ...
2
votes
2answers
198 views

Closed Room Experiment to prove Earth isn't flat

With Focault's pendulum, it is possible to demonstrate in a closed room that the Earth Rotates with respect to an inertial reference frame. And allowing guests to inspect and manipulate the pendulum ...
1
vote
1answer
44 views

Home experiment to measure specific gravity of liquids

The problem states: invent to a way to measure specific gravity of various liquids in assorted bottles given 1 test tube 1 small vial of mercury 1 pen 1 ruler 1 beaker of water (500 ...
1
vote
1answer
40 views

Why does potential gradient in a potentiometer wire depend only on driving cell [closed]

The title is pretty much self explanatory.I have done some calculations. I am considering this circuit analogous to a potentiometer, where $E_1$ is my driving cell and $R_1$ and $R_2$ make up the ...
66
votes
3answers
10k views

Why does water falling slowly from a tap bend inwards?

This is something anyone could easily verify. When we open a tap slowly, water bends inwards (towards the axis) while maintaining its laminar flow. After a certain height below the opening, the flow ...
3
votes
1answer
75 views

Pitch of sound in half fill glass

I read in my physics book that when we use a spoon and vibrate a glass, the pitch should be according to the air column inside. So, less filled the glass, longer the air column and lesser the ...
0
votes
1answer
42 views

How do I make my image sharp?

I created a homemade projector for my phone using a shoebox and a magnifying glass lens of 90 mm focal length. The idea was to put my phone between F and 2F to obtain a real, inverted and enlarged ...
0
votes
1answer
68 views

Why does this sine wave like pattern appear in cut plastic?

I was opening a package that was plastic wrapped from the super market with the prong of a fork, and this pattern (in the picture) emerged: I started by poking the prong of the fork (right side of ...
2
votes
1answer
82 views

Tabletop experiment that demonstrates the “electric charge comes in discrete unit”

James Gleick writes in his Feynman biography (Genius) that The difficulty concerned the electron, the fundamental speck of negative charge. AS a modern concept, the electron was still young, ...
1
vote
1answer
38 views

How often do positrons appear in a typical Wilson cloud chamber?

I would like to know a rough estimate of how often positrons appear per meter cubed per second in a typical Wilson cloud chamber based off of your experience. I'm interested in the same quantity for ...
0
votes
0answers
29 views

Why do magnetic duct connections snap together so perfectly?

An interesting video is floating around on Facebook that provides a good view of a dryer duct snapping together. The wall magnet is fixed and flush with the wall. Since the dryer hose is flexible, ...
2
votes
2answers
435 views

Might a cast iron pan set on top of a microwave oven affect the operation? [closed]

Our microwave seems to take longer to get the job done these days. I notice that someone is storing a large, heavy cast iron pan on the top of the microwave. Is there any way at all that it is ...
1
vote
1answer
27 views

Do I need a Fresnel lens to make a ripple tank work?

I would like to build a ripple tank but I don't really know if I need a fresnell lens to make the projection or not, and why would it be needed in case it does?

1
2 3 4 5
12