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Archimedes Squeeze Experiment - Density values over 1g/cm3 not sinking? Archimedes Squeeze Experiment - Density values over 1g/cm3 not sinking? Hi there Question re Archimedes Squeeze experiment http://www.sciencebuddies.org/science-f ... -boat-sink which my daughter tried at home. When she did the experiment, the foil ball with a diameter of 2.8cm sank, with the longer diameters ranging on average from 10% submerged for 6cm, to 64% submerged for 4cm diameter to 90% submerged for 3cm. … Read more
Ask an Expert Topic Forum: Getting Started
How should we go about the project How should we go about the project [color=#000040:27pnv8po]Hi, my name is Kayla and my friend Jordan and I are part of the 9th & 10th NSSA stem program, and we are doing a project on the cocoa genome. But we have a problem, our problem is in terms of experimentation we don't know what to do. What do you recommend or suggest we do? Thank u -Kayla[/color:27pnv8po] Re: How should we go about the project Hello Kayla. Welcome to the site and thank you for… Read more
Catalase activity Catalase activity Hi, I am doing an Extended Essay project. My experiment was on measuring the catalase activity of cow (bovine), pig (sus scrofa)and chicken (Gallus Gallus). The results to this is that cow had high catalase activity, pig had 2nd fast activity and 3rd was chicken. But I don't exactly have an answer why it's the case. I have been trying to research on all sorts of areas but still couldn't find an answer. I researched on DNA sequences and comparison of them,… Read more
Ask an Expert Topic Forum: Grades K-5: Physical Science
centrifugal force centrifugal force Ask an expert: I am a parent of 3rd graders (twins) who have a science project coming up in 2-3 months. I would like to help them do projects on the topic of centrifugal/centripetal force. I did a project on this topic when I was in school, but I want to see if I can get an idea of how to do it better/execute it better. I based my project (at the time) on the amusement park ride called The Rotor ( the one where you are spun in a cylinder and then held… Read more
Algae Biofuel and Control Algae Biofuel and Control Hello I am part of Energy Project and are doing emphaty research for algae biofuel and containing the algae in a safe way. How can we prevent the algae from escaping its enclosure. What could attack algae and prevent it from growing as it should. Are there any specific environmental situations that prevents algae growth. Are there any common issues with algae we should be aware of. Do you believe that algae biofuel is a better… Read more
onion dna extraction onion dna extraction My daughter and I have performed this experiment about 6 times now and cannot really get the DNA to spool. It's really difficult to measure for comparison between different onions. Just wondering if we were doing something wrong. We've followed the instructions to our best ability and then tried slight variations within the instructions (ie pipetting the ethanol onto the top vs the bottom of the tube, etc. Thanks for any advice. Leanna and… Read more
Ask an Expert Topic Forum: Grades 9-12: Math and Computer Science
Factors You know About Hacking ? Factors You know About Hacking ? Moral Hacking is regularly alluded to as the method involved with infiltrating one's own PC/s or PCs to which one has official consent to do as such as to decide whether weaknesses exist and to attempt preventive, restorative, and defensive countermeasures before a genuine trade off to the framework happens. Source :… Read more
Ask an Expert Topic Forum: Grades 9-12: Physical Science
Iodine Clock Reaction | HCl Substitute?? Iodine Clock Reaction | HCl Substitute?? The Iodine Clock Reaction is a science project posted on Science Buddies measuring the reaction rate at which the dark blue complex takes to form. In the chemicals needed (provided by Science Buddies), HCl is included. Is there another alternative to the project to create the iodine reaction, perhaps without HCl? Or a possible substitute for HCl? I do not understand the need for HCl when another less… Read more
Ask an Expert Topic Forum: Grades 9-12: Physical Science
Soil Moisture Sensor Parts Soil Moisture Sensor Parts Hello, I was wondering if I can substitute a 74HC595 IC for a CD4011 NAND gate IC (which is part of the kit)? Also does a 470 MΩ resistor work better than a 330 MΩ; does it matter if I don't use those exact types of resistors? What are the differences and will the sensor still work? Re: Soil Moisture Sensor Parts Hi - are you sure you got the right part number for the 74HC595? When I search for that part it is described as a shift… Read more
Ask an Expert Topic Forum: Preparing for the Competition
Questions about ISEF and tips for my incomplete project? Questions about ISEF and tips for my incomplete project? Hi! I recently qualified for the ISEF 2022 through my regional fair. I'm really excited, but I'm really lost as well. This is my first time qualifying and I don't have any older siblings to help me out. So far, my project is incomplete. For my project, I trained a computer model to detect normal and cancer glands in endometrial carcinoma. I'm hoping to create a python model with… Read more
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