Dr Karl

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Listed below are the latest 50 comments taken from every post on the website.

The end of the internal combustion engine?

Marcel Dayan

Friday 25th October 4:25 pm

Hi Dr Karl, As always, a very interesting talk on the subject. However, there is a practical aspect of the wholesale change to electric cars that I think has been overlooked. It is very well explained in this email that I received recently from a friend. It is an eye opener. Charging Electric Cars.. A friend recently did some work for the body corporate at the Dock 5 Apartment Building in Docklands in Melbourne to see if they could install a small number of electric charging points for owners to charge their electric vehicles. Following the first three applications, they discovered the following: Our building has no non- allocated parking spaces ie public ones. This is typical of most apartment buildings so we cannot provide shared outlets. The power supply in the building was designed for the loads in the building with virtually no spare capacity. Only 5 or 6 chargers could be installed in total in a building with 188 apartments!! How do you allocate them as they would add value to any apartment owning one. The shit fight started on day one with about 20 applications received 1st day and many more following. The car park sub-boards cannot carry the extra loads of even one charger and would have to be upgraded on any floors with a charger as would the supply mains to each sub board. The main switch board would then have to be upgraded to add the heavier circuit breakers for the sub mains upgrade and furthermore: When Docklands was designed a limit was put on the number of apartments in each precinct and the mains and transformers in the streets designed accordingly. This means there is no capacity in the Docklands street grid for any significant quantity of car chargers in any building in the area. It gets better. The whole CBD (Hoddle Grid, Docklands) and Southbank is fed by two sub stations. One in Port Melbourne and one in West Melbourne. This was done to have two alternate feeds in case one failed or was down for maintenance. Because of the growth in the city /Docklands and Southbank now neither one is capable of supplying the full requirement of Melbourne zone at peak usage in mid- summer if the other is out of action. The Port Melbourne 66,000 volt feeder runs on 50 or 60 year old wooden power poles above ground along Dorcas Street South Melbourne. One pole is located 40 cm from the corner kerb at the incredibly busy Ferrars /St Dorcas St Intersection and is very vulnerable to being wiped out by a wayward vehicle. The infrastructure expenditure required would dwarf the NBN cost excluding the new power stations required. These advocates of electric vehicles only by 2040 are completely bonkers. It takes 5-8 years to design and build a large coal fired power station like Loy Yang and even longer for a Nuclear one (That’s after you get the political will, permits and legislative changes needed ). Wind and solar just can`t produce enough. Tidal power might but that’s further away than nuclear It's just a greenies dream in the foreseeable future other than in small wealthy countries. It will no doubt ultimately come but not in the next 20 years.

Dark matter

Lars Andersson

Thursday 10th October 1:28 pm

It appears the Dark Matter theory is primarily (if not totally) created as an explanation to problems to do with gravity. Perhaps, then, the actual problem is our way of conceptualising/understanding gravity. Maybe it's time for a reboot of our understanding of gravity. Which may then also lead to a formulation of the elusive Grand Theory, which seems to be obstructed by gravity as the one "force" that refuses to play according to the 'rules'.

5G hysteria is coming …

David

Friday 27th September 5:26 pm

Is it possible that qualcom snap dragon chips that will be used in the 5G internet of things from tshirts that upload your heart beat and temprature to the glasses that can unlock your doors and turn your lights on ... could this data be used against individuals in deceptive sales or marketing techniques ? Is there appropriate security measures in place to prevent foreign ownership and sales of this metedata ?

5G hysteria is coming: part 2

Dennis Matthews

Wednesday 25th September 2:42 pm

I see there is some reports of 5G stopping some birds migrating and confusing them magnetically (and potentially other migrating wildlife). With thousands of 5G satellites being placed in space is this an issue?

Dissing the dishwasher

Steven

Friday 13th September 8:55 pm

Do the studies on water usage take into account that you still have to hand wash some items, e.g. cutting knives, chopping boards, some types of cookware, and you could hand wash the rest of the items in the same water?

5G hysteria is coming …

Mary Crutcher

Thursday 20th June 6:57 pm

Why has there been an increase in brain tumors, especially in younger people. Some medical Doctors believe it is from mobile phone use.

Mass of a proton: part two

David Johnson

Tuesday 18th December 1:22 pm

Hi Dr Karl I would like to suggest an interesting read regarding the structure of quarks from preons, and from there to nucleons. The link to the article ‘The Photoelectric Effect, Wave-Particle Duality and Atomic Structure’ is http://vixra.org/pdf/1812.0276v1.pdf. Hopefully you will find it interesting in the context of your 'Mass of a Proton' discussion.

Future Space Travel

Dean Newbey

Monday 3rd December 11:37 am

Hey Dr Karl I read your books and i think they are awesome because of the questions. Also it has so much information.

How many cells in a person?

17 SCIENCE BLOGS EVERYONE SHOULD FOLLOW - ATA Scientific

Monday 26th November 5:35 pm

[…] way) scientific questions. From the beautiful act of vomiting, to the overwhelming-grand ‘how many cells in a person?’, Kruszelnicki seeks to entertain and educate in a laidback and educational manner that young and […]

A1 vs A2 milk

Hilton Deeth

Tuesday 19th June 2:21 pm

Dear Dr Karl, With regard to your article on A1 vs A2 milk, I'd like to draw your attention to a 2017 paper "Identification of bioactive peptides and quantification of b-casomorphin-7 from bovine b-casein A1, A2 and I after ex vivo gastrointestinal digestion" by Tora Asledottir et al. (International Dairy Journal 71 (2017) 98-106. The abstract of that paper is pasted below. It shows that Pro-67 is not part of beta-casomorphin-7 which is the peptide 60-66. Furthermore this peptide is produced from both A1 and A2 variants of beta-casein. Abstract: This study investigated whether different genetic variants of b-casein (b-CN) give rise to different bioactive peptides during digestion. b-CN was purified from bovine milk of genetic variants A1, A2 and I, and digested with human gastrointestinal juices in a static ex vivo model. Mass spectrometry analyses revealed that the peptide 60YPFPGPIPN68 was exclusively identified from variants containing proline at position 67. Most strikingly, the opioid peptide b-casomorphin-7, 60YPFPGPI66, was identified from both variants A1 and A2 after simulated digestion, though with concentration being somewhat higher after digestion of the variant A1, compared with variants A2 and I. The peptides 134HLPLP138 and 133LHLPLP138 were both identified after initial 5 min of duodenal digestion. In conclusion, genetic variation of b-CN may affect proteolysis during digestion; however, the release of b-casomorphin-7 (BCM7) does not seem to be linked solely to variant A1, as earlier suggested by relevant published literature on in vitro digestion. Kind regards Hilton Deeth Emeritus Professor of Food Science University of Queensland

Life on Saturn’s moon Enceladus

Luke

Thursday 7th June 11:58 am

I just don't see there being fish Dr karl on Enceladus more likely some kind of squid with hooks... hooks just so they don't get shot into the stratosphere when an giza goes up.

Australian breakthroughs: dark energy

Frank Grandi

Friday 10th November 11:32 am

Pushed apart or pulled apart? Could the perfect vacuum of infinite space beyond the 'sphere' of the observable universe be exerting a force of attraction on matter within the relatively congested, lesser vacuum of Big Bang-contaminated space? And if so, might this infinite, perfect vacuum contribute to the accelerating expansion of the observable universe?