The Sunday Session with Francesca Rudkin Newstalk ZB

Megan Singleton's on her eighth visit to New Orleans - and the city keeps giving her new stuff to check out.

She's highlighted the live music, lively nightlife scene, the food, and the architecture of the city.

Read more about her recommendations for New Orleans in this guide here.

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The Ministry of Time by Kaliane Bradley. In a near future London the Government’s experimenting with time travel, bringing five people from various points in history into the 21st century where they’re confronted by the internet, dating apps and Spotify. Implausible though this sounds, it’s fun, highly entertaining and works brilliantly - and I never, ever read time travel but have happily made an exception. It’s wonderful and highly, highly recommended.

Nothing Significant to Report by Dario Nustrini. Dario was just a year out of school when he decided to join the NZ Army, with absolutely no idea what to expect. This is hilarious and highly entertaining - he tells about the back breaking exercises designed to grind down the new recruits, to roleplaying in an SAS manhunt – in a series of self deprecating stories about misfits, mayhem and camaraderie.

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This week on the Sunday Panel, PR Agency 818 Managing Director Chris Henry and ZB Wellington Mornings host Nick Mills discussed the following issues of the week- and more!

There's a record number of Kiwis heading offshore to Australia - and they're not coming back. How can we keep skilled workers in the country? How can we make New Zealand more rewarding for people.

The cost of living is continuing to bite, with Whittaker's confirming they plan to increase their chocolate prices in the coming days. Are more of us cutting back on our favourite things? What have we given up?

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Shift work - work that starts before 8am or finishes after 6pm - has been found to take a toll on sleep habits and overall wellbeing.

Shift workers, including truck drivers, cleaners, police officers, healthcare workers and security staff, are more at risk of developing fatigue-based conditions and eating poorly.

Naturopath and wellness expert Erin O'Hara says shift workers will need to plan ahead and take medication to keep themselves healthy.

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Spaghetti with roasted cauliflower pesto
Cook time: 10 minutes

Prep time: 30 minutes

Serves: 6

Roasted cauliflower pesto

1 head cauliflower, cut into small florets

1 cup basil leaves, chopped 1 cup parmesan, finely grated

zest and juice of 1 lemon

1 cup almonds, toasted and crushed

1/4 cup sunflower oil

1 red chili, de-seeded and diced

Sea salt and pepper

500g of Spaghetti

Handful of fresh rocket

Extra parmesan

1 extra lemon

Pre-heat the oven to 200*c

Heat a large pot of salted water. Once boiling, carefully drop the cauliflower into the water. Count to ten before removing with a slotted spoon and cool quickly in some iced water. Drain.

Place the cauliflower into bowl, drizzle with oil and season with sea salt. Place the cauliflower onto a roasting tray and cook until its just starting to char on the tips. Remove and cool.

Chop up the cauliflower into smaller pieces before placing into bowl with the rest of the pesto ingredients.

If you using dried spaghetti, cook in salted water until the pasta is al dente

Remove the spaghetti with tongs and toss in a bowl along with the cauliflower pesto

Serve with the fresh rocket and extra parmesan cheese and a squeeze of lemon.

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Did you know that you can tell whether water that is being poured is hot or cold just by listening to it?

Have a listen to this.

Which one was the cold water?

If you thought the 1st one, you were correct!

In general hot water sounds duller and frothier than cold water and now a new research paper published on arXiv has determined why.

The sound of pouring water into an empty container consists of three parts:

1 - The resonance of the air – this is the vibration of the air inside the container as it is forced out as the water takes its place.

2 – The vibration of the container and of the water as it is being poured.

3 – The sound of bubbles.

You might not have thought about the sound of bubbles before, but the next time you are at the beach, listen to a wave breaking. The sound generated is created due to a dense plume of tiny bubbles forming within the surface water. The size distribution of these air bubbles determines what the wave sounds like.

Previous research has shown that larger air bubbles in liquids create lower-frequency sounds.

In this water study, a high-resolution camera was used to video the bubbles formed when both hot and cold water were poured into a container. They found that pouring hot water resulted in large bubbles with a radius of 5-10 millimetres, whereas cold water only produced small bubbles with a radius of 1-2 millimetres.

Minneart resonance law says that the sound frequency produced by a bubble is inversely proportional to the radius of the bubble, and using theoretical calculations the researchers predicted that bubbles with a radius of 1-2mm would emit frequencies ranging from 1500-3000 Hz, and bubbles with a radius of 5-10mm would emit frequencies around 300-600 Hz.

Amazingly, that was exactly what was found in the sound recordings and explains why we can hear the different between hot and cold water being poured.

So why does hot water make fewer but bigger bubbles?

It’s all to do with viscosity, or how runny a liquid is. Hot water is less viscous or runnier than cold water - and as the viscosity of a liquid increases, the size of the bubbles generated decreases.

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