DiscoverRNZ - All ProgrammesWhat is more efficient - filling the kettle with cold water or hot water?
What is more efficient - filling the kettle with cold water or hot water?

What is more efficient - filling the kettle with cold water or hot water?

Update: 2025-10-16
Share

Description

Professor Richard Easther, from the University of Auckland joins Emile Donovan to explain.
Comments 
In Channel
RNZ News at 10pm, October 16

RNZ News at 10pm, October 16

2025-10-1615:39

ABC Wantok Program for 16 October 2025

ABC Wantok Program for 16 October 2025

2025-10-1629:59

The rise of 'Healthization'

The rise of 'Healthization'

2025-10-1618:57

Who invented the mince and cheese pie?

Who invented the mince and cheese pie?

2025-10-1610:26

Myth Takes with Ben Jackson

Myth Takes with Ben Jackson

2025-10-1606:18

Melanesian Update for 16 October 2025

Melanesian Update for 16 October 2025

2025-10-1614:38

What is more efficient - filling the kettle with cold water or hot water?

What is more efficient - filling the kettle with cold water or hot water?

2025-10-1608:32

Guyon Espiner reflects on Jim Bolger's years in politics

Guyon Espiner reflects on Jim Bolger's years in politics

2025-10-1611:42

RNZ Pacific News at 8pm for 16 October 2025

RNZ Pacific News at 8pm for 16 October 2025

2025-10-1608:54

The Panel Plus for 16 October 2025

The Panel Plus for 16 October 2025

2025-10-1622:17

Moment of Calm: Songs of the Seagulls

Moment of Calm: Songs of the Seagulls

2025-10-1601:28

The Panel with Sue Bradford and Dean Hall, Part 2

The Panel with Sue Bradford and Dean Hall, Part 2

2025-10-1622:41

The Panel with Sue Bradford and Dean Hall, Part 1

The Panel with Sue Bradford and Dean Hall, Part 1

2025-10-1625:37

Most Australians keen to stick with US alliance, despite Trump

Most Australians keen to stick with US alliance, despite Trump

2025-10-1606:04

Evening business for 16 October 2025

Evening business for 16 October 2025

2025-10-1603:57

Evening sports updtate

Evening sports updtate

2025-10-1605:26

Hello Fresh fined for misleading customers

Hello Fresh fined for misleading customers

2025-10-1606:52

Hutt Hospital ED doctor on planned strike action

Hutt Hospital ED doctor on planned strike action

2025-10-1608:59

Health Minister scolds senior doctors over strike plans

Health Minister scolds senior doctors over strike plans

2025-10-1604:19

RNZ News at 5pm, October 16

RNZ News at 5pm, October 16

2025-10-1609:11

loading
Google Play
Download from Google Play
Castbox
Download from App Store
usUnited States
00:00
00:00
x

0.5x

0.8x

1.0x

1.25x

1.5x

2.0x

3.0x

Sleep Timer

Off

End of Episode

5 Minutes

10 Minutes

15 Minutes

30 Minutes

45 Minutes

60 Minutes

120 Minutes

What is more efficient - filling the kettle with cold water or hot water?

What is more efficient - filling the kettle with cold water or hot water?