Water Level

A look at what is currently available on eBay


Whirlpool & Kenmore Water level switch FSP
Whirlpool & Kenmore Water level switch FSP
US $12.99
European style multi-level water droplets pearl fashion bracelet
European style multi-level water droplets pearl fashion bracelet
US $25.60
Water Level Sensor Liquid Float Switch Tank Pool Steel
Water Level Sensor Liquid Float Switch Tank Pool Steel
US $5.99
Water Liquid Level Float White Plastic Switch Sensor
Water Liquid Level Float White Plastic Switch Sensor
US $4.91
Liquid Water Level Sensor Floating Switch w 12.2
Liquid Water Level Sensor Floating Switch w 12.2" Cable
US $12.39
AC 220V Water Level Sensor Floatless Relay 61F-GP-N
AC 220V Water Level Sensor Floatless Relay 61F-GP-N
US $21.27
Pool Stainless Steel Float Switch Liquid Water Level
Pool Stainless Steel Float Switch Liquid Water Level
US $13.18
Water Level Controller Stainless Steel Float Ball New
Water Level Controller Stainless Steel Float Ball New
US $6.12
Liquid Water Level P.P Float Switch NO NC Black for Aquarium
Liquid Water Level P.P Float Switch NO NC Black for Aquarium
US $7.88
ZPC6 Horizontal Water Level Sensor Liquid PP Float Switches NO NC Black Pair
ZPC6 Horizontal Water Level Sensor Liquid PP Float Switches NO NC Black Pair
US $9.14
Black Wired Right Angle Water Level Sensor Float Switch
Black Wired Right Angle Water Level Sensor Float Switch
US $11.36
Tank Liquid Water Level Sensor Horizontal Float Switches ZP3208-P 2 Pcs
Tank Liquid Water Level Sensor Horizontal Float Switches ZP3208-P 2 Pcs
US $6.91
Washing Machine Part Water Level Control Sensor Switch
Washing Machine Part Water Level Control Sensor Switch
US $6.71
Water Level Sensor Black Cable White PP Floating Switch
Water Level Sensor Black Cable White PP Floating Switch
US $5.93
Washing Machine 4 Position Water Level Switch Part DC 6V 10mA
Washing Machine 4 Position Water Level Switch Part DC 6V 10mA
US $4.65
Plastic Horizontal Floating Switch Liquid Water Level Sensor
Plastic Horizontal Floating Switch Liquid Water Level Sensor
US $8.79
Aquarium Liquid Water Level Sensor PP Floating Switches NO NC Pair
Aquarium Liquid Water Level Sensor PP Floating Switches NO NC Pair
US $11.64
Aquarium Horizontal Liquid Water Level Sensor Floating Switch
Aquarium Horizontal Liquid Water Level Sensor Floating Switch
US $4.13
2 x Horizontal Water Level Sensor Liquid Float Switches ZP2508-P
2 x Horizontal Water Level Sensor Liquid Float Switches ZP2508-P
US $6.94
Liquid Water Level Sensor White Vetical PP Floating Switch
Liquid Water Level Sensor White Vetical PP Floating Switch
US $5.35
Fish Tank Water Level Sensor Horizontal Floating Switch
Fish Tank Water Level Sensor Horizontal Floating Switch
US $4.62
Water Pump Float Switch Fluid Level Controller 250V
Water Pump Float Switch Fluid Level Controller 250V
US $24.43
38 x 26.5 x 9.5mm Water Level Stainless Steel Floating Ball
38 x 26.5 x 9.5mm Water Level Stainless Steel Floating Ball
US $6.45
2 x Horizontal Water Level Sensor Liquid Float Switches ZP7510-P
2 x Horizontal Water Level Sensor Liquid Float Switches ZP7510-P
US $7.02

Water Level
How high does the top of the ice block float above the water level?

A rectangular block of ice 13 m on each side and 1.7 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How high does the top of the ice block float above the water level?

The mass of the ice block is its volume multiplied by its density: 917*13*13*1.7 = 263454.1kg

The block therefore displaces 263454.1kg of water, due to Archimedes' Principle. Using the density of the water, this is equal to 257.03 metres cubed of water.

The height of a 13m by 13m rectangular block of water of this volume would be (257.03)/(13*13) which is 1.52m, which is 0.18m less than the thickness of the ice. The top of the ice will therefore float 0.18m, or 18cm above the surface of the water.

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