A stopwatch or a timer would be suitable to measure the time it takes to bring water to a boil.
You would measure it in litres
You would use the metric unit "liters" to measure the capacity of a hot water tank.
To measure a tub of water, you can use a measuring cup or a graduated cylinder to measure the volume of water in liters or milliliters. Alternatively, you can weigh the tub on a scale before and after filling it with water to determine the weight of the water in kilograms or pounds.
A water thermometer can be used to measure the temperature of water. To heat water, a stove, kettle, or microwave can be used depending on the quantity and purpose of heating.
For survival on a new planet, I would bring essential items like water purification tablets, a multi-tool, a solar-powered flashlight, and seeds for growing food. These items would ensure access to clean water, ability to repair objects, a sustainable light source, and a means to grow food for sustenance.
Which unit would you use to measure the water in a full tub?
You would measure it in litres
water
Gallons
Take a container with a rather precise scale and measure it. Place the ring inside and measure it again. The amount the water goes up is the volume of the ring. Or you could fill a container to the brim with water, with a collecting dish underneath. Put the ring in the container, which would cause some of the water to overflow. The volume of water that left the container is the volume of the ring. Or you could take a clay mold and make a mold of the ring, fill that with water and measure how much water it takes to fill the 3D mold.
you would need to bring a swim suit some sun screen and clothes and water
Volume is a measure of how much space an object takes up. In some cases, such as a cube, it's easy to use a ruler to measure all the sides and multiply. If such an option is not readily available, there are other alternative ways of collecting the volume. For instance, to see how much space an object takes up, you could measure how much water it displaces.
pounds
Water skis.
Litres
Push it down to measure the volume.
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