a spring scale
A hydrometer is commonly used to measure the specific gravity of a liquid. It is a glass or plastic tube with a weighted bottom that floats in the liquid, and the specific gravity is read at the level of the liquid where the hydrometer surface intersects.
An instrument that measures surface weather is a thermometer. It allows meteorologists to monitor and track temperature changes at the Earth's surface, providing valuable data for weather forecasting and analysis.
Try a tape measure and a calculator to measure surface area.
A spirit level.
This is known as a seismometer or seismograph.
To minimize the drift on instrument you will want to lay it in the center of low gravity and close t the table surface. Which makes the base dimensions large compared to the height of the center gravity.
scale
A spring scale is an instrument that measures the force needed to move an object along a surface. It works by stretching a spring in proportion to the applied force, allowing the measurement of force in units such as newtons or pounds.
A tiltmeter measures changes in the tilt of the earth. :)A tiltmeter is an instrument that measures changes in the tilt of the earth. :)
An absolute altimeter is an instrument which measures vertical distance to the surface below a certain reference point.
The reason we don't float is gravity. The force of Gravity keeps us to surface, and the surface is also forced by gravity. You don't float away from the Earth because of gravity. The strength of gravity on each planet differs depending on its distance from the sun, whos gravitational pull keeps us and the other planets going around and around.-CalicoPonies
The answer will depend on what characteristic of the object is being measured: its mass, volume, surface area, colour, density etc.