Laboratornaia Rabota 3 Opredelenie Poverkhnostnogo Natiazheniia Zhidkosti Po Fizike 10 Klass Otvety < Direct | Edition >

You will need a pipette or medicine dropper, a beaker of water, a small empty beaker for collecting drops, sensitive scales (electronic or balance), and a caliper (shtangentsirkul) to measure the tube diameter. 2. Measure the Diameter Use the caliper to measure the inner diameter of the dropper tip. Convert this value to meters ( 3. Collect Data Weigh the empty beaker ( M1cap M sub 1 Carefully count exactly drops (e.g., 50 or 100 drops) into the beaker. Weigh the beaker with the water ( M2cap M sub 2 Calculate the total mass of the water: Calculate the mass of a single drop: 4. Calculate Plug your values into the formula:

In the Russian Grade 10 physics curriculum (typically following the Myakishev textbook ), focuses on measuring the surface tension coefficient ( ) of a liquid—usually water. 🧪 Quick Lab Overview: Method of Drops You will need a pipette or medicine dropper,

The most common method for this lab is the , which relies on the balance of gravity and surface tension forces at the moment a drop breaks away from a tube. Objective: Determine the surface tension of water. Formula: = mass of one drop. = acceleration due to gravity ( = internal diameter of the pipette or tube. 📝 Step-by-Step Execution 1. Gather Equipment Convert this value to meters ( 3

Surface tension as temperature increases because molecules move faster and weaken intermolecular bonds. What if you add soap? Calculate Plug your values into the formula: In

Surface tension forces act to minimize the surface area for a given volume, and a sphere has the smallest surface area. ⚠️ Common Errors to Avoid

Soap is a surfactant (PAV) that significantly the surface tension of water. Why do drops form spheres?