1, Physics: Explore the relationship between buoyancy and liquid density and displaced liquid volume.
(8 points)
Equipment preparation:
Stone (the volume tied with iron wire is about 100 cm3 ~ 150 cm3), a large beaker of salt water (about 800ml ρ > 1. 1g/cm3), a large beaker of water and a spring dynamometer (range 5N).
Title Card 2: Experiment Name
1, Physics: Measure the resistance of a small light bulb when it emits light normally (8 points).
Equipment preparation:
Two dry batteries (batteries), a small lamp holder (with a small 2.5V bulb), 1 switch, 1 sliding rheostat, 1 ammeter, 1 voltmeter and several wires.
Title card 3: experiment name
1, Physics: Measure the electric power when the small light bulb normally emits light (8 points).
Equipment preparation:
2 dry batteries (battery box), small lamp holder (with 2.5V light bulb), 1 sliding rheostat, 1 switch, 1 ammeter, 1 voltmeter, and several wires.
Title Card 4: Experiment Name
1, physics: measure the density of brine (8 points)
Equipment preparation:
Tray balance (weight) 1 measuring cylinder 1 salt water, a large glass and a small beaker.