Science workspace
Try it, see it, understand it.
Change the numbers and watch the results update — a quick way to check your workings in physics and chemistry.
Ohm's law (V = IR)
Current I = V ÷ R = 3.000 A · Power P = VI = 36.00 W
Projectile motion
Time of flight 2.89 s · Range 40.8 m · Max height 10.2 m (g = 9.8 m/s²)
Molar mass and moles
Molar mass = 98.07 g/mol · 49 g = 0.4996 mol
Try Ca(OH)2, NaCl, C6H12O6.
Digital practical bench
Do the experiment, record, calculate
Practice simulations modelled on WAEC/NECO practical tasks. They train method and calculation; they do not replace handling real apparatus.
Physics: simple pendulum (find g)
Set L, start the stopwatch, stop after 20 oscillations, then record. Repeat for at least 5 lengths.
0.00 s
Oscillations counted: 0
| L (m) | t for 20 osc (s) | T (s) | T² (s²) |
|---|
Precautions: small angle, swing in one plane, count from the rest line, avoid parallax. Your hand timing adds real error, just like in the lab.
Chemistry: acid–base titration
Burette: 0.100 mol/dm³ HCl. Flask: 25.0 cm³ NaOH with phenolphthalein: the pink colour fades as acid is added. Stop at the first permanent colour change.
Initial reading: 0.50 cm³ · Current reading: 0.50 cm³
#f5f5f5Read the bottom of the meniscus at eye level to 2 decimal places; take concordant titres within 0.10 cm³. The end point changes every session.
Biology: food tests
Pick a sample, add each reagent, and record the observation and inference.
| Test | Observation |
|---|---|
| — | |
| — | |
| — | |
| — |
Chemistry: identify the cation
Run the tests on unknown salt X, then name the cation. Use 'New unknown' for another salt.
Physics: verify Ohm's law
Increase the number of cells, read the voltmeter and ammeter, record, then check V/I stays constant.
V = 1.46 V
I = 0.27 A
| V (V) | I (A) | V/I (Ω) |
|---|
Precaution: open the key between readings so the cells don't run down and the wire doesn't heat up.
Physics: focal length of a converging lens
Move the object, then record where the sharp image forms on the screen. Plot 1/v against 1/u.
Sharp, real, inverted image at v = 30.0 cm
| u | v | 1/u | 1/v |
|---|
Physics: principle of moments
An unknown mass hangs 20 cm left of the pivot. Slide the 50 g mass on the right until the metre rule balances.
Not balanced yet.
Biology: osmosis in potato strips
Soak 5 cm potato strips for 30 minutes in sucrose solutions of different strength and measure the change in length.
Change in length: +0.60 cm — strip is firm (water entered).
Values are a teaching model; real potatoes vary. Find where the change is zero to estimate the cell sap concentration.
WAEC & NECO practical preparation
Practical drawings
Plant cell
A generalised plant cell, not a microscope observation.
- Cell wall
- Supports and protects the cell.
- Cell membrane
- Controls movement of substances into and out of the cell.
- Nucleus
- Contains genetic material and controls cell activities.
- Vacuole
- Contains cell sap and helps maintain turgidity.
- Chloroplast
- Contains for .
- Cytoplasm
- Site of many cell reactions.
Do not give an animal cell a cell wall or chloroplasts. A real specimen may have a different outline.