Physicshard · Past Paper
A piece of wood floats in water with 1/4th of its volume above the surface. The density of wood is:
A250 kg/m³
B750 kg/m³
C500 kg/m³
D1000 kg/m³
✓ Correct Answer: B — 750 kg/m³
Submerged volume is 3/4. Density = (3/4) * Density of water = 0.75 * 1000 = 750 kg/m³.
Share this question
More from Physics
- If a force of 10 N is applied on an object and the object does not move, the work done by the force is:
- A train 100m long is crossing a bridge of length 200m at a speed of 72 km/h. The time taken is:
- If the area of contact is halved, while keeping force constant, the pressure will:
- The energy transformation in a hydroelectric power plant is:
- For a convex lens, where should an object be placed to get a virtual and magnified image?