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
- Which of the following media has the highest speed of sound?
- What is the apparent depth of a 12 cm deep tank of water (n=4/3) when viewed from above?
- In a concave mirror, if the object is at infinity, the image is formed at:
- Two balls A and B of masses 1kg and 2kg are dropped from the same height. The ratio of their times to reach the ground is:
- If a car travels 100km at 40km/h and the next 100km at 60km/h, the average speed is: