Physics Practice: Physical Quantities and Measurement (Mock Test 3 - Advanced)
1. A density bottle weighs $25 \text{ g}$ when empty, $50 \text{ g}$ when filled with water, and $45 \text{ g}$ when filled with an unknown liquid. The Relative Density of the liquid is:
2. When water is cooled from $10^\circ\text{C}$ to $0^\circ\text{C}$, its density first ________ and then ________.
3. Why do water pipes often burst in cold countries during winter?
4. To find the volume of a piece of cork using a measuring cylinder, we must use:
5. If an object floats with 1/4th of its volume above the surface of water, its density is:
6. A ship rises slightly when it sails from a river into the sea because:
7. The mass of a lead piece is $115 \text{ g}$. If the density of lead is $11.5 \text{ g/cm}^3$, its volume is:
8. A body sinks in a liquid if the buoyant force (upthrust) is ________ its weight.
9. The R.D. of Mercury is $13.6$. What is the mass of $5 \text{ cm}^3$ of mercury?
10. A Plimsoll line on a ship's hull is used to:
11. A body of mass $m$ and density $d$ is broken into two equal parts. The density of each part is:
12. Which of the following represents the largest volume?
13. The density of a gas is generally ________ than that of a liquid.
14. To find the density of a liquid using a density bottle, we need its:
15. An object $X$ sinks in water but floats in mercury. This means:
16. The speed of a body is doubled. If the distance remains the same, the time taken will:
17. $1 \text{ kg/m}^3$ is equal to ________ $g/cm^3$.
18. A balloon filled with Hydrogen gas rises because:
19. Density bottle is a small ________ flask with a glass stopper.
20. If two liquids $A$ and $B$ are mixed (without volume change), the density of the mixture is: