Question 1
Because of the high heat and low humidity in the summer in Death Valley, California, a visitor requires about one quart of water for every two miles traveled on foot. If the density of water is 0.990 g/mL at 45°C, how many kilograms of water are required for a person to walk 30 kilometers in Death Valley?
◦ 3.5 × 10
2 kg
◦ 8.7 kg
◦ 7.0 × 10
2 kg
◦ 70 kg
Question 2
Specific gravity of a liquid is often defined as the ratio of the density of a substance to the density of water. If the specific gravity of X relative to water is 0.800 and the specific gravity of Y relative to water is 1.50, which of the following statements is
false?
◦ If X is a liquid, Y will float on X.
◦ If Y is a liquid, X will float in Y.
◦ If X is a solid, X will float in water.
◦ If Y is a liquid, water will float on Y.