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Which of the following could occur as a result of decreasing the heat energy of a gas?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
Tobias rode his bike on a road for a 2 hr period. On average, he passed a 1 km marker every 3 min during this period. Which of the following was his average speed for this 2 hr period?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
A student is investigating potential and kinetic energy by stretching a spring across a table. When the student lets go, the spring recoils. At which time is potential energy in the spring being converted into kinetic energy in this system?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
Oxygen and iron combine chemically to form rust. Rust is classified as which of the following?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
A glass is partially filled with water. Five ice cubes are placed in the glass, causing the level of the water to reach the rim of the glass. Which of the following statements best explains the increase in water level?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
Water is changing from the liquid phase to the gas phase as it boils in a beaker. Which of the following statements explains why this cannot be used to prove that matter is conserved during a change of phase?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
Which of the following is produced when two or more elements combine in a chemical reaction?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
Ms. Bristol measured the mass of a closed beaker containing several ice cubes. The mass was 100 g. After the ice cubes had melted, Ms. Bristol measured the mass of the beaker again. What was the mass of the beaker of water the second time?
The volume of the submerged ice is equal to the volume of water displaced.
condensation
when the spring is recoiling
The change of phase is taking place in an open system.
a compound
20 km/hr
100 g
compound
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