Physics Final Conceptual Questions

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10g of water is added to 10g of ice in an insulated container. Will all of the ice melt?

The hole in the plate and the opening in the ring get larger

A steel plate has a hole in it with a diameter of exactly 1.0 cm when the plate is at a temperature of 20 ∘C. A steel ring has an inner diameter of exactly 1.0 cm at 20 ∘C. Both the plate and the ring are heated to 100 ∘C. The hole in the plate and the opening in the ring get larger. The opening in the ring gets larger, but we need the relative size of the plate and the hole to know what happens to the hole. The hole in the plate gets smaller, and the opening in the ring gets larger. The hole in the plate and the opening in the ring get smaller. The hole in the plate gets larger, and the opening in the ring gets smaller.

Conduction and Convection

A typical thermos bottle has a thin vacuum space between the shiny inner flask (which holds a liquiand the shiny protective outer flask, often stainless steel. The vacuum space is excellent at preventing conduction. conduction, convection, and radiation. convection. radiation. conduction and convection.

The temperature of the gas

An ideal gas is in a sealed, rigid container. The average KE of the gas molecules depends most on - The number of molecules in the container - The mass of the molecules - The temperature of the gas - The size of the container

Yes, the water could be changing phase

As heat is added to water, is it possible for the temperature measured by a thermometer in the water to remain constant? Maybe; it depends on the rate at which the heat is added. Yes, the water could be changing phase. Maybe; it depends on the initial water temperature. No, adding heat will always change the temperature.

Equal

Both beakers A and B in the figure contain a mixture of ice and water at equilibrium. Which beaker is the coldest, or are they equal in temperature?

Convection

By which primary heat transfer mechanism does a stove heat a pot of soup? conduction radiation convection

Conduction

By which primary heat transfer mechanism does one end of a steel rod become hot when the other end is placed in a flame? radiation convection conduction

Radiation

By which primary heat transfer mechanism does the Sun warm Earth? radiation conduction convection

Each is at the same temperature

For objects at thermal equilibrium, which of the following is true? For objects at thermal equilibrium, which of the following is true? Each has the same heat. Each has the same internal energy. Each is at the same temperature. All of the above. None of the above.

The amount of energy transferred between objects as a result of a difference in temperature

Heat is fluid called caloric. the amount of energy transferred between objects as a result of a difference in temperature. measure of the average kinetic energy of atoms. invisible, odorless, weightless substance. the total kinetic energy of an ideal gas.

The helium atoms will be moving faster than the oxygen molecules, on average

In a mixture of the gases oxygen and helium, which statement is valid? - Both will be moving at the same speed - The KE of the helium atoms will exceed that of oxygen molecules - The oxygen molecules will, on average, be moving more rapidly than the helium atoms - The helium atoms will be moving faster than the oxygen molecules, on average - None of the above

By any object not at 0 K

Radiation is emitted only by objects whose temperature is greater than the temperature of the surroundings. by any object not at 0 K. only by objects with more caloric than their -surroundings. only by glowing objects such as the Sun. only by objects that have a large specific heat.

Rod A = Rod B

Rod A has twice the diameter of rod B, but both are made of iron and have the same initial length. Both rods are now subjected to the same change in temperature (but remain solid). How would the change in the rods' lengths compare? Rod has twice the diameter of rod , but both are made of iron and have the same initial length. Both rods are now subjected to the same change in temperature (but remain solid). How would the change in the rods' lengths compare? Rod A > rod B. Rod B > rod A. Rod A = rod B. Need to know whether the rods were cooled or heated.

All of the above

The linear expansion of a material depends on which of the following? The linear expansion of a material depends on which of the following? The change in temperature of the material. The length of the material. The type of material. All of the above. Both the change in temperature and the type of the material.

The pressure, volume, or both may increase

The temperature of an ideal gas increases. Which of the following is true? - The volume must increase while the pressure decreases - The pressure, volume, or both may increase - The pressure must decrease - The pressure must increase - The pressure must increase while the volume decreases

The cooler one

Two equal-mass liquids, initially at the same temperature, are heated for the same time over the same stove. You measure the temperatures and find that one liquid has a higher temperature than the other. Which liquid has the higher specific heat? The cooler one. The hotter one. Both are the same.

The one with the lesser mass

Two objects are made of the same material, but they have different masses and temperatures. If the objects are brought into thermal contact, which one will have the greater temperature change? The one with the lower initial temperature. The one with the higher initial temperature. The one with the lesser mass. The one with the higher specific heat. The one with the greater mass. Not enough information.

Heat flows from the tea into the ice cube

When you put an ice cube in a glass of warm tea, which of the following happens? When you put an ice cube in a glass of warm tea, which of the following happens? Heat flows from the tea into the ice cube. Neither heat nor cold flows. Only temperature flows between the ice and the tea. Cold flows from the ice cube into the tea and heat flows from the tea into the ice cube. Cold flows from the ice cube into the tea.

Temperature

Which of the following does the internal energy of an ideal gas depend upon? Which of the following does the internal energy of an ideal gas depend upon? The internal energy depends upon its temperature. The internal energy depends upon its volume. The internal energy depends upon its pressure.

Heat flows into or out of the material

Which of the following happens when a material undergoes a phase change? The temperature changes. The molecules break apart into atoms. The chemical composition changes. Heat flows into or out of the material.

- Liquid water expands with increasing temperature above 4°C. - Solid ice is less dense than liquid water.

Which of the following statements are true? - Water contracts as it freezes at 0°C. - Liquid water expands with increasing temperature between 0°C and 4°C. - Liquid water expands with increasing temperature above 4°C. - Solid ice is less dense than liquid water.

Kelvin

Which temperature scale does NOT have negative values?