physics final (13, 14, 15)

the linear expansion of a material depends on which of the following? a) the length of the material b) the type of material c) the change in temperature of the material d) all of the above

all of the above

radiation is emitted a) only by objects whose temperature is greater than the temperature of the surroundings b) only by objects that have a large specific heat c) by any object not at 0 K d) only by objects with more caloric than their surroundings e) only by glowing objects such as the sun

by any object not at 0 K

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

conduction

a typical thermos bottle has a thin vacuum space between the shiny inner flask which holds a liquid and the shiny protective outer flask, often stainless steel. the vacuum space is excellent at preventing a) convection b) conduction and covection c) conduction d) conduction, convection, and radiation e) radiation

conduction and convection

by which primary heat transfer mechanism does a stove top heat a pot of soup? a) convection b) conduction c) radiation

convection

for all objects at thermal equilibrium, which of the following is true? a) each has the same heat b) each is at the same temperature c) each has the same interval energy d) all of the above

each is at the same temperature

when you put an ice cube in a glass of warm tea, which of the following happens? a) cold flows from the ice cube into the tea b) cold flows from the ice cube into the tea and heat flows from the tea into the ice cube c) neither heat nor cold flows. only temperature flows between the ice and the tea d) heat flows from the tea into the ice cube

heat flows from the tea into the ice cube

which of the following happens when a material undergoes a phase change? a) the temperature changes b) the molecules break apart into atoms c) the chemical composition changes d) heat flows into or out of the material

heat flows into or out of the material

which temperature scale does NOT have negative values? a) fahrenheit b) kelvin c) celsius d) none of the above

kelvin

which of the following statements are true? a) liquid water expands with increasing temperature above 4 C b) water contracts as it freezes at 0 C c) solid ice is less dense than liquid water d) liquid water expands with increasing temperature between 0-4 C

liquid water expands with increasing temperature above 4 C, solid ice is less dense than liquid water

ten grams of water is added to ten grams of ice in an insulated container. will all of the ice melt? a) more information is needed b) yes c) no

more information is needed

by which primary heat transfer mechanism does the sun warm earth? a) convection b) conduction c) radiation

radiation

rod A is twice as thick as rod B but both are iron and the same length. both rods are subjected to the same change in temp. how would the change in the rod's length compare? a) rod A > rod B b) rod B > rod A c) rod A = rod B d) need to know if they were cooled or headed

rod A = rod B

which of the following does the internal energy of an ideal gas depend on? a) volume b) pressure c) temperature d) all of the above

temperature

heat is a) measure of the average kinetic energy of atoms b) fluid called caloric c) invisible, odorless, weightless substance d) the total kinetic energy of an ideal gas e) the amount of energy transferred between objects as a result of a difference in temperature

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

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? a) the cooler one b) the hotter one c) both are the same

the cooler one

in a mixture of the gases oxygen and helium, which statement is valid? a) the helium atoms will be moving faster than the oxygen molecules, on avergage b) the kinetic energy of helium atoms will exceed that of oxygen molecules c) both will be moving at the same speed d) 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

a steel plate has a hole with a 1.0 cm diameter at 20 C. a steel ring has a diameter of 1.0 cm at 20 C. both are heated to 100 C, which statement is true? a) the hole in the plate gets smaller, and the opening in the ring gets larger b) the hole in the plate and the opening in the ring get smaller c) the hole in the plate and the opening in the ring get larger d) the hole in the plate gets larger, and the opening in the ring gets smaller

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

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 greatest temperature change? a) the one with the lesser mass b) the one with the lower initial temperature c) the one with the greater mass d) the one with the higher specific heat e) the one with the higher initial temperature

the one with the lesser mass

which of the following is true? a) the pressure must decrease b) the pressure must increase while the volume decreases c) the volume mus increase while the pressure decreases d) the pressure, the volume, or both may increase

the pressure, the volume, or both may increase

an ideal gas is in a sealed rigid container. the average kinetic energy of the gas molecules depends most on a) the mass of the molecules b) the number of molecules in the container c) the temperature of the gas d) the size of the container

the temperature of the gas

beaker A contains two cubes of ice in water at equilibrium. beaker B contains 14 cubes of ice in water at equilibrium. which beaker is the coldest? a) beaker A b) beaker B c) they are equal

they are equal

as heat is added to water, is it possible for the temperature measured by a thermometer in the water to remain constant? a) maybe; it depends on the initial water temperature b) maybe; it depends on the rate at which the heat is added c) no; adding heat will always change the temperature d) yes; the water could be changing phase

yes; the water could be changing phase