Physics 15....

During a very cold winter, water pipes sometimes burst due to:

Water expanding when freezing

When most substances are heated, molecules inside move faster and take up more space, resulting in thermal

expansion

When you touch a hot potato with your finger, energy flows

from the potato to your finger.

When you touch a cold piece of ice with your finger, energy flows

from your finger to the ice.

Compared to a giant iceberg, a hot cup of coffee hasA) more internal energy and higher temperature.

higher temperature, but less internal energy.

Temperature is most closely related to molecular:

kinetic energy

Which temperature is hotter: 20C or 58F?

20ºC × 1.8+ 32 = 68ºF.... 20C is hotter

The temperature at the bottom of Lake Tahoe, high in the Sierra Nevada Mountains at this moment is:

4 degrees C

The amount of heat needed to raise the temperature of 1 gram of water by 1°C is

4.19 joules.

Which unit represents the most energy?

Calorie (BIG C NOT LITTLE c)

Which temperature scales have equal sized degrees?

Celsius and Kelvin

It is important that the two metals that compose a bimetallic strip have

Different rates of expansion

Which temperature scale has the smallest sized degrees?

Fahrenheit

A substance that heats up relatively quickly has a

High specific heat capacity

Aluminum has a higher specific heat capacity than iron. This means that for equal masses of aluminum and iron, the metal that heats more quickly when the same amount of heat is applied is

Iron

A temperature difference of 10 Celsius degrees is also equal to a temperature difference of 10 on the:

Kelvin scale.

A substance that cools down faster than others has a

Low specific heat capacity

In a glass of water at room temperature, do all the molecules have the same speed? Explain in detail!

NO... Speed of the water in the glass depends on the temperature of the molecules

Ice tends to form first at the

Surface of bodies of water

T/F: A piece of ice floats in water

True

Pour a liter of water at 40°C into a liter of water at 20°C and the final temperature of the two becomes

at or about 30°C.