# Reasons, whether the following characteristics of the washer increase, decrease, or remain the same when it is heated. (a) Internal diameter(b) Volume(c) Mass(d) Density(e) External diameter - Physics

Short Note

The following figure shows a copper washer. Explain, giving reasons, whether the following characteristics of the washer increase, decrease, or remain the same when it is heated.

(a) Internal diameter
(b) Volume
(c) Mass
(d) Density
(e) External diameter

#### Solution

On heating the copper washer
(a). Its internal diameter will increase as the copper washer expands outwards
(b). Volume will increase as the size of the metal expands on heating
(c). Mass will remain the same as the mass does not change with change in temperature
(d). Density will decrease as the volume of the washer increases on heating and density is inversely proportional to volume
(e). External diameter will increase because the copper washer expands outwards

Concept: Temperature
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#### APPEARS IN

Frank Class 9 Physics ICSE
Chapter 5 Heat
Thermal Expansion | Q 27 | Page 203