A person cannot unscrew the lid of a pot of jam. He finds that the lid can be unscrewed after it has been held under hot, running water for a few seconds. Why is this?

5054_s05_qp_1

MCQ

2005

Paper 1, Variant 0

View

Which statement about the pressure in a column of liquid is correct?

5054_s08_qp_1

MCQ

2008

Paper 1, Variant 0

View

The diagram shows a manometer containing mercury that is sealed at one end. h vacuum What happens to the distance h when the manometer is taken to the top of a mountain?

5054_s14_qp_11

MCQ

2014

Paper 1, Variant 1

View

The diagram shows a manometer containing mercury that is sealed at one end. h vacuum What happens to the distance h when the manometer is taken to the top of a mountain?

5054_s14_qp_12

MCQ

2014

Paper 1, Variant 2

View

Two glass containers filled with different liquids are placed next to each other. Point P is a distance h below the surface of the liquid in one container. Point Q is a distance h below the surface of the liquid in the other container. P h Q h Why is the pressure at P different from the pressure at Q?

5054_s17_qp_12

MCQ

2017

Paper 1, Variant 2

View

shows a student sitting on a chair. shows the same student with his chair tilted backwards slightly. State and explain how the pressure of the chair on the floor differs in the two positions. The chair and student fall over if the chair is tilted backwards more than in . Explain why.

5054_s17_qp_21

THEORY

2017

Paper 2, Variant 1

View

The diagram shows a manometer containing mercury that is sealed at one end. h vacuum What happens to the distance h when the manometer is taken higher up a mountain?

5054_s19_qp_11

MCQ

2019

Paper 1, Variant 1

View

The diagram shows a manometer containing mercury that is sealed at one end. h vacuum What happens to the distance h when the manometer is taken higher up a mountain?

5054_s19_qp_12

MCQ

2019

Paper 1, Variant 2

View

The diagrams show a simple mercury barometer. Which diagram shows the distance to be measured to find atmospheric pressure?

5054_w06_qp_1

MCQ

2006

Paper 1, Variant 0

View

A long tube full of mercury is inverted in a small dish of mercury. Q R S P The mercury level in the tube falls, leaving a vacuum at the top. When the atmospheric pressure falls, which length decreases?

5054_w09_qp_1

MCQ

2009

Paper 1, Variant 0

View

---