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2 years ago

The chimney of an oil lamp cracks when touched with rhe brade of cold knife?why

Physics

2 answers:

Bezzdna [24]2 years ago

7 0

Answer:

The extreme difference between the hot chimney and the cold knife makes the chimney expand and contract so quickly it cracks.

Explanation:

Hope this helped!

Fiesta28 [93]2 years ago

6 0

Answer:

When a blade of cold knife is touched to hot glass chimney there is a sudden drop of temperature on the spot where the blade touches. As a result it cracks.

Explanation:

When a blade of cold knife is touched to hot glass chimney there is a sudden drop of temperature on the spot where the blade touches. This decrease in temperature makes the glass to contract. The stress developed on the site of contraction is responsible for the cracking of the glass chimney.

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CaHeK987 [17]

The density of sample is 5 g/cm3

Given:

volume of sample = 20 cm3

mass of sample = 100 grams

To Find:

density of sample

Solution: Density is the measure of how much “stuff” is in a given amount of space. For example, a block of the heavier element lead (Pb) will be denser than the softer, lighter element gold (Au). A block of Styrofoam is less dense than a brick. It is defined as mass per unit volume

density = mass/volume

d = 100/20

d = 5 g/cm3

So, density of sample is 5 g/cm3

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1 year ago

An iron nail is driven into a block of ice by a single blow of a hammer. The hammerhead has a mass of 0.5 kg and an initial spee

larisa [96]

Answer:

The ice melts mass is:

$m_g=7.6x10^{-3} g$

Explanation:

Kinetic Energy

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$K_E=2.56 kg*m^2/s^2$

Heat gained by ice= mass(g) x 80 cal

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2 years ago

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(D) The gravitational force between the astronaut and the asteroid.

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2 years ago

A punted football hits the ground with a force of 50 N . According to Newton’s 3rd law of motion what also happens at the same e

Nadya [2.5K]

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3 years ago

The chimney of an oil lamp cracks when touched with rhe brade of cold knife?why​

The chimney of an oil lamp cracks when touched with rhe brade of cold knife?why