Physical Properties of Hydrogen Sulphide (H2S)
Physical Properties of Hydrogen Sulphide (H2S)
Describe an Electric lamp
An electric lamp is one of the devices that work by exploiting the thermal effect of electric current. A sealed glass bulb consists of two thick wires. A narrow and long coil of tungsten wire is attached to both ends of it. This coil of wire is called the filament. The bulb is evacuated or
Can sound travel in a vacuum? Experiment to support the statement.
A vibration that travels through the material world around us is known as sound. Before reaching our ears, these vibrations generate sound waves that travel across mediums like air and water. Can sound travel in a vacuum? This question is explained below. Can sound travel in a vacuum? Sound cannot pass through an empty medium.
Can sound travel in a vacuum? Experiment to support the statement. Read More »
If the same current is sent through a thick and a thin copper wire of equal length for the same time, which wire will heat up more?
Between a thin and a thick copper wire of equal length, the resistance of the thin wire is higher. As we know, the heat generated in a conductor is proportional to the resistance of the conductor if the flow rate and flow time are constant. So, since the same current is being sent through both
Why do we hear louder sounds in a hall?
Why do we hear louder sounds in a hall? Answer: Loud noises in the hall are reflected repeatedly from the walls, floor and ceiling of the room, resulting in reverberation.
What happens if a bell rings which is kept in a vacuum?
What happens if a bell rings which is kept in a vacuum? Answer: If bells are rung in airless containers, they cannot be heard. Because the spread of the sound requires a physical medium. Even if the bell is ringing, the sound produced cannot propagate due to the absence of a medium as the vessel
What happens if a bell rings which is kept in a vacuum? Read More »
Why does sawing in wood produce two different sounds?
Why does sawing in wood produce a coarse sound when sawing slowly and a sharp sound when sawing quickly? Answer: When sawing through wood, a coarser sound is heard if the saw is moved slowly because the frequency is lower. But if the saw is run quickly i.e. fast, the frequency increases and the sharp
Why does sawing in wood produce two different sounds? Read More »
Why is the sound produced at one end of a hollow iron pipe heard twice at the other end?
Why is the sound produced at one end of a hollow iron pipe heard twice at the other end? Answer: The sound produced by striking one end of a hollow iron pipe with a hammer travels through the iron of the pipe and through the air inside the pipe. The speed of sound is different
Why is the sound produced at one end of a hollow iron pipe heard twice at the other end? Read More »
Why cannot a sound be heard on the moon?
Why cannot a sound be heard on the moon? Answer: While standing side by side on the lunar surface, radio assistance is required. Moon has no atmosphere. Since sound needs a physical medium for propagation, no sound can be heard even if you stand side by side on the moon. Hence, the help of radio
Why does the sound of explosions on the Sun or Moon not reach the Earth?
Why does the sound of explosions on the Sun or Moon not reach the Earth? Answer: The sound produced by an explosion on the Sun or the Moon cannot be heard on Earth. Sound propagation requires a physical medium. Sound cannot pass through a vacuum. Most spaces are zero for the distance between the Sun
Why does the sound of explosions on the Sun or Moon not reach the Earth? Read More »