Motion is the change in an object’s position over time relative to a reference point.
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Non-standard units are informal measurements like hand spans or footsteps, lacking consistency and accuracy.
We can measure length using tools like rulers, measuring tapes, or meter rods, depending on the object’s size.
Standard units ensure consistency and accuracy in measurements, making communication and comparison easier.
We understand hot and cold by measuring the temperature of an object or substance. NCERT Book Curiosity Science Class 6 Chapter 1 The Wonderful World of Science NCERT Science Texbook Session 2024-2025.
The acceleration due to the Earth’s mass is much larger than the acceleration due to the apple’s mass, making the motion of the Earth practically imperceptible compared to the motion of the falling apple.
The true statement for sound waves is at 0 °C their speed is 332 meters per second. Sound waves cannot be polarized because they are longitudinal waves, and they cannot travel in a vacuum as they require a medium to ...
Sound waves are longitudinal waves. They consist of compressions and rarefactions that travel through a medium, such as air, water, or solids. Unlike transverse waves, which oscillate perpendicular to the direction of wave propagation, longitudinal waves oscillate parallel to the ...
Supersonic aircraft fly at speeds greater than the speed of sound, known as Mach 1. This speed varies depending on altitude and atmospheric conditions but is approximately 343 meters per second at sea level. These aircraft can travel faster than ...
The velocity of sound in air increases with increasing temperature. This is because warmer air has more energy, causing air molecules to move faster and transmit sound waves more quickly.