A mechanical wave such as sound needs a medium to travel through. This is why they say that in space, no one can hear you scream (because space is a vacuum and no medium exists). On the contrary, light can exist in wave or particle form. This is why we have the ability to see beyond the realms of the Earth.
Answer: Metal. There are six of them. inclined plane, the wedge, the screw, the lever, the wheel and axle, and the pulley.
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~Jarvis
Explanation:
Answer:
i dont know
Explanation:
cuz i dont know what it wrote its too blurry
The relative density of gold is 19.3 it means the ratio obtained by dividing the density of gold by water at temp of 4 degree celcius is 19.3
