What is the density of a small block of wood with a mass of 35g and a volume of 70 cm3 Help plz

The density of the wood is 0.5 g/cm³

Explanation:

To calculate density you need to use the formula D = M/V

D = Density

M = Mass (in grams)

V = Volume (in cm³ for solids and mL for liquids)

So, just plug in your given values: D = 35 g ÷ 70 cm³ = 0.5 g/cm³

Voila, you just calculated the density of that piece of wood!

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.