A2.0 kg book is lying on a 0.75-m-high table. you pick it up and place it on a bookshelf 2.3 m above the floor. during this process,

The gravitational potential energy gained by the book is 30.4 J

Explanation:

The change in gravitational potential energy of an object is given by

where

m is the mass of the object

g is the acceleration of gravity

is the change in height of the object

For the book in this problem,

m = 2.0 kg

g = 9.8 m/s^2

Substituting into the equation, we find

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true