Technician a says the charging system recharges the battery by supplying a constant and relatively low charge to the battery. technician b says the charging system works on the principles of magnetism to change mechanical energy into electrical energy. who is correct

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 .

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards