1. A crane lifts 300.5 kg to a platform that is 1.9 m above the ground. How much work is done? (HINT: 1" convert the
mass (kg) into newtons (force), then solve for work.)

Work = 5595.31J

Explanation:

Mass = 300.5kg

Distance (h) = 1.9m

Acceleration due to gravity (g) = 9.8m/s²

Work done on an object is the product of the force applied over the distance the object is moved.

Work = force * distance

Force = mass * acceleration (a or g)

F = m* g

F = 300.5 * 9.8

F = 2944.9N

Workdone = force *distance

Work = 2944.9 * 1.9

Work = 5595.31J

The work done is 5595.31J

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.