Janice measured the mass and the volume of an object. She then determined the density of the object by dividing the object's mass by its volume (D =
D=)
Which value would most likely represent the density of the object?
O-1 g/cm
O 4 m/s
0-3 m/s
O 6 g/cm

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.