Density of solid copper is 8960 kg/metre cubed. Calculate the volume of 5000 kg of copper to two significant figures.

Explanation:

Density

It's a measure of the mass of an object or substance per unit volume. It can be calculated as:

Given the density of solid copper as , we will calculate the volume occupied by M=5000 Kg of copper solving the above equation for V:

Substituting:

Calculating:

Expressed to two significant figures:

1= 26.17

2= 1.17

3=30.86

4=5.86

just took the assigment on edge

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.