Suppose a scientist found a new matal-like substance in the desert. he determined its mass to be 20 grams. the volume was determined by water displacement to be 5 cm^3. what is the density of the substance? will it sink or float in liquid water ( 1g/cm^3)?

Density = (mass) / (volume)

Density = (20 g) / (5 cm³)

Density = 4 g/cm³ .

The density of the substance is greater than the density of water. A lump of the substance will sink in water, unless the lump is formed into a shape that displaces 20 cm³ of water or more, such as a tiny boat shape.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles