Always use significant figure rules. remember that these rules apply to all numbers that are measurements. in working this problem, assume the value of "g" to be 9.8 m/s2 with two (2) significant digits unless otherwise stated.

calculate the total energy of 2.0 kg object moving horizontally at 10 m/s 50 meters above the surface.

a.10. j
b.100 j
c.200 j
d.1080 j

Answer : The correct option is, (d) 1080 J

Explanation :

Total energy = Kinetic energy + Potential energy

where,

m = mass of an object = 2.0 kg

v = speed of an object = 10 m/s

h = height of an object = 50 m

g = acceleration due to gravity =

Now put all the given values in the above expression, we get:

Total energy = 1080 J

Thus, the total energy will be, 1080 J

i would think it's food chain

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 .