Arwan finds a piece of quartz while hiking in the mountains. When he returns to school, he takes it to his science teacher. She
2 answers:
Answer: The volume of Arwan’s piece of quartz is
Explanation:
Mass of the Quartz piece brought by Arwan : 788.9 g
Density of the quartz =
Density of the substance is defined as mass present in per unit volume of the substance. It is measured in gram per centimeter cube.
Hence,the volume of Arwan’s piece of quartz is
You might be interested in
The elastic potential energy (Ep) is given by 
Data:
Ep = 5184 J
k = 16200 N/m
x (displacement) = ?
Solving:
Data:
Ep = 5184 J
k = 16200 N/m
x (displacement) = ?
Solving:
(a)
The total mechanical energy of the space probe must be constant, so we can write:
(1)
where
is the kinetic energy at the surface, when the probe is launched
is the gravitational potential energy at the surface
is the final kinetic energy of the probe
is the final gravitational potential energy
Here we have
at the surface, (radius of the planet),
(mass of the planet) and m=10 kg (mass of the probe), so the initial gravitational potential energy is
At the final point, the distance of the probe from the centre of Zero is
so the final potential energy is
So now we can use eq.(1) to find the final kinetic energy:
(b)
The probe reaches a maximum distance of
which means that at that point, the kinetic energy is zero: (the probe speed has become zero):
At that point, the gravitational potential energy is
So now we can use eq.(1) to find the initial kinetic energy: