Answer:
1.75g
Explanation:
Given parameters:
Density = 3.5g/cm³
Volume = 0.5cm³
Unknown:
Mass of the diamond = ?
Solution:
Density is the mass per unit volume of a substance
Density =
So;
Mass = 3.5 x 0.5 = 1.75g
A plant box falls from the windowsill 25.0 m above the sidewalk and hits the cement 3.0 s later. What is the box's velocity when
1 answer:
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The final velocity of the tool is 107.4 m/s
Explanation:
We can solve this problem by using the principle of conservation of energy.
In fact, if air resistance is negligible, the total mechanical energy of the tool is conserved during the fall, so we can write:
where
is the kinetic energy of the tool at the top (zero since it is at rest)
is the gravitational potential energy of the tool at the top, where
m is the mass of the tool
g is the acceleration of gravity
h is the heigth of the tool
is the kinetic energy of the tool just before hitting the ground, where
v is the final speed of the tool
is the gravitational potential energy of the tool at the bottom (zero since the height is zero)
Re-arranging the equation,
where we have
And solving for v,
Learn more about kinetic energy and potential energy:
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