They signed the <em>Halibut</em> Treaty of 1937.
The famous equation . . . E = m c² . . . doesn't say anything about where the mass comes from.
The total conversion of 1 kg of ANY mass into energy yields
(1kg) · (c²) Joules of energy.
E = (1 kg) · (c²) = (1 kg) · (299,792,458 m/s)²
<em>E = 8.9876 x 10¹⁶ Joules</em>
To put this in easily understood terms, it's the amount of energy required to keep a 100-watt light bulb shining for 10,402,259,010 days.
(That's about 28.5 million years, at the current length of days and years.)
Gravity
The moon doesn't smash into the earth because the gravity from the earth keeps the moon in orbit around it.
That's exactly the definition of <em><u>zero</u></em> acceleration ... no change in speed or direction.
1) The buoyant force acting on an object immersed in a fluid is:
where
is the density of the fluid,
is the volume of displaced fluid, and
is the gravitational acceleration.
2) We must calculate the volume of displaced fluid. Since the titanium object is completely immersed in the fluid (air), this volume corresponds to the volume of 1 Kg of titanium, whose density is
. Using the relationship between density, volume and mass, we find
3) Now we can recall the formula written at step 1) and calculate the buoyant force. The air density is
, so we have
4) The weight of 1 Kg of titanium is instead:
So, the buoyant force is negligible compared to the weight.