Density = (mass) / (volume)
4,000 kg/m³ = (mass) / (0.09 m³)
Multiply each side
by 0.09 m³ : (4,000 kg/m³) x (0.09 m³) = mass
mass = 360 kg .
Force of gravity = (mass) x (acceleration of gravity)
= (360 kg) x (9.8 m/s²)
= (360 x 9.8) kg-m/s²
= 3,528 newtons .
That's the force of gravity on this block, and it doesn't matter
what else is around it. It could be in a box on the shelf or at
the bottom of a swimming pool . . . it's weight is 3,528 newtons
(about 793.7 pounds).
Now, it won't seem that heavy when it's in the water, because
there's another force acting on it in the upward direction, against
gravity. That's the buoyant force due to the displaced water.
The block is displacing 0.09 m³ of water. Water has 1,000 kg of
mass in a m³, so the block displaces 90 kg of water. The weight
of that water is (90) x (9.8) = 882 newtons (about 198.4 pounds),
and that force tries to hold the block up, against gravity.
So while it's in the water, the block seems to weigh
(3,528 - 882) = 2,646 newtons (about 595.2 pounds) .
But again ... it's not correct to call that the "force of gravity acting
on the block in water". The force of gravity doesn't change, but
there's another force, working against gravity, in the water.
Answer:
Vdc=10V
Explanation:
in a closed loop consisting of a super charged capacitor and an inductor, the super charge capacitor acts as a supply when the loop is closed, at t=0, the emf stored in the capacitor is 10V (q/c); and at that same time Vl= voltage across the inductor or loop too would be 10V,
if the loop remains closed for a longer period, the inductor would absorb energy from the capacitor till it dissipates all charges with itself.
Directly proportional to volume, according to charles’s law
Yes it is true , lightning happens because of the release of static electricity
The age of earth is b) 4.5 million years old
It is believed that earth is 4.5 million years old.
The radiometric age dating of earth meteorite content specifies the earth to be 4.5 million years old.
The formation of Earth is believed to have started shortly after the meteorites and nutrient inclusions were formed. It is challenging to differentiate between the ages of Earth and the oldest rocks since the duration of this accretion process is yet uncertain, and estimates from various accretion theories range from a few million with about 100 million years.
The oldest rocks on Earth that are visible at the surface are groupings of minerals, making it difficult to determine their exact age.
Due to the chemical makeup of rock minerals, some elements are found but not others; yet, in sedimentary deposits radioactive isotopes, the radioactive decay process over path to a successful strange elements.
Learn more about Earth here, brainly.com/question/12041467
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