I believe the givens should be written in this manner,
(4.2 x 10⁵)(4.0 x 10⁻⁹)
To answer, we first multiply the bases 4.2 and 4 which will give us,
16.8
Then, we multiply the multipliers by adding up the exponents of 10. This will give us the answer of,
16.8 x 10⁻⁴
Then, the final answer would be 1.68 x 10⁻³.
Answer:
a magnet and sifter
Explanation:
a magnet will get all the iron filling and the sifter will separate the powder and sand
675g/cm³ is the density of the liquid
Here we have given that
density of wood be ρ.
the volume of the block be V
The volume of the block =1/4 v
The volume of the immersed block (v) =V-1/4V=3/4V
We know the weight of the block = the weight of the water displaced by the submerged part of the block.
i.e. V x ρ x g
= 3/4 x900g/cm³
= 675g/cm³
Density is a measure of mass divided by the volume of an object. Defined as mass per unit volume. here from the above equation we have substituted the given value and we got the answer as 675g/cm³
Learn more about Density here brainly.com/question/1354972
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If the planet's radius is 5378, then the distance around its equator is
(2π) x (5378) = 33,790.97 .
Any point on the equator takes 24 hours to go all the way around once, so its linear speed is
(33,790.97) / (24)
<em>Speed = 1,407.96 units/hour</em>
Speed = 23.466 units/minute
Speed = 0.391 unit/second
The 'unit' is the same as whatever unit the '5378' has.