When object density is lesser than liquid density, it floats....BUT when it's density is greater than the liquid density, then it sinks...
Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists describe as elliptical. It is one of Kepler's laws. The sun is the focus of all the planets. The correct answer is D.
Full Question:
Why do we use other bonding theories in addition to the lewis model?
a) Lewis model is not suitable for all molecules or ions. b) Lewis model cannot predict all of the properties of a molecule or ion. c) Lewis model is too complicated.
Answer:
b) Lewis model cannot predict all of the properties of a molecule or ion.
Explanation:
Lewis structures, also called electron-dot structures or electron-dot diagrams, are diagrams that show the bonding between atoms of a molecule, and the lone pairs of electrons that may exist in the molecule.
Lweis model does not explain the geometry of molecules, how the bonds form, or how the electrons are shared between the atoms hence the need to use other bonding theories.
Answer:
v = 747.83 m/s
Explanation:
given,
mass of bullet, m = 10.7 g
= 0.0107 Kg
mass of the wooden plank, M = 4588 g = 4.588 Kg
speed of the block and the bullet together, V = 1.74 m/s
initial speed of the plank = 0 m/s
using conservation of momentum
m v + M u = ( M + m ) V
0.0107 x v + 0 = (4.588 + 0.0107) x 1.74
0.0107 v = 8
v = 747.83 m/s
now, speed of the bullet is equal to 747.83 m/s.
