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Volume
The buoyancy is 450-310 g = 140g
So the body displaces the volume of that 140g of water.
Which is 140 cm^3
because water weighs 1 g per 1 cm^3
Rectilinear Figures
Solution:-
For drawing a parrallelogram we can find out the length of the base of the perpendicular from the vertex B of the parallelogram.
In triangle AOB
AO^{2} + BO^{2} = AB^{2}
BO^{2} = (4.5)^{2} - (3.5)^{2}
BO^{2} = 8
BO = 2.83 cm
Digestive System
Altogether, about 5% of starch digestion happens in the mouth. However, it will vary a bit depending on how long you chew, how much moisture there is in the mouth, and how much moisture the starch can absorb.
Retradation
Retardation is negative acceleration and defined as rate of decreasing of velocity of an object. It’s SI unit is m/s².
Mid - Point Theorems
The Language of Chemistry
Indices
(x+y+z) / (x^(-1) y^(-1) + y^(-1) z^(-1) + z^(-1) x^(-1) )�
= (x+y+z) / (1/xy + 1/yz + 1/xz )�
= (x + y + z)/{(x + y + z)/(xyz)}
= xyz
Newton's Law Of Motion
A cyclist riding along a level road does not come to rest immediately after he stops pedaling.�Because�the bicycle continues to move due to inertia of motion even after the cyclist stops pedaling i.e., applying the force. But it comes to rest afterwards as a result of the retarding force of friction between the tyres of bicycle and the ground.
Newton's Laws Of Motion
DOWNWARD MOTION:
FInd the final velocity just before touching the ground.
v1 = - sqrt(2gh1) where h1 = 40m
v1 = -28 m/s (take care of negative sign)
UPWARD MOTION:
FInd the initial velocity:
u1 = sqrt(2gh)
u1 = 14m/s
Therefoe, J = m(u1-v1) = 0.75(14 - (-28)) = 31.5
Note: Take care of sign
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