Answer:
Volume of the wood = 120.615 cm3
Density of the wood = 0.457 g/cm3
Explanation:
By definition, density is the mass of a substance per unit volume and its units are kg/m3, g/l etc.
Volume of a cuboid = length * breadth * height
Length = 8.5 cm
Breadth = 3.3 cm
Height = 4.3 cm
Volume of the wood = 8.5 * 3.3 * 4.3
= 120.615 cm3
Mass of the wood = 55.120 g
Density = mass/volume
= 55.120/120.615
= 0.457 g/cm3
= 457 kg/m3
(a). By the inertia, it's difficult to stop heavier mass than lighter mass.
As, moment of inertia is directly proportional to the mass of the body.
Thus, more force is required to stop the boy with heavier mass than lighter mass.
The problem statement for the given case is,
The time taken by the heavier body to stop swinging is more than the lighter body, then what is the impact of weight on the time period of the swing?
Answer:
B. interactive
Explanation:
newtons first law is inertia his second is acceleration and third is interactive.
Answer:
Explanation:
capacitance of sphere 2 will be 4.5 times sphere 1
a ) when spheres are in contact they will have same potential finally . So
V_1 / V_2 = 1
b )
Charge will be distributed in the ratio of their capacity
charge on sphere1 = q x 1 / ( 1 + 4.5 )
= q / 5.5
fraction = 1 / 5.5
c ) charge on sphere 2
= q x 4.5 / 5.5
fraction = 4.5 / 5.5
d ) surface charge density of sphere 1
= q /( 5.5 x A ) where A is surface area
surface charge density of sphere 2
= q x 4.5 /( 5.5 x 4.5² A ) where A is surface area
= q /( 5.5 x 4.5 A )
q_1/q_2 = 4.5