Answer:
Option C
100 J
Explanation:
Kinetic energy, KE is given by
where m is the mass and v is the velocity
Substituting 50 Kg for mass, m and 2 m/s for velocity v then we obtain

Therefore, the child's kinetic energy is equivalent to 100 J
At the bottom of the tank :
P = ρgH
P = (1000 kg/m³)(10 m/s²)(1 m)
P = 10000 N/m²
F = P • A
F = (10000 N/m²)(1 m²)
F = 10000 N
At the side of the tank :
Pav = ½ρgH
Pav = ½(1000 kg/m³)(10 m/s²)(1 m)
Pav = 5000 N/m²
F = P • A
F = (5000 N/m²)(1 m²)
F = 5000 N
Answer:
No photo or graph is there
Explanation:
Answer: The electron number density (the number of electrons per unit volume) in the wire is
.
Explanation:
Given: Current = 5.0 A
Area = 
Density = 2.7
, Molar mass = 27 g
The electron density is calculated as follows.

where,
= density
M = molar mass
= Avogadro's number
Substitute the values into above formula as follows.

Thus, we can conclude that the electron number density (the number of electrons per unit volume) in the wire is
.
Answer:
The distance the piece travel in horizontally axis is
L=3.55m
Explanation:





Now the angular velocity is the blade speed so:
assuming no air friction effects affect blade piece:
time for blade piece to fall to floor

Now is the same time the piece travel horizontally

blade piece travels HORIZONTALLY = (24.5)(0.397) = 9.73 m ANS