The wind speed is 20
the plane is 430mph in still air
D) Sound waves carry energy parallel to the motion of the wave, while light waves carry energy perpendicular to it.
Answer:
The tension in the rope is 20 N
Solution:
As per the question:
Mass of the object, M = 2 kg
Density of water,
Density of the object,
Acceleration due to gravity, g =
Now,
From the fig.1:
'N' represents the Bouyant force and T represents tension in the rope.
Suppose, the volume of the block be V:
V = (1)
Also, we know that Bouyant force is given by:
Using eqn (1):
From the fig.1:
N = Mg + T
40 = 2(10) + T
T = 40 - 20 = 20 N
The block is ACCELERATING to the left, but there's not enough information to tell which direction it's moving.