D is the correct answer. Constructive Interference occurs when the crests of one wave overlaps with the crests of another wave. The reason it is called "constructive" is because one wave is adding energy to another wave. Hope this helps!
Mass is given by:
m = ρV
m = mass, ρ = density, V = volume
Given values:
ρ = 1.11kg/m³, V = 350m³
Plug in and solve for m:
m = 1.11(350)
m = 389kg
Answer:
D=1.54489 m
Explanation:
Given data
S=6.10 mm= 0.0061 m
To find
Depth of lake
Solution
To find the depth of lake first we need to find the initial time ball takes to hit the water.To get the value of time use below equation
So ball takes 0.035sec to hit the water
As we have found time Now we need to find the final velocity of ball when it enters the lake.So final velocity is given as
Since there are (4.50-0.035) seconds left for (ball) it to reach the bottom of the lake
So the depth of lake given as:
Explanation:
It is known that the relation between work and force is as follows.
w =
where, = angle between the applied force and direction of movement of the object which is zero in this case. As, cos (0) = 1.
Therefore, d =
(i) For w = 36 J, and F = 9 N then value of d will be as follows.
d =
=
= 4 m
(ii) For w = 36 J, and F = 12 N then value of d will be as follows.
d =
=
= 3 m
(iii) For w = 36 J, and F = 6 N then value of d will be as follows.
d =
=
= 6 m
(iv) For w = 36 J, and F = 18 N then value of d will be as follows.
d =
=
= 2 m
In the question it is already given that the football player is 80 kg.
Then the mass of the football player = 80 kg
Velocity at which the football player is running = 8 m/s
<span>Kinetic Energy = 0.5 • mass • square of velocity
Now we have to put the known data in this equation to find the actual velocity of the footballer.
</span> <span></span>So
Kinetic Energy of the footballer = 0.5 * 80 * (8 * 8)
= 0.5 * 80 * 64
= 2560
So the Kinetic energy of the footballer is 2560 joules