Answer:
3/4 filled with water
Explanation:
x = Fraction of box filled
g = Acceleration due to gravity = 9.81 m/s²
= Density of water
V = Volume of water
Weight of empty box is equal to the weight of the water displaced

As all the forces are conserved

So, the box starts to sink when the box is 3/4 filled with water
We have that the <em>statements</em> found falsifiable is
Henry Ford invented the first automobile.
Option A
<h3>Henry Ford</h3><h3 />
Generally in as much Ford motor is a great vehicle company
He did not create the first automobile
Credit is give to Karl Benz for The first auto-mobile
Therefore
The statements found falsifiable is
Henry Ford invented the first automobile.
Option A
For more information on Benz visit
brainly.com/question/19424882
Answer: The frequency heard will be f = 275.675Hz
Explanation: When an object emitting sound is moving, it occurs a phenomenon called Doppler shift or Doppler effect. What happens is that the sound gets higher when the moving object comes closer the observer and becomes lower after it passes, This change is due to the quantity of waves that passes through an area in an unit of time.
The formula to calculate the Doppler effect is as follows
f = (
) · f₀
f is the observed frequency;
c is the speed of sound;
Vs is velocity of the source;
f₀ is the emitted frequency of source;
Substituting and calculating,
f =
· 300
f = 275.675 Hz
Thus, the frequency heard by the police officer is 275.675Hz.
Answer:
Explanation:
Given
initial velocity 
At maximum height velocity of ball is zero
using

where v=final velocity
u=initial velocity
a=acceleration
s=displacement



time taken by the ball to reach the maximum height




At
height of ball is




i.e. ball is moving downward
height at 

