Answer:
5.72 seconds
848.27 m/s
97.94 m
Explanation:
t = Time taken
u = Initial velocity = 15 m/s
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.81 m/s²

Time taken to reach maximum height is 0.97 seconds

So, the stone would travel 11.47 m up
So, total height stone would fall is 75+11.47 = 86.47 m
Total distance travelled by the stone would be 75+11.47+11.47 = 97.94 m

Time taken by the stone to travel 86.47 m to the water is is 4.2 seconds
The stone reaches the water after 4.2+1.52 = 5.72 seconds after throwing the stone

Speed just before hitting the water is 848.27 m/s
Answer:
a) 
b) T = 720.85N
Explanation:
With a balance of energy from the lowest point to its maximum height:

Solving for
:


Centripetal acceleration is:



To calculate the tension of the rope, we make a sum of forces:

Solving for T:

T = 720.85N
Answer:
× 
Explanation:
Knowing that, the volume of the sphere is given by, 
Thus, the fractional change in volume is given by,
× 
Pressure at the bottom of the sea is,
Δp =pgh =
×
×
pa.
Knowing that,
Bulk modulus: 


Answer =
× 
[RevyBreeze]
Answer:
256 ×a0
Explanation:
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View the explanation from attachment 3 followed by 2 and then 1
Answer:


Explanation:
N = Near point of eye = 25 cm
= Focal length of objective = 0.8 cm
= Focal length of eyepiece = 1.8 cm
l = Distance between the lenses = 16 cm
Object distance is given by

= Object distance for objective
From lens equation we have

The position of the object is
.
Magnification of eyepiece is

Magnification of objective is

Total magnification is given by

The total magnification is
.