Answer:
The distance between the submarine is, d = 9933.3 m
Explanation:
Given data,
The speed of the submarine A and B, v = 5 m/s
Submarine A produces a pulse of sound to detect B at a distance, d = 10 km
= 10000 m
The speed of sound in water is, V = 1500 m/s
The time period to receive echo is given by the formula,
t = d / v
= 10000 / 1500
= 6.67 s
The distance between the submarine is given by the relation
d = 10000 - 2(v x t)
= 10000 - 2(5 x 6.67)
= 9933.3 m
Hence, the distance between the submarine is, d = 9933.3 m
Answer:
(a) 1.73 s
(b) 14.75 m
(c) 3.36 s
(d) double
(e) 63.32 m
Explanation:
Vertical component of initial velocity, uy = 17 m/s
Horizontal component of initial velocity, ux = 18.3 m/s
(A) At highest point of trajectory, the vertical component of velocity is zero. Let the time taken is t.
Use first equation of motion in vertical direction
vy = uy - gt
0 = 17 - 9.8 t
t = 1.73 seconds
(B) Let the highest point is at height h.
Use III equation of motion in vertical direction
0 = 17 x 17 - 2 x 9.8 x h
h = 14.75 m
(C) The time taken by the ball to return to original level is T.
Use second equation of motion i vertical direction.
h = 0 , u = 17 m/s
0 = 17 t - 0.5 x 9.8 t^2
t = 3.46 second
(D) It is the double of time calculated in part A
(E) Horizontal distance = horizontal velocity x total time
d = 18.3 x 3.46 = 63.32 m
Answer:
I think the answer would be D.
Explanation:
It could be b or d, the reason that I think that it is d is because lifting does not directly involve your wrist.
Hope this helps!
According to the information in the fragment, it can be inferred that it is an example of how scientific development has consequences on pre-established theories and new areas are created in science (option C)
<h3>What is a scientific theory?</h3>
A scientific theory is a term to refer to a set of concepts and observations that are proposed as principles to explain a class of phenomena.
According to the above, the discovery of germs and their relationship with human diseases was an event that changed scientific theories about human diseases because it demonstrated a different explanation than what was believed up to that time.
So, the correct answer is option C because this event changed scientific theory and opened new fields for scientific study and research.
Learn more about sciences in: brainly.com/question/12265124
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