Answer: 0.204 s
Explanation:
The speed of sound 
is defined as the distance traveled 
in a especific time 
:
Where:
is the speed of sound in seawater
is the time the sound wave travels from the dolphin and then returns after the reflection
is twice the distance between the dolphin and the object to which the sound waves are reflected
Finding :
<u>Finally:</u>
72s for 24 complete oscillations.
Thus, a complete oscillation takes 72/24=3s
Answer: period T=3s
Answer:
a) 2.5 m/s. (In the opposite direction to the direction in which she threw the boot).
b) The centre of mass is still at the starting point for both bodies.
c) It'll take Sally 12 s to reach the shore which is 30 m from her starting point.
Explanation:
Linear momentum is conserved.
(mass of boot) × (velocity of boot) + (mass of sally) × (velocity of Sally) = 0
5×30 + 60 × v = 0
v = (-150/60) = -2.5 m/s. (Minus inicates that motion is in the opposite direction to the direction in which she threw the boot).
b) At time t = 10 s,
Sally has travelled 25 m and the boot has travelled 300 m.
Taking the starting point for both bodies as the origin, and Sally's direction as the positive direction.
Centre of mass = [(60)(25) + (5)(-300)]/(60+5)
= 0 m.
The centre of mass is still at the starting point for both bodies.
c) The shore is 30 m away.
Speed = (Distance)/(time)
Time = (Distance)/(speed) = (30/2.5)
Time = 12 s
Hope this Helps!!!
Answer:
Number of electrons, 
Explanation:
Given that,
Charge on the fly, 
Let n is the number of electrons lose to the surface it is walking across. It is case of quantization of electric charge. It is given by :
n = 387500000 electrons
or
So, there are 
electrons. Hence, this is the required solution.
Answer:
<h2>Center of gravity of the system of all masses is 105 cm from the left end of the rod</h2>
Explanation:
Let the position of Left end of the rod is our reference
So here we will have
so we will have
