(D) The gravitational force between the astronaut and the asteroid.
Reason :
All the other forces given in the options, except (D), doesn't account for the motion of the astronaut. They are the forces that act between nucleons or atoms and neither of them accounts for an objects motion.
I would say that you're describing an impossible situation.
If the object is stationary, then it has no movement.
If the object has movement, then it's not stationary.
Answer: v= 330m/s
Explanation: the length (l) of an open closed pipe is related to the wavelength (λ) as shown in the formulae below
l = λ/4
where l = 0.55m, hence we have that
0.55 = λ/4
λ = 0.55*4
λ = 2.2m
from the question, it can be seen that the fundamental frequency is 150Hz.
Recall that we have v=fλ, where v = speed of wave, f= frequency, λ= wavelength
v =2.2 * 150
v = 330 m/s
Answer:
4360 Kgm/s
Explanation:
Applying,
Ft = M-M'................. Equation 1
Where F = force, t = time, M = Final momentum, M' = Initial momentum.
make M the subject of the equation
M = Ft+M'............ Equation 2
From the question,
Given: F = 4000 N, t = 0.9 seconds, M' = 400 kg-m/s
Substitute these values into equation 2
M = 4000+(0.9×400)
M = 4000+360
M = 4360 kgm/s
Hence the final momentum is 4360 kgm/s
The period of the pendulum doesn't determine the length of the string.
It's the other way around.
The period of the pendulum is proportional to the square root of its length.
So if you want to triple the period, you have to make the string nine times
as long as it is now.
