Answer:
30.4 s
Explanation:
A pilot , with plane accelerated at 4 g starts greying out . In the problem , the acceleration of jet is 4 g
a = 4 x 9.8 = 39.2 m /s²
initial velocity u = 0
Final velocity = 3.60 times speed of sound
= 3.6 x 331 = 1191.6 m /s
v = u + at
Putting the values
1191.6 = 0 + 39.2 t
t = 30.4 s .
Answer:
the bunch of 23 electrons must be placed on y axis at coordinate y = - 24.35 m.
Explanation:
As we know that the gravitational force on electron at y = 0 is counter-balanced by the weight of the electron
So we have
here we have
also we know that
so we will have
so the bunch of 23 electrons must be placed on y axis at coordinate y = - 24.35 m.
Answer:
An AC circuit
Explanation:
In Alternate current, current reverses many times periodically.
The mass slows to a rest from an initial speed of 10.0 m/s in a matter of 1.50 s. If we assume constant acceleration, then the mass has acceleration a such that
0 = 10.0 m/s + a (1.50 s) ⇒ a ≈ -(10.0 m/s)/(1.50 s)
The net force acting on the mass as it slows down is
∑ F[horizontal] = -F[friction] = ma
where m = 15.0 kg, and we take the direction in which friction is acting to be negative. Then
-F[friction] = -(15.0 kg) (10.0 m/s)/(1.50 s) ⇒ F[friction] = 100 N
4 m/s is the correct answer, it's just simple subtraction. :)
Hope this helps.