Answer: 
Explanation:
The frequency 
of a wave is given by the following equation:
Where:
is the period
Hence:
Answer:
Explanation:
A block is moving with constant velocity action the action of 3 N force.
Statement A: False, as the block is moving with constant velocity so net force is zero.
Statement B: False, as the net force is zero.
Statement C: True, the friction force is equal to the applied force.
Statement D: True: The net force is zero so that the block is moving with constant velocity.
Statement E: True, the net force is zero so the acceleration is also zero.
From the information given, the mass of the moving body, which in this case is a person, is 72 kg and the momentum 700 kg m/s.
we use the formula p = m × v.
Where p is momentum, m is the mass and v is the velocity.
We need v so we rewrite the equation thus: v = p/m
In our case p = 700 and m = 72
v = p/m → v = 700/ 72 → v = 9.72
Therefore the person is travelling at 9.72 m/s
Answer:
(a): The bird speed after swallowing the insect is V= 4.83 m/s
(b): The impulse on the bird is I= 0.3 kg m/s
(c): The force between the bird and the insect is F= 20 N
Explanation:
ma= 0.3 kg
va= 6 m/s
mb= 0.01kg
vb= 30 m/s
(ma*va - mb*vb) / (ma+mb) = V
V= 4.83 m/s (a)
I= mb * vb
I= 0.3 kg m/s (b)
F*t= I
F= I/t
F= 20 N (c)
