The answer is C) Sodium.
~Deceptiøn
Answer:
bird's speed = 4.58 m/s
Explanation:
given data
mass of bird mb = 300 g
velocity of bird vb = 5.7 m/s
mass of insect mi = 10 g
velocity of insect vi = - 29 m/s
solution
here momentum of system is constant
we apply here conservation of momentum so
mb × v + mi × v = mb × vb + mi × vi ....................1
v ( mb + mi ) = mb × vb + mi × vi
put here value and we get
v ( 300 + 10 ) = { 300 × 5.7 } + { 10 × (-29) }
v =
v = 4.58 m/s
<u>Answer</u>
The acceleration is
to the nearest tenth
<u>Explanation</u>
Since the car was travelling at
before it starts to decelerate, the initial velocity is
.
The final velocity is
, because the car came to a stop.
The time taken is
.
Using the Newton's equation of linear motion,
, we find the acceleration by substituting the known values.
This implies that,

This gives us,


We divide both sides by 15 to get,

or
