Answer:
D) No, since kinetic energy is not conserved.
Explanation:
Since momentum is always conserved in all collision
so in Y direction we can say
Now similarly in X direction we will have
now final kinetic energy of both puck after collision is given as
initial kinetic energy of both pucks is given as
since KE is decreased here so it must be inelastic collision
D) No, since kinetic energy is not conserved.
Answer:
It would gain weight
Explanation:
As water only releasing O2 molecules, but intake CO2 and H2O, the combination of molecular mass of CO2 and H2O must be larger than O2 itself. So the overall result is the tree gaining weight at a faster rate that losing weight. Therefore, it would gain more weight as it respires.
The work done by a system on a different body is equal to the product of the force exerted and the distance that the body has move in parallel to the force exerted. In this item, we have to determine first the distance and multiply it with the given force equal to 750N.
Dependant variable is something which you MEASURE during an experiment
So your answer would be : B
We want to know the amount of force that stretches the spring 0.22 m.
That force is the WEIGHT of the mass hung from it.
The weight of the mass is (mass) times (gravity).
To do that calculation, we need to know the value of gravity, but
gravity has different values on every planet. I shall assume that
this whole springy question is taking place on Earth, so that the
value of gravity is 9.8 m/s² .
The weight of the mass is (0.4 kg) x (9.8 m/s²) = 3.92 Newtons.
The spring constant is
(force/length of the stretch)
= (3.92 Newtons) / (0.22 meters)
= (3.92 / 0.22) Newtons/meter
= 17.82 N/m .
