The answer is false..................
Answer:
Explanation:
So he can get most momentum when he takes that fish.
<span>Answer:
Sodium gives off a yellow flame. The sodium yeloow flame can obscure the faint lilac flame of potassium. So what you do is perform the test again, holding a square of cobalt glass to your eye to observe the flame. The cobalt glass screens out the intense sodium yellow, and you see the lilac flame of potassium loud and clear.</span>
The radius of the sphere is r=5.15 cm=0.0515 m, and its surface is given by
So the total charge on the surface of the sphere is, using the charge density
:
The electrostatic force between the sphere and the point charge is:
where
ke is the Coulomb's constant
Q is the charge on the sphere
is the point charge
r is their separation
Re-arranging the equation, we can find the separation between the sphere and the point charge:
Answer:
Explanation:
given,
mass of boy(m₁) = 40 kg
mass of the skateboard(m₂) = 2.50 kg
velocity of skateboard(V) = 5.30 m/s
speed of the boy(v₁) = 6 m/s at 9.50° above the horizontal
friction force is not acting in x-direction hence no we can apply conservation of momentum in x- direction
as the boy jumps over sidewalk skateboard cannot go through the sidewalk, there must be some force in the y direction so, momentum is not conserved.
negative sign represent velocity of the skateboard is in the opposite direction of boy.