Answer:
C. 8I.
Explanation:
As moment of inertia for a bar is proportional to the product of its mass and the square of its length, doubling the mass will double the moment of inertia. Doubling the length will quadruple the moment of inertia. Doing both will make the moment of inertia 2(4) = 8 times larger
Answer: B) exactly the same as the initial momentum.
Explanation:
An inelastic collision occurs when the elements that collide remain together after the collision, and althogh the kinetic energy is not conserved because is transformed into other kinds of energy (thermal energy, for example), the linear momentum does.
This means the initial momentum before the collision will be equal to the final momentum after the collision:
The first option is true, water vapor helps keep the Earth's heat from escaping into space.
Answer:
F = 2 [N], choose option (2)
Explanation:
The principle of impulse is defined by the following expression:
Impulse = Force * Time
Force = force acting [N] or [kg*m/s^s]
Time = time during the impulse [s]
Replacing:
Impulse = 10[kg*m/s^2] * 10 [s]
Impulse = 0,1 [kg*m/s]
Now with this impulse, we can find the force for the new time.
F = Impulse/Time
F = 0.1[kg*m/s] / 0.05[s]
F = 2 [N]