A. to push each other away
Answer: The final velocity of both man and hokey puck will be 0.056 m/s.
Explanation: We are given 2 objects and are undergoing collision. The final velocity of both the objects is same. To calculate the final velocity, we will use the principle of conservation of momentum.
This principle states that when the objects that are colliding makes up a system, then the total momentum will remain constant if no external force is applied on it.
Sum of Initial momentum of two objects = Sum of Final momentum of the two objects
Mathematically,
...(1)
where,
are the mass, initial velocity and final velocity of the first object.
are the mass, initial velocity and final velocity of the second object.
Here, man and hockey puck are moving together after the collision, so their final velocities will be same.

Putting values in equation 1, we get:


The final velocity of man and hockey puck is 0.056 m/s.
Answer:
it gains 2 electrons
Explanation:
atoms want to be more stable, for oxygen it's number is 8, 2 less than the stable ring of 10. and hydrogen has a single electron, 1 less than the stable ring of 2. so oxygen takes 2 electrons 2 make it stable and hydrogen becomes attatched to the oxygen atom to form a covalent bond
Answer:
B products, reactants
Explanation:
The energy of the reactants is the leftmost letter on the graph given by A, and the energy of the products are given by the rightmost letter on the graph, C.
C is higher in energy than A since it is higher on the diagram, and thus it has more energy. This means the products have more energy than the reactants.