Sound moves faster in warmer temperature because the particles move faster
The boy's momentum is 160 kg*m/s north.
The formula of momentum is p = mv, where p is momentum.
p = 40 kg * 4m/s north
p =160 kg*m/s north<span>Thank you for posting your question. I hope you found what you were after. Please feel free to ask me more.</span>
<u>Answer:</u>
<em>The chemical reactions involves changes in energy due to the changes in the breaking and building of bonds.</em>
<u>Explanation:</u>
The changes in energy that chemical reactions involves are:
- <em>Endothermic(absorbing) chemical reactions.</em>
- <em>Exothermic(releasing) chemical reactions. </em>
Endothermic: The chemical reactions which absorbs the energy those chemical reactions are called endothermic chemical reactions.
Exothermic: The chemical reactions which releases the energy those chemical reactions are called exothermic chemical reactions.
The similarity in the reactions is both reactions are related to the change in energy. In one reaction the energy is absorbing and in another reaction the energy is releasing.
Answer:
0.686 m/s
Explanation:
The principle of conservation says the sum of momenta before collision is equal to the sum of momenta after collision in an isolated system. Here, we assume the system is not acted upon by any external force.
The initial momentum = momentum of 1 st cart + momentum of 2nd cart
= 0.400 × 1.2 + 0.300 × 0 = 0.48 kg m/s
The final momentum = (0.400 + 0.300) × v (since they stick together)
0.700 v = 0.48
v = 0.686 m/s
Answer:
There are several modalities, or methods, of treatment: individual therapy, group therapy, couples therapy, and family therapy
Explanation: