The kilogram is the Standard International System of Units unit of mass. It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures.
I believe the answer is A
A nuclear power plant doesn't produce any of those things. It only produces electricity and heat. As long as there are no accidents, and the worn out nuclear fuel is handled properly, the nuclear plant isn't harmful to the environment at all.
Answer:
v_f = 10.85 m/s
Explanation:
We will apply the law of conservation of momentum here:
![m_{1}v_{1i} + m_{2}v_{2i} = m_{1}v_{1f}+m_{2}v_{2f}\\](https://tex.z-dn.net/?f=m_%7B1%7Dv_%7B1i%7D%20%2B%20m_%7B2%7Dv_%7B2i%7D%20%3D%20m_%7B1%7Dv_%7B1f%7D%2Bm_%7B2%7Dv_%7B2f%7D%5C%5C)
where,
m₁ = mass of roller skater = 47 kg
m₂ = mass of bag = 6 kg
v_1i = initial speed of roller skater = 12 m/s
v_2i = initial speed of the bag = 0 m/s
v_1f = final speed of the roller skater = ?
v_2f = final speed of the bag = ?
Both the bag and the skater will have same speed at the end because kater is carrying the bag:
v_1f = v_2f = v_f
Therefore, the equation will become:
![(47\ kg)(12\ m/s)+(6\ kg)(0\ m/s)=(47\ kg)(v_{f})+(5\ kg)(v_{f})\\564\ N.s = (47\ kg+5\ kg)(v_{f})\\v_{f} = \frac{564\ N.s}{52\ kg}\\](https://tex.z-dn.net/?f=%2847%5C%20kg%29%2812%5C%20m%2Fs%29%2B%286%5C%20kg%29%280%5C%20m%2Fs%29%3D%2847%5C%20kg%29%28v_%7Bf%7D%29%2B%285%5C%20kg%29%28v_%7Bf%7D%29%5C%5C564%5C%20N.s%20%3D%20%2847%5C%20kg%2B5%5C%20kg%29%28v_%7Bf%7D%29%5C%5Cv_%7Bf%7D%20%3D%20%5Cfrac%7B564%5C%20N.s%7D%7B52%5C%20kg%7D%5C%5C)
<u>v_f = 10.85 m/s</u>