Answer:
8.86m/s
Explanation:
The attachment below contain the explanation and answer
Answer:
2.6×10⁻³ N
Explanation:
From coulomb's law,
F = kq'q/r²................ Equation 1
Where F = Repulsive force, q' = charge on the first sugar grain, q = charge on the second sugar grain, r = distance of separation between the sugar grain, k = proportionality constant.
From the question,
since q' = q
Then,
F = kq²/r²..................... Equation 2
Given: q = 1.79×10⁻¹¹ C, r = 3.45×10⁻⁵ m,
Constant: k = 9×10⁹ Nm²/kg².
Substitute into equation 2
F = 9×10⁹(1.79×10⁻¹¹)²/(3.45×10⁻⁵ )²
F = 9×10⁹(3.2041×10⁻²²)/(11.9025×10⁻¹⁰)
F = (28.8369×10⁻¹³)/(11.9025×10⁻¹⁰)
F = 2.6×10⁻³ N.
Answer:
i think this may help you
Explanation:
In an inelastic collision the total kinetic energy after the collision is not equal to the total ... If there are no net forces at work (collision takes place on a frictionless surface ... Momentum is equal to the product of mass and velocity. ... bodies before the collision is equal to the total kinetic energy of the bodies after the collision.
Answer:
Scientific research can promote the raise of the productivity of the society.Which means it can help people produce more goods in a much shorter time and better quality.
From the perspective of a country, if scientific research will not be supported, that country will face a highly pressure and threaten from other counties due to the technology advancement.Technology development will largely determine the military and economic power of a country.
From personally view,our next generation need to be good educated with support.A large part of the area will focus on scientific research,so if we want our children to perform better than us and create a better future.We need to support the scientific research.Nowadays, the AI technology is a very good example that society should support the scientific research. In the long run, we not only benefit from the progress and facility,but we can harvest from the investment into the AI scientific research.
Not the least,scientific research will help human being to know the unknown things in the society,that deep understanding will contribute ourselves to get better way to get along with the new environment and new world.
Answer: ) Khi nào một vật được coi là chuyển động ? Cho ví dụ ?
b) Khi nào một vật coi là đứng yên? Cho ví dụ ?
c) Theo em câu phát biểu “ Khi khoảng cách từ vật đến vật mốc không thay đổi theo thời gian thì vật đứng yên so với vật mốc”. Có luôn đúng không, vì sao?
Explanation:
