Snail0369
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- 2002-05-03
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如果可以的话 对于那些一定要有1.0的学分in natural science 的同学是造福了 report 抄以下 webct 分数 拿满就及格了 学期随便打发一下 就okay了
1008 真的要做 也挺费时间的 而且这些棵大多数人 take 都是选修课 混个B就okay 了
有同学如果觉得可行 可以post 你们以前的 题目 记得 remove 你自己的名字 和答案 只要 题目的准确答案就好了 ... 如果能提供 公式 那最好
我带个头 PHYS 1008 / Assignment 1
Question 1 (10 points)
Two charged smoke particles exert a force of 0.00001 N on each other. What will be the force if they are moved so they are 1/5 as far apart? n.b. give your answer in Newtons, and express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 2.5000E-4 (2.5000 * 10-4)
(5^2*0.00001)
Question 2 (10 points)
The electric field midway between two equal but opposite point charges is 669 N/C, and the distance between the charges is 8 cm. What is the magnitude of the charge on each? n.b. give your answer in Coulombs, and express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 5.95E-11 (5.95 * 10-11)
[669*(8/2)^2]/(2*9*10^9)
Question 3 (10 points)
Two charges have the same sign, but different magnitudes: 3 µC and 12 µC, and they are a distance 2 cm apart. At what distance (in cm.) from the charge of 3 µC will the field be zero?
Correct answer: 0.67
2/(1+sqrt(12/3)
Question 4 (10 points)
A charged object of mass 6 g and charge 6 µC is released from rest in a uniform electric field and accelerates a rate of 515 m/s2. What is the magnitude of the electric field? n.b. give your answer in N/C, and express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 5.15E5 (5.15 * 105)
(0.006* 515)/(6*10E-6)
Question 5 (10 points)
The earth has a radius of 3850 km and an electric field at the surface of 153 N/C. What would the charge need to be on the Earth's surface to maintain this? n.b. Express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 2.52E5 (2.52 * 105)
1008 真的要做 也挺费时间的 而且这些棵大多数人 take 都是选修课 混个B就okay 了
有同学如果觉得可行 可以post 你们以前的 题目 记得 remove 你自己的名字 和答案 只要 题目的准确答案就好了 ... 如果能提供 公式 那最好
我带个头 PHYS 1008 / Assignment 1
Question 1 (10 points)
Two charged smoke particles exert a force of 0.00001 N on each other. What will be the force if they are moved so they are 1/5 as far apart? n.b. give your answer in Newtons, and express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 2.5000E-4 (2.5000 * 10-4)
(5^2*0.00001)
Question 2 (10 points)
The electric field midway between two equal but opposite point charges is 669 N/C, and the distance between the charges is 8 cm. What is the magnitude of the charge on each? n.b. give your answer in Coulombs, and express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 5.95E-11 (5.95 * 10-11)
[669*(8/2)^2]/(2*9*10^9)
Question 3 (10 points)
Two charges have the same sign, but different magnitudes: 3 µC and 12 µC, and they are a distance 2 cm apart. At what distance (in cm.) from the charge of 3 µC will the field be zero?
Correct answer: 0.67
2/(1+sqrt(12/3)
Question 4 (10 points)
A charged object of mass 6 g and charge 6 µC is released from rest in a uniform electric field and accelerates a rate of 515 m/s2. What is the magnitude of the electric field? n.b. give your answer in N/C, and express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 5.15E5 (5.15 * 105)
(0.006* 515)/(6*10E-6)
Question 5 (10 points)
The earth has a radius of 3850 km and an electric field at the surface of 153 N/C. What would the charge need to be on the Earth's surface to maintain this? n.b. Express scientific notation as 1.6E-03 for 1.6 times 10 to the power of minus three.
Correct answer: 2.52E5 (2.52 * 105)
