♥jayben♥

1. An oxygen atom has 8 protons in its nucleus. (a) How many electrons does this atom contain? (b) How many electron does the O "raised to -2" contain?

2. What information is provided by a sketch of the field lines of an electric field?

3. Why is it impossible for the field lines of an electric field to cross one another?

4. A rod with charge of +q at one end and -q at the other is placed in a uniform electric field whose direction is parallel to the rod. How does the rod behave?

5. The rod of Prob. 4 is placed in a uniform electric field whose direction is perpendicular to the rod. How does the rod behave?

6. A billion (10 raised to the 9) electrons are added to a neutral pith ball. What is its charge?

7. What is the force between two + 1-C charges located 1 m apart?

8. What are the magnitude and direction of the force on a charge of +2 x 10 raised to -7 C that is 0.3 cm from a charge of -5 x 10 raised to -7 C?

9. Two electrons repel each other with a force of 10 raised to -8 N. How far apart are they?

10. Two charges attract each other with a force of 10 raised to - 6 N. How apart should they be for the force between them to be (a) 10 raised to -4 N and (b) 10 raised to - 8 N?

11. A test charge of +2 x 10 raised to -7 C is located at 5cm to the right of a charge of +1 x 10 raised to -6 and 10 cm to the left of a charge of -1 x 10 raised to -6 C. The three charges lie on a straight line. Find the force on the test charge.

12. A charge of +1 x 10 raised to -7 C and a charge of + 3 x 10 raised to -7 are 40 cm apart. (a) where should a charge of +q be placed on the line between these charges so that no net force acts on it? (b) Where should a charge of -q be placed?

13. How much force is exerted on a charge of 10 raised to -6 by an electric field of 50 V/m?

14. An electron is present in an electric field of 10 raised to 4 V/m. (a) Find the force on the electron. (b) Find the electron's acceleration.

15. Two charges of +10 raised to -6 are located 1 cm apart. (a) What is the force on a charge of +10 raised to - 8 C halfway between them? (b) What is the force on a charge of -10 raised to -8 C at the same place? (c) What must be true of the strength of the electric field between the two +10 raised to -6 C charges?

16. A potential difference of 100 V is applied by a battery across a pair of metal plates 5 cm apart. (a) What is the electric field between the plates? (b) How much force does a charge of +10 raised to -8 experience in this field? (c) How much kinetic energy does this charge acquire when it goes from the positive plate to the negative plate?

17. A charge of - 2 x 10 raised to -9 C in an electric field between two parallel metal plates 5 cm apart is acted on by a force of 10 raised to -4 N. (a) What is the strength if the field? (b) What is the potential difference between the plates?

18. A proton is accelerated by a potential difference of 15,000 V. What is its kinetic energy?

19. A particle of charge of 10 raised to -12 start to move from the rest in an electric field of 500 V/m. (a) What is the force on the particle? (b) How much kinetic energy will it have when it has moved 1 cm in the field?

20. When a certain 12-V storage battery is charged, a total of 10 raised to 5 C is transferred from one set of its electrodes to the other set. Find the energy stored in the battery.

How can you NOT call a technical foul on that?

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REAL bad.

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1.Rommel can finish the construction of a small day-care center in 12 days. After working for two days, Boni joined him and together, they were able to finish the job in another 5 days. How many days will it take Boni to finish the work alone?

2.Gary and Ato each played six games of bowling. Their total score was 1,392. Gary scored 144 points less than Ato. What was Gary's average score per game?

Thanks =)

Katrina bought two hoses. The first hose will fill up an oil tank twenty percent slower than the second. If Katrina uses both hoses to fill up an oil tank, it will take 16 minutes. How long will it take if Katrina only uses the second hose?

Question 12 answers

A. 35.2 minutes

B. 28.8 minutes

C. 29.33 minutes

D. 36 minutes

please help me =)

At Moonbucks Cafe, one kind of coffee sells for P50 a cup and another sells for P150 a cup. How much of each coffee should be used to make 10 cups of a coffee mixture that sells for P130 a cup?

Question 10 answers

A. 5 cups of P50 coffee and 5 cups of P150 coffee

B. 2 cups of P50 coffee and 8 cups of P150 coffee

C. 8 cups of P50 coffee and 2 cups of P150 coffee

D. 3 cups of P50 coffee and 7 cups of P150 coffee