apa bae

• cheat
• zap me - 2000 electricity
• fantastic plastic - 3000 plastic
• ahoy captain dan - 1 set of paratroopers
• color me stupid - Changes the color of all units
• Punch Line - Doubles the Dump Trucks Capacity
• Brain Sick - Makes the enemy stronger
• iseedeadpeople - Enable seeing enemies

Check Your Understanding

Use your understanding of charge to answer the following questions. When finished, click the button to view the answers.

1. TRUE of FALSE: An object that is positively charged contains all protons and no electrons.

2. TRUE of FALSE: An object that is negatively charged could contain only electrons with no accompanying protons.

3. TRUE of FALSE: An object that is electrically neutral contains only neutrons.

4. Identify the following particles as being charged or uncharged. If charged, indicate whether they are charged positively or negatively. (n = neutron, p = proton, e = electron)

5. Consider the graphic at the right of a neutral oxygen atom.

a. Explain what must happen in order for the oxygen atom to become negatively charged.b. Explain what must happen in order for the oxygen atom to become positively charged.
6. Determine the quantity and type of charge on an object that has 3.62 x 10¹² more protons than electrons.
7. Complete the following statements:

After some rather exhausting counting (and a rather tall tale), a physics teacher determines that a very small sample of an object contains ...

a. ... 8.25749 x 10¹⁷ protons and 5.26 x 10¹⁴ electrons; the charge on this object is ____ Coulombs.

b. ... 3.12 x 10¹⁴ protons and 4.5488 x 10¹⁶ electrons; the charge on this object is ____ Coulombs.

c. ... 2.40277 x 10¹⁹ protons and 9.88 x 10¹⁶ electrons; the charge on this object is ____ Coulombs.

d. ... 2.6325 x 10¹⁵ protons and 2.6325 x 10¹⁵ electrons; the charge on this object is ____ Coulombs.

8. The amount of charge carried by a lightning bolt is estimated at 10 Coulombs. What quantity of excess electrons is carried by the lightning bolt?

9. Respond to the following student statement:

"A positively charged object is an object that has an excess of positive electrons."

Another Example

Suppose that two point charges, each with a charge of +1.00 Coulomb are separated by a distance of 1.00 meter. Determine the magnitude of the electrical force of repulsion between them.

Given: Q1 = 1.00 CQ2 = 1.00 C d = 1.00 m

Find: Felect = ???

The next and final step of the strategy involves substituting known values into the Coulomb's law equation and using proper algebraic steps to solve for the unknown information. This step is shown below.

F_elect = k • Q₁ • Q₂ / d²F_elect = (9.0 x 10⁹ N•m²/C²) • (1.00 C) • (1.00 C) / (1.00 m)²
F_elect = 9.0 x 10⁹ N

Example C

Two balloons with charges of +3.37 µC and -8.21 µC attract each other with a force of 0.0626 Newton. Determine the separation distance between the two balloons.

The problem states the value of Q₁ and Q₂. Since these values are in units of microCoulombs (µC), the conversion to Coulombs will be made. The problem also states the electrical force (F). The unknown quantity is the separation distance (d). The results of the first two steps are shown in the table below.

Given: Q1 = +3.37 µC = +3.37 x 10-6 CQ2 = -8.21 µC = -8.21 x 10-6 C Felect = -0.0626 N (use a - force value since it is repulsive)

Find: d = ???

As mentioned above, the use of the "+" and "-" signs is optional. However, if they are used, then they have to be used consistently for the Q values and the F values. Their use in the equation is illustrated in this problem.

The final step of the strategy involves substituting known values into the Coulomb's law equation and using proper algebraic steps to solve for the unknown information. In this case, the algebra is done first and the substitution is performed last. This algebra and substitution is shown below.

F_elect = k • Q₁ • Q₂ / d²d² • F_elect = k • Q₁ • Q₂
d² = k • Q₁ • Q₂ / F_elect
d = SQRT(k • Q₁ • Q₂) / F_elect
d = SQRT [(9.0 x 10⁹ N•m²/C²) • (-8.21 x 10^-6 C) • (+3.37 x 10^-6 C) / (-0.0626 N)]
d = Sqrt [ +3.98 m² ]
d = +1.99 m

Check Your Understanding

Use your understanding to answer the following questions. When finished, click the button to view the answers.

1. The Q in Coulomb's law equation stands for the _____.

a. mass of a charged object	b. # of excess electrons on the object
c. the current of a charged object	d. the distance between charged objects
e. charge of a charged object

a. A to B	b. A to D	c. B to C	d. B to D
e. C to D	f. A to G	g. B to F	h. C to E

3. Determine the electrical force of attraction between two balloons with separate charges of +3.5 x 10^-8 C and -2.9 x 10^-8 C when separated a distance of 0.65 m.

4. Determine the electrical force of attraction between two balloons that are charged with the opposite type of charge but the same quantity of charge. The charge on the balloons is 6.0 x 10^-7

C and they are separated by a distance of 0.50 m.

5. Joann has rubbed a balloon with wool to give it a charge of -1.0 x 10^-6 C. She then acquires a plastic golf tube with a charge of +4.0 x 10^-6 C localized at a given position. She holds the location of charge on the plastic golf tube a distance of 50.0 cm above the balloon. Determine the electrical force of attraction between the golf tube and the balloon.

6. A balloon with a charge of 4.0 µC is held a distance of 0.70 m from a second balloon having the
same charge. Calculate the magnitude of the repulsive force

7. At what distance of separation must two 1.00-microCoulomb charges be positioned in order for the repulsive force between them to be equivalent to the weight (on Earth) of a 1.00-kg mass?