# Physics

1)Which of the following statements is true about electric forces?

A)electric forces cause objects to only attract each other.
B)electric forces cause objects to only repel each other
C)electric forces cause objects to repel or attract each other
D)electric forces have no effect on each other

2)A negatively charged balloon sticks to a wooden door. However, an uncharged balloon does not stick to a wooden door. What is the nature of the charge on the wooden door?

A)electrically neutral
B)positively charged
C)conductor
D)lacking protons

I got 3 different answers each time for A-C, but my final answer is A.

1. 👍 0
2. 👎 0
3. 👁 1,816
1. 1 A)

2. The overall charge of the door may be neutral if it is not electrically grounded, but the door area in contact with the balloon is charged positively in any case, due to polarization and induction. I don't whether to advise you to answer A or B, because the question is too vague about grounding and which part of the door they are referring to.

1. 👍 0
2. 👎 0
2. 1) elctric forces do both that's why like charges repel and opposites attract

1. 👍 0
2. 👎 0
3. Yes, I meant to write C. for (1) I was concentrating on answering your second question. My mistake.

1. 👍 0
2. 👎 0

## Similar Questions

Multiple Choice 1. Which sphere of the Earth system contains all living organisms? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following statements best describes the geosphere? (1 point) the sphere that

2. ### science

erosion and weathering are examples of which type of forces ? a) constructive forces b) destructive forces c) gravitational forces d) inertia-related forces

3. ### science

Which of the following is true about the electric charges on the objects below?

4. ### Physics

A body is under action of 2 forces ,7N and 10N . Find the resultant of the 2 forces, if (a)the forces are parallel and act in the same direction (b) the forces are parallel and act in the opposite direction (c) the forces are

1. ### physics

a body i under the action of two forces 7N and 10N find the resultant of the two forces if the forces are parallel and act in thesame direction

2. ### Science

1. Which of the following statements about Newton's Third Law is the most true? a The forces acting upon two objects are dependent on the initial velocities of the objects b The law of conservation of momentum is obeyed in all

3. ### Science

Lesson 10: Introduction to Planet Earth Unit Test Science 6 B, i have my answers i need someone to check them please!! and thanks you. connexus academy answers only pls thanks. 1. which of earths spheres contains most of its mass

4. ### physics

Three point charges, q1, q2, and q3, lie along the x-axis at x=0, x=3 cm, and x=5 cm, respectively. Calculate the magnitude and direction of the electric force on each of the three points when q1=+6.0 muC, q2=+1.5 muC, and q3=-2.0

1. ### physics

Which of the following statements about electric field lines due to static charges are true? (Select all that apply.) Electric field lines can never cross each other. Static charges can create closed loop electric field lines that

2. ### Physics helppp

Which of the following statements are TRUE? Select all that apply. An isolated system is one in which objects inside the system are not influenced by any forces from outside the system. The mechanical energy of a pendulum bob is

3. ### science/chemistry

Dr Bob Although helium atoms do not combine to form He2 molecules. is it true to say that He atoms are weakly attracted to one another from London dispersion forces (induced dipole forces) or is there another force at play? It

4. ### CHEMISTRY

although helium atoms do not combine to form He2 molecules is it fair to say that London dispersion forces (induced dipole forces)are what attract He atoms weakly to one another? The other choices are dipole-induced dipole forces