Physics High School

A student charges a balloon and then brings it near a metal sphere hanging from the
ceiling. She brings it near the sphere, but does not touch. The sphere moves toward
the balloon. What are the charges on the balloon and the metal sphere?
a) The balloon has a positive charge and the metal sphere has a negative charge.
b) The balloon has a negative charge and the metal sphere has a positive charge.
c) Both are negatively charged.
d) Both are positively charged.

Answers

Answer 1

Answer:

Explanation:

the balloon has a negative charge and the metal sphere has a positive charge

Answer 2

Answer: B

Explanation:

The balloon will pick up stray electrons, so it will become negatively charged. Since it is attracted to the metal sphere, the sphere must be positively charged.

Related Questions

PLEASE HELP!! NO LINKS OR RANDOM WORDS!! If you were looking at the Moon from space (so that you could see all sides of it), how much of it would be lit by the sun at any given time?

1) All of it
2) Half of it
3) It varies depending on the Moon's phase.
4) It varies depending on the time of the year.

Answers

i think it is all of it bc the sun never stops shining

Answer:

3) It varies depending on the Moon's phase.Explanation:

Describe the movement of molecules in an ice cube at the temperatures shown, and indicate whether the ice cube will change state.

Answers

Answer: The ice molecules expand and become stuck since the water is frozen and start to vibrate

Explanation:

According to the concept of thermal energy, as the temperature rises thermal energy increases and molecules start vibrating faster and ice changes it's state to water that is from solid to liquid.

What is thermal energy?

Thermal energy is defined as a type of energy which is contained within a system and is responsible for rise in temperature.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance containing molecules or atoms are vibrating faster.

These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the number of collision of particles , higher is the thermal energy.

Learn more about thermal energy,here:

https://brainly.com/question/3022807

#SPJ2

20 points and brainlist!!!
Write about a situation where it might be more useful to describe motion using velocity instead of speed.

Answers

Answer:

If you are going someplace, you might want to tell which way you were going and how fast for traffic.

Explanation:

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Answers

Answer:

Neseciti puntos oara mi tarea y mad ni entiendo lo wue dices

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Answers

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The speed of sound wave in water is much more greater than its speed in air, so when the sound wave passes from sea water to air, then it's speed decreases.

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Answers

please find ur answer in the attached image, mark as brainliest if it helps.

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