![subject](/tpl/images/cats/fizika.png)
Physics, 07.09.2019 19:20 hellenjones30p0kvtl
(a) how many electrons would have to be removed from a penny to leave it with a charge of +1.0×10−7 c? [4]
(b) to what fraction of the electrons in the penny does this correspond? [6]
[a penny has a mass of 3.11 g; assume it is made entirely of copper.]
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 08:40
When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 13:00
Ways that industry and agriculture use physical properties to separate substances
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 19:30
Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 20:00
What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?
Answers: 1
You know the right answer?
(a) how many electrons would have to be removed from a penny to leave it with a charge of +1.0×10−7...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 23.09.2019 04:30
![question](/tpl/images/cats/mat.png)
Mathematics, 23.09.2019 04:30
![question](/tpl/images/cats/mat.png)
Mathematics, 23.09.2019 04:30
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 23.09.2019 04:30
![question](/tpl/images/cats/es.png)
Spanish, 23.09.2019 04:30
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/istoriya.png)
History, 23.09.2019 04:30
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 23.09.2019 04:30
![question](/tpl/images/cats/biologiya.png)
Biology, 23.09.2019 04:30
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)