Answers: 1
Other questions on the subject: Chemistry
Chemistry, 21.06.2019 17:00, debordc17
Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects
Answers: 2
Chemistry, 22.06.2019 12:00, sophiaa23
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
Do you know the correct answer?
How does the number of protons in an atom compare to the number of electrons in an atom?...
Questions in other subjects:
Mathematics, 02.07.2019 19:00
Mathematics, 02.07.2019 19:00
Mathematics, 02.07.2019 19:00
