1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sesenic [268]
3 years ago
7

Two friends at different locations want to communicate with each other by sending low energy signals. Which of the following met

hods 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 radiations, 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.
Chemistry
1 answer:
BlackZzzverrR [31]3 years ago
4 0

Answer: C Send radio waves through intervening media like radio and television

Explanation:

I took the test

You might be interested in
What is the parts of the Transverse wave and longitudinal wave
dexar [7]
Crest, trough, amplitude and wavelength 
3 0
3 years ago
Please help on how to solve this problem it’s for isotopes
wlad13 [49]

Mg-19:

#protons = 12

#neutrons = 7

#electrons = 12

Mg-40:

#protons = 12

#neutrons = 28

#electrons = 12

8 0
3 years ago
DUEEEEE IN 1 minutess!!! BEING TIMED!!
melomori [17]

Answer:

pH = 13

The higher the pH, the more basic.

Good luck :)

6 0
3 years ago
Determine the chemical formulas for the two compounds below. (Carbon, Hydrogen, and Oxygen).
tester [92]
Remember that any intersection of lines is a C, and that the number of hydrogens attached are the necessary to complet the 4 bonds.

1) CH3 - CH (OH) - CH (CH3) -CH3

2) CH3 - O - CH(CH3)-CH2 - CH3

I have used the parenthesis to indicate that the radical inside is in other branch, bonded by a single line -
4 0
3 years ago
Which compound contains both ionic and covalent
musickatia [10]

Answer:

(3) NaNO₃

Step-by-step explanation:

Sodium nitrate has ionic bonds, because it consists of Na⁺ and NO₃⁻ ions.

However, the nitrate ions have <em>covalent bonds</em> between the O atoms and the central N atoms.

(1) and (2) are <em>wrong</em>. Both N₂O₅ and HCl consist of nonmetals, so they are <em>covalent</em> compounds.

(4) is <em>wrong</em>. NaCl has <em>only ionic bonds</em> between the Na⁺ and Cl⁻ ions

7 0
3 years ago
Read 2 more answers
Other questions:
  • “It is important we work together on this project; we want our group to succeed.” This statement reflects __________.
    14·1 answer
  • A 1.0-ml volume of seawater contains about 4.0 3 10212 g of gold. the total volume of ocean water is 1.5 3 1021 l. calculate the
    14·1 answer
  • Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude
    14·2 answers
  • Hemoglobin is a large protein molecule that is responsible for carrying oxygen through the blood. Iron ions are a relatively sma
    15·1 answer
  • How do chemical indicators work? explain
    14·1 answer
  • How many moles of potassium bromide (KBr) are in 97.569 grams?
    11·1 answer
  • 1. What are the characteristics of a gas?
    5·1 answer
  • The molar mass of a substance is 92.010g. The substance is 30.4% nitrogen and 69.9% oxygen. What is the empirical formula and th
    9·1 answer
  • Lmfjwkwmwmwmamammanwnwnebebs. sss<br>sms<br>ask
    12·1 answer
  • Why are no flying dinosaur fossils found in rocks that are younger than those
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!