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
Stolb23 [73]
3 years ago
7

Identify the situation where work is being done. Carrying a box of crayons across the room. Lifting a backpack off the floor Hol

ding a football Sitting on a stool
Chemistry
2 answers:
Likurg_2 [28]3 years ago
7 0
Lifting the backpack off the floor. Force is being applied in only one direction then (up) which is what constitutes as work. Carrying the box of crayons applies force in two directions (up and forward), which cancel each other out. Work has a vector, which is a quantity containing both direction and magnitude (one, finite direction, not two).
forsale [732]3 years ago
6 0

Answer:

Lifting a backpack off the floor

Explanation:

You might be interested in
The molecule NH3 contains all single bonds.<br><br> true <br> false
dsp73
<h3><u>Answer;</u></h3>

True

<h3><u>Explanation</u>;</h3>
  • The molecule NH3 contains all single bonds.
  • NH3 has a three single covalent  bond among its nitrogen and hydrogen atoms,because one valence electron of each of three atom of hydrogen is shared with three electron.
  • There are three covalent bonds are in NH3 . Each hydrogen make a single bond with nitrogen and there is also a pair of electron which is unpaired from nitrogen.
8 0
3 years ago
Read 2 more answers
if an element has an atomic mass of 127 and an atomic number of 53, how many neutrons does it have? 74 127 53 75
nadya68 [22]
74 is the answer u find it by subtracting the protons(atomic number) from atomic mas, so basically... 127-53 =74 neutrons
7 0
3 years ago
In one experiment, magnesium metal melts. In a second experiment, magnesium metal ignites as it combines with oxygen. Classify t
joja [24]

Answer:

magnesium metal melts = physical change

magnesium metal ignites = chemical change

Explanation:

<em>Physical changes</em> are those in which the identity of the subtance <u>remains unaltered</u>. No new compounds are formed. They involve generally changes in <u>agreggation states of matter</u>: solid, liquid or gas. The first experiment, in which magnesium metal melts is a physical change because it only changes the state of matter, from solid to liquid, but it is still magnesium metal.

Conversely, <em>chemical changes</em> involve atoms combinations to form new compounds. The second experiment, in which magnesium metal ignites, is a chemical change. After the change, magnesium metal is no longer the metal but a metal oxide.

8 0
3 years ago
What determines the strength of a solute as an electrolyte?
timama [110]
<span>Solutes become electrolytes by ionizing. Ionic compounds therefore make good electrolytes; covalent compounds don't.</span>
8 0
3 years ago
In an electrically neutral atom of any element, there are equal numbers of
Masteriza [31]

Answer:

B. electrons and protons.

Explanation:

In an electrically neutral atom of any element, there are equal number of protons and electrons in the atom.

Protons are the positively charged particles in an atom.

Electrons are the negatively charged particles within the atom.

  When the number of protons and electrons are the same or equal, the atom is neutral.

But when there is an imbalance, an ion results.

8 0
3 years ago
Other questions:
  • Determine the volume of fluid in the graduated cylinder shown.
    12·2 answers
  • A sample of ammonia gas was allowed to come to equilibrium at 400 K. 2NH3(g) &lt;----&gt; N2(g) 3H2(g) At equilibrium, it was fo
    9·1 answer
  • Please fill in the blanks at the bottom!
    9·1 answer
  • PLEASE HELP WORTH 50 POINTS NO LINKS I WILL MARK CORRECT ANSWER BRAINLIEST!!! complete this punnet square, enter your answer in
    10·1 answer
  • If a=1/2(a+b)h,express a in terms of A,b and h. pls solve with step by step ​
    15·1 answer
  • 25 POINTS FOR SCIENCE! PLEASE HELP!! THANK YOU!!!!
    13·1 answer
  • BRAINLIEST!!!!!!! PLEASE HELP!!!!!!!!!!!!!!
    5·1 answer
  • When's the moon at its brightest? (QUICK!)
    8·2 answers
  • A solid block of wood has a mass of 132.5kg and a
    10·1 answer
  • What will happen if you place a cube of ice on the kitchen counter?​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!