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
ale4655 [162]
3 years ago
14

Is saliva breaking a down a piece of bread chemical or physical

Physics
2 answers:
Elza [17]3 years ago
8 0
It's a chemical change since it cannot be reversed and the saliva releases a new substance
Vlad1618 [11]3 years ago
5 0
Chemical because saliva has a acid type substance in it
You might be interested in
What is the slant of a line on a graph called
tatiyna

Ashleybotello0129,

What is the slant of a line on a graph called "the slope." Slopes are in math, and science. Slopes look like slanted lines start from one side and to another.

Hope this helps!

7 0
3 years ago
Two positive point charges, each of which has a charge of 2.5 × 10−9 C, are located at y = + 0.50m and y = − 0.50m. Find the mag
nadya68 [22]

Answer:

F = 147,78*10⁻⁹ [N]

Explanation:

By symmetry the Fy components of the forces acting on charge in point x = 0,7 m canceled each other, and the total force will be twice Fx ( Fx is x axis component of one of the forces .

The angle β  ( angle between the line running through one of the charges in y axis and the charge in x axis) is

tan β  =  0,5/0,7

tan β  = 0,7142    then   β = arctan 0,7142      ⇒   β = 35 ⁰

cos  β = 0,81

d = √ (0,5)²  +  (0,7)²       d1stance between charges

d = √0,25 + 0,49

d =  √0,74  m

d = 0,86  m

Now Foce between two charges  is:

F  = K* q₁*q₂/ d²      (1)

Where  K  = 9*10⁹ N*m²/C²

q₁  =  2,5* 10⁻⁹C

q₂  = 3,0*10⁻⁹C

d²  = 0,74 m²

Plugging these values in (1)

F  =  9*10⁹* 2,5* 10⁻⁹*3,0*10⁻⁹ / 0,74       [N*m²/C²]*C*C/m²

F = 91,21 * 10⁻⁹   [N]

And  Fx  =  F*cos  β

Fx  =  91,21 * 10⁻⁹ *0,81

Fx =73,89*10⁻⁹  [N]

Then total force acting on charge located at x = 0,7 m is:

F = 2* Fx

F = 2*73,89*10⁻⁹  [N]

F = 147,78*10⁻⁹ [N]

8 0
3 years ago
Why do blades come in different lengths in a jig saw sander?​
trasher [3.6K]

Answer:

To determine the minimum blade length, add 1" to the workpiece thickness. One type of material, and some materials can be cut by more than one type of blade. No matter the material, there's likely a jigsaw blade designed specifically for. Armed with the right blade, follow these pointers to make your work go (and cut) .

Explanation:

6 0
3 years ago
What is the mass of a tennis ball traveling with a velocity of 3 m/s and a momentum of
ELEN [110]

Answer:

Explanation:

P = mv  

m = P/v

m = .25/3 = .08 Kg ... A

5 0
3 years ago
In a football game, running back is at the 10-yard line and running up the field towards the 50 yard
kotykmax [81]

Answer:

34 yards or 34 yard line

Explanation:

8 × 3 = 24

24 + 10 = 34

8 0
3 years ago
Other questions:
  • Something that claims to be science but is not is called
    13·1 answer
  • Which is not one of Aristotle’s four elements <br> Water<br> Fire<br> Earth<br> Oxygen
    12·2 answers
  • What is the resultant of the two vectors shown?
    7·2 answers
  • An object in free fall is dropped from a building. Its starting velocity is 0 m/s. Ignoring the effects of air resistance, what
    9·1 answer
  • By exerting a force on the astronaut, the vehicle in which they orbit experiences an equal and opposite force. If the mass of th
    8·1 answer
  • Proposed Exercise - Circular Movement
    13·1 answer
  • A tennis ball is launched at an angle of 30° at a velocity of 40 m/s. What is the vertical component of the velocity right befor
    15·1 answer
  • Which of the following does not change the resistance of a wire?
    7·1 answer
  • I need help ;-;
    9·2 answers
  • Slove these problem physics ​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!