Answer:
Static Friction - acts on objects when they are resting on a surface
Sliding Friction -  friction that acts on objects when they are sliding over a surface
Rolling Friction - friction that acts on objects when they are rolling over a surface
Fluid Friction - friction that acts on objects that are moving through a fluid
Explanation:
Examples of static include papers on a tabletop, towel hanging on a rack, bookmark in a book
, car parked on a hill.
Example of sliding include sledding, pushing an object across a surface, rubbing one's hands together, a car sliding on ice.
Examples of rolling include truck tires, ball bearings, bike wheels, and car tires.
Examples of fluid include water pushing against a swimmer's body as they move through it , the movement of your coffee as you stir it with a spoon,  sucking water through a straw, submarine moving through water.
 
        
             
        
        
        
A nitrogen laser generates a pulse containing 10.0 mj of energy at a wavelength of 340.0 nm and has 1785 x 10¹⁹ photons in the pulse.
<h3>How many photons are in the pulse?</h3>
Energy of a single photon is
E=hcλ
E=6.626×10⁻³⁴ J s×3×108 m/s /340×10⁻⁹ m
E=6.31×10⁻¹⁹  J
Number of photons in the laser is
n=Total Energy/Energy per photon
n=10⁷×10⁻³J /5.90×10⁻¹⁹J/photon
n= 1785 x 10¹⁹ photons
To learn about photons, refer: brainly.com/question/20912241?referrer=searchResults
#SPJ4
 
        
             
        
        
        
Answer:
The appropriate response is " ". A further explanation is described below.
". A further explanation is described below.
Explanation:
The torque ( ) produced by the force on the dam will be:
) produced by the force on the dam will be:
⇒  
On applying integration both sides, we get
⇒  
⇒     
⇒     ![=pgL[\frac{h^3}{2} -\frac{h^3}{3} ]](https://tex.z-dn.net/?f=%3DpgL%5B%5Cfrac%7Bh%5E3%7D%7B2%7D%20-%5Cfrac%7Bh%5E3%7D%7B3%7D%20%5D)
⇒     
 
        
             
        
        
        
Answer: 25.38 m/s
Explanation:
We have a straight line where the car travels a total distance  , which is divided into two segments
, which is divided into two segments  :
:
 (1)
 (1)
Where 
On the other hand, we know speed is defined as:
 (2)
 (2)
Where  is the time, which can be isolated from (2):
 is the time, which can be isolated from (2):
 (3)
 (3)
Now, for the first segment  the car has a speed
 the car has a speed  , using equation (3):
, using equation (3):
  (4)
 (4)
  (5)
 (5)
  (6) This is the time it takes to travel the first segment
 (6) This is the time it takes to travel the first segment
For the second segment  the car has a speed
 the car has a speed  ,  hence:
,  hence:
  (7)
 (7)
  (8)
 (8)
  (9) This is the time it takes to travel the secons segment
 (9) This is the time it takes to travel the secons segment
Having these values we can calculate the car's average speed  :
:
 (10)
 (10)
 (11)
 (11)
Finally:
 
 
 
        
             
        
        
        
A good heat insulator absorbs all, or almost all, of the heat energy 
from any heat that flows through it.
A good electrical insulator absorbs all, or almost all, of the energy 
from any electric current that flows through it.