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kirill115 [55]
3 years ago
12

Momentum is a vector quantity. Explain this statement ​

Physics
1 answer:
Alex777 [14]3 years ago
6 0
<h2>Answer:</h2>

Momentum is a vector quantity; i.e., it has both magnitude and direction. ... The momentum of any collection of particles is equal to the vector sum of the individual momenta.','.

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Which state has the most fixed shape?<br> O A. Gas<br> O B. Solid<br> O C. Liquid<br> O D. Plasma
Mrac [35]

Answer: Liquid

“A substance will take on the shape of an open container if it is a Liquid. Explanation: The major state of matter are solid, liquid and gas. Liquid usually have a definite volume.”

3 0
3 years ago
One particular confound for the use of an adoption study of heritability is the phenomenon of _____ placement, in which a child
Tresset [83]

Answer:

D) selective

Explanation:

The selective placement in the adoption studies refers to practice by which the adoption agencies tend to match some definite characteristics of the adopted child's adopted parents than that of child's biological parents.

It results in the correlation of the environments between the biological relatives raised in two different homes.

<u>For example, when the child is placed in a home which is similar to the home of the biological parents.</u>

3 0
4 years ago
What kind of injury would most likely come from an unfortunate slide into home in a baseball game?
quester [9]
Macule i do believe.
5 0
3 years ago
f the magnitude of the acceleration of a propeller blade's tip exceeds a certain value amaxamax, the blade tip will fracture. If
Luden [163]

Answer:

The angular velocity is   w= \sqrt[4]{\frac{a_{max}^2}{r^2}  - \alpha ^2}      

Explanation:

Generally the acceleration experienced by the propeller blade's is broken down into

          The Radial acceleration which is mathematically represented as

                              a_r = \frac{v^2}{r}  = w^2r

And the Tangential  acceleration which is mathematically represented as

                                a_r = \alpha r

  The net acceleration is evaluated as

                      a = \sqrt{a_r^2 + a_t^2}

       

Now since angular speed varies directly with angular acceleration so when acceleration is maximum the angular velocity is maximum also and this point if the propeller blade's tip exceeds it the blade would fracture

                 

So at maximum angular acceleration we a have

             a_{max} = \sqrt{a_r^2 + a_t^2}

                     a_{max}^2 = a_r^2 + a_t^2

                    a_{max}^2 = (w^2r)^2 + (\alpha r)^2

                 a_{max}^2 =  r^2 w^4 + r^2 \alpha ^2

                  a_{max}^2 = r^2 (w^4 + \alpha^2 )

                w^4 +\alpha ^2 = \frac{a_{max}^2}{r^2}

                         w^4 = \frac{a_{max}^2}{r^2}  - \alpha ^2

                         w= \sqrt[4]{\frac{a_{max}^2}{r^2}  - \alpha ^2}        

                     

3 0
3 years ago
Jane has a mass of 40 kg. She pushes on a rock with a force of 100 N. what force does the rock exert on Jane
Phoenix [80]

Answer:

100N

Explanation:

if Jane pushes on the rock with 100 Newtons of force, then the rock pushes on Jane with 100 Newtons of force.

hope this helps :)

5 0
3 years ago
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