Answer: D
All the particles must be uncharged
Explanation:
If all the particles are positively charged, then there will be force of repulsion between them which will give different directions away from each other. The same is applicable if they are all negatively charged.
If the particles are positively and negatively charged, their will be force of attraction between them which will give different directions towards each other.
For all to be experiencing forces in the same direction, We can conclude that
All the particles must be uncharged.
To solve this problem it is necessary to apply the concepts related to thermal linear expansion. Mathematically this concept can be expressed under the Equation:
Where,
Initial Length
Thermal Expanssion constant
Change in Lenght
Our values are given as
Replacing at our equation we have,
Therefore the expantion of the bar is 0.317mm
Velocity and acceleration are vector quantities whereas speed, temperature and age are not.
<h3>What is a vector quantity?</h3>
Vector is a quantity that has both magnitude and direction and is represented by an arrow whose direction is same as that of the quantity and length is proportional to the quantity's magnitude.
Vector has magnitude and direction but it does not have position. Velocity and acceleration both are vector quantities as they have magnitude and direction.
If the speed of an object remains same but direction changes then the object is accelerating. It is important to remember that acceleration and velocity aren't always in the same direction.
To know more about vector quantity, refer
brainly.com/question/626479
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First object:
m=10 kg
F=20 N
F=ma, then:
a=F/m
a=20/10=2 m/s²
Second object:
m=18 kg
F=30 N
a=F/m
a=30/18=1.6 m/s²
The first object has a higher acceleration.
