Answer:
Displacement is the word we use for the distance covered so in this case when a car travels 20 meters east in 1 second, at the end of that 1-second interval a car travels a distance of 20 meters.
And the distance covered is the displacement, so it means that displacement of the car after 1 second is 20 meters east.
Answer:
1.because of this they can save 2.the fund allows them to buy food I don't know if that's right
Explanation:
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Answer:
After 9 more minutes, her cell battery will be 80% charged.
Explanation:
Let us try to make an equation here to describe the relation between battery and time.
It is given that the battery charges at a constant rate so we can assume that
battery(
) ∝ Time(
)
But at t=0, the battery is already 30% charged so we rewrite the equation as follows:
-(1)
Now,
at put t=36 and b=70 in Eqn 1:
We get 
The final eqn is 
Put b=80
We get:
∴ It will take (45-36)=9 more minutes to reach 80% battery.
#SPJ2
30 °
The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. Furthermore, the angle of reflection is equal to the angle of incidence . Both angles are measured with respect to the normal to the mirror.
