Brandi poses as Lady Justice for a skit in her government class. She holds a set of scales above her head with her right hand an
2 answers:
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Answer:
The number of half-lives that have occurred are 4.
Explanation:
Formula used for number of half lives :
where,
a = amount of reactant left after n-half lives
= Initial amount of the reactant
n = number of half lives
n = 4
The number of half-lives that have occurred are 4.
Answer:
1.25377 m/s²
Explanation:
m = Mass of person
g = Acceleration due to gravity = 9.81 m/s²
= Coefficient of friction
= Slope
From Newton's second law
Applying to the above equation and
The acceleration of the same skier when she is moving down a hill is 1.25377 m/s²
1.
Answer:
a) It is less
Explanation:
By energy conservation we can say that initial potential energy of both child must be equal to the final kinetic energy of the two child.
Since initially they are at same height so we will say that initial potential energy will be given as
and MgH
so the child with greater mass has more energy and hence smaller child will reach with smaller kinetic energy
2.
Answer:
b. The two speeds are equal.
Explanation:
As we know by mechanical energy conservation law we have
since both child starts at same height so here they both will reach the bottom at same speed
3.
Answer:
c. The two accelerations are equal
Explanation:
Since we know that average acceleration of the motion is given as
since here initial and final speeds are same so they both must have same average acceleration here.