You stand on a spring scale on the floor of an elevator. The scale shows the highest reading when the elevator
1 answer:
Answer:
2. moves upward with increasing speed.
Explanation:
When an object it going up in an elevator, the object experiences the upward acceleration as well as the acceleration due to gravity. This means that the object feels that they are being pushed down.
Hence, the scale shows highest reading when the elevator moves upward with increasing speed.
The force on the scale would be
Where,
m = Mass of object
g = Acceleration due to gravity = 9.81 m/s²
a = Acceleration of the elevator
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Answer:
The electric field always decreases.
Explanation:
The electric field due to a point charge is given by :
Where
k = electric constant
q = charge
r = distance from the charge
It is clear from the above equation that as the distance from the charge particle increases the electric field decreases. As you move away from a positive charge distribution, the electric field always decreases. Hence, the correct option is (c) "Always decreases".
Answer:
and 20.86 seconds are the values of the rate constant and the half-life for this process respectively..
Explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample
= let initial amount of the reactant
a = amount left after decay process
We have :
t = 95 s
Half life is given by for first order kinetics::
and 20.86 seconds are the values of the rate constant and the half-life for this process respectively..