Answer:
7.74 seconds
Explanation:
u = 25 m/s
h = - 100 m
Let it takes time t to hit the ground.
Use second equation of motion
Take positive sign as time can never be negative.
t = 7.74 s
Thus, the package takes 7.74 seconds to reach the ground.
The cell theory states that:
1) All living organisms are composed of one or more cells.
2) The cell is the basic unit of structure and organization in organisms.
3) Cells arise from pre-existing cells.
Your statement is not present, so the answer would be no.
♧
Answer:
9.73 x 10⁻¹⁰ m
Explanation:
According to Heisenberg uncertainty principle
Uncertainty in position x uncertainty in momentum ≥ h / 4π
Δ X x Δp ≥ h / 4π
Δp = mΔV
ΔV = Uncertainty in velocity
= 2 x 10⁻⁶ x 3 / 100
= 6 x 10⁻⁸
mass m = 0.9 x 10⁻¹⁵ x 10⁻³ kg
m = 9 x 10⁻¹⁹
Δp = mΔV
= 9 x 10⁻¹⁹ x 6 x 10⁻⁸
= 54 x 10⁻²⁷
Δ X x Δp ≥ h / 4π
Δ X x 54 x 10⁻²⁷ ≥ h / 4π
Δ X = h / 4π x 1 / 54 x 10⁻²⁷
= 
= 9.73 x 10⁻¹⁰ m
Answer:
Original Weight = 48 N
Explanation:
When an object hanging from the roof of an elevator and the elevator moves upward with a certain acceleration say a, then the observe weight is always greater than the actual weight.
And when elevator moves downward direction with acceleration a, then the observe weight is always lesser than the actual weight.
Given data:
a = 2.45 m/s²
Balance reading = Tension = T = 60 N
As elevator moves upward,
So,
T = m(g + a)
60 N = m(9.81 + 2.45)
m = 60/12.26
m = 4.89 kg
This is the original mass of the hanging fish.
We know that
Weight = W = mg
W = 4.89 × 9.81
W = 48 N
Given that,
mass of ball , m =11 lbs
Time , t = 1.0 seconds
Acceleration , a = 9.8 m/s²
Distance , s = ?
Since, we know that,
S = Vi *t + 1/2 at²
Since initial velocity is zero in this case (ball was at state of rest before falling to the ground)
S = 1/2 *9.8 * (1)²
S = 4.9 m
The distance covered by ball after one second will be 4.9 m.
