Answer:
(a) 1.28 m
(b) 0.51 s
Explanation:
Given:
Initial speed, U = 5 m/s
Consideration;
1. When the coin is tossed upward, the coin is moving against gravity. Therefor, the acceleration due to gravity experienced by the coin is negative, -g = -9.8 m/s².
2. The final velocity of the coin in the air is zero.
From equation of motion under free fall,
V² = U² + 2gh
h =
Where;
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity
h is the height
h = 1.2755 m
h = 1.28 m
(b) The coin still has its initial velocity, u to be equal to 5 m/s, final velocity, v to be equal to 0 m/s and acceleration due to gravity to be -9.8 m/s while in the air before returning to the release point.
From equation of motion under free fall,
V = U + gt
t = 0.51 s
Force is equal to mass x acceleration. The heavyweight is packing both greater acceleration and mass than the tissue paper.
When his fist comes in contact with the paper, the tissue reacts by exerting its own opposite force, providing a tiny bit of resistance until the fist breaks it apart and passes through.
The fist, although by a a very tiny amount, is decelerated (slowed down) by the paper before it breaks through.
Answer:
True
Explanation:
Pauli exclusion principle states that in an atom, no two electrons have same set of the quantum numbers. The electrons in an atom have a unique set of quantum numbers ,
Even the electron is in same shell, same subshell and same orbital, the spin quantum number will be different for the two of them.
For example : 2 electrons in
n = 2 , l = 1 , m = 1 but s is different for both of them . (+1/2 or - 1/2)
Answer:
A devaluation occurs when a country makes a decision to lower its exchange rate in a fixed or semi-fixed exchange rate. A depreciation is when there is a fall in the value of a currency in a floating exchange rate.
To find the Mass of an object, you need to apply division.
Since Resultant Force = Mass X Acceleration
To find mass,
Mass = Force / Acceleration