K.E=0.5*mv²
v=square root 2ke/m
v= square root 2*8J/1 kg
v= 4 m/s
Answer:
The speed of the vehicle changes in each second is, v = 0.00111 Km/h
Explanation:
Given,
The acceleration of the vehicle, a = 4 Km/h²
Converting it into m/s,
a = 0.0003086 m/s²
In each second the vehicle covers 0.0003086 m
The speed of the vehicle in each second is given by 0.0003086 m/s
Converting it into Km/h
v = 0.00111 Km/h
Therefore, the speed of the vehicle changes in each second is, v = 0.00111 Km/h
Answer:
Matching of Part A with Part B
Rutherford ------------ discovered proton nucleus
Bohr----------------------postulated the quantum atom
Dalton-------------------Father of atomic theory
Chadwick --------------discovery of neutron
J.J. Thomson----------discovered the electrons
hence , the matching will be
2 -- d
3 -- e
4 -- b
5 -- a
6 -- c
Answer:
The length is 
and the angle is 
Explanation:
The period 
of the pendulum is related to its length 
by
where 
is the acceleration due to gravity.
Solving for we get
putting in 
and we get:
There are two forces acting on the pendulum: The gravitational force 
and the 
student's force. Therefore, the angular displacement 
that these forces give is
putting in 
, 
, and we get
C) the sun
all the mass of the solar nebula became the Sun
