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Why is it dangerous to stand in the upper deck of a double decker bus?
“Two wires A and B of equal lengths,different cross-sectional areas and made of same metal a)name the property which is same for both the wires. b)name the property which is different for both the wires”
Since both the wires are of same metal, the resistivity will be same for both whereas since the dimensions (Area of cross section here) are different, the resistance will be different
“when we exchange the lenses of compound microscope, then why it does not act as a telescope?”
In what sequence should these chapters be prepared for my exams:-
units and dimensions,kinematics,laws of motion,work power and energy,motion of system of particles and rigid body dynamics,gravitation.
Apoorv Katoch asked
It is better to follow the same pattern as given in NCERT text book
The speed of a train changes from36km/h to 72km/h in 10sec. calculate the distance travelled during this time
u=36km/h = 10 m/s
v=72 km/h=20 m/s
use v = u+ at to find a
a = 1 m/s2
Use v2-u2=2aS to find S
S = (400-100)/2 = 150 m