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Why is it dangerous to stand in the upper deck of a double decker bus?
Why is it dangerous to stand in the upper deck of a double decker bus?
Asked Sona
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Resistance and Resistivity
Simran Asked
“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”
Answer:
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
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Amateur Research
Ask Physics is looking for students from Kendriya Vidyalayas of Kerala who are interested in doing Research in any branch of Science.
If interested, Use the link below to express your interest.
You will be contacted by the concerned official.
Click Here to express your interest.
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Optics
Rajat asked:
“when we exchange the lenses of compound microscope, then why it does not act as a telescope?”
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Sequence of Learning Physics
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
Answer:
It is better to follow the same pattern as given in NCERT text book
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Problem from Kinematics
The speed of a train changes from36km/h to 72km/h in 10sec. calculate the distance travelled during this time
Answer:
u=36km/h = 10 m/s
v=72 km/h=20 m/s
t=10 s
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
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The “Pulling Power” of flame
I would like to ask : does flame has its own pulling power ? e.g. when we blow out a candle , the wick often seems to be goin with the blow . is it coz of our blow or is it the flame carrying it along with itself ? (Bikramjit Singh asks)
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Physics Masters
Vivek Sawhney
AskPhysics Q&A
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