NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Romil Singh
Subject: Physics
, asked on 9/5/18
Q.23. Figure show a regular hexagon abcdef with o as centre. The correct expression about the hexagon is
Answer
1
Romil Singh
Subject: Physics
, asked on 9/5/18
Q.14. Vector
A
→
has magnitude 6 units and is in the direction of the + x - axis; vector
B
→
has magnitude 4 units and lies in the xy - plane, making an angle of 30
°
with the + x - axis and an angle of 60
°
with the + y - axis. Find the vector product
A
→
×
B
→
.
Answer
4
Atreya
Subject: Physics
, asked on 8/5/18
1st one fast!!!!
Answer
1
Romil Singh
Subject: Physics
, asked on 8/5/18
Solve this:
Q42. The sum and difference of two perpendicular vectors of equal lengths are
(A) of equal lengths and have an acute angle between them
(B) of equal length and have an obtuse angle between them
(C) also perpendicular to each other and are of different lengths
(D) also perpendicular to each other and are of equal lengths
Answer
1
Romil Singh
Subject: Physics
, asked on 8/5/18
Solve this:
22. I can run 90 m/s, 20% faster then my kid brother. How much head start (in time) should I gave him in order to have a tie race over 100 m ?
23. During shooting of a supper hit film. 'Mard' Amitabh Bachchan was waiting for his beloved 'Amrita Singh' with his dog. When he saw her approaching, the dog was exited and dashed to her, then back to his master and so on, never stopping. How far would you estimate the dog run if its speed is 30 km/ h and each of them walk at 4 km/h; starting 400 m
Answer
1
Romil Singh
Subject: Physics
, asked on 8/5/18
Q. Find the derivative
(vii) y =
x
2
+
1
x
-
5
(viii) y = (x + 1) (x + 2) (x + 3)
Answer
1
Sharaa Rizwan Khan
Subject: Physics
, asked on 5/5/18
Please help me with this question.
Q.8. State with reasons which of the following cannot possibly represent one dimensional motion of a particle.
(a)
(b)
(c)
(d)
Answer
1
Sharaa Rizwan Khan
Subject: Physics
, asked on 5/5/18
Please help me with this question.
Q.8. State with reasons which of the following cannot possibly represent one dimensional motion of a particle.
(a)
(b)
(c)
(d)
Answer
2
Dev Puri
Subject: Physics
, asked on 5/5/18
Explaim the motion of the object at each time interval for the following graph:
Answer
1
Dev Puri
Subject: Physics
, asked on 5/5/18
Solve this :
Q.
For the position time graph given below plot a corresponding velocity time graph.Also explain the steps of plotting.
Answer
1
Souhardya Mazumdar
Subject: Physics
, asked on 3/5/18
If the resultant vector of vector A and vector B is vector 2A then what will be the angle between the resultant vector and vector A? Please answer with proper reason.
Answer
1
Souhardya Mazumdar
Subject: Physics
, asked on 3/5/18
Please solve question no. 15&16 with proper explanation
Q15. The magnitude of the resultant of (A + B) and (A – B) is
(a) 2A (b) 2B
(c)
A
2
+
B
2
(d)
A
2
-
B
2
Q16. In Q.15, what is the angle between the resultant vector and vector A?
(a) zero (b) cos
–1
A
B
(c) cos
–1
B
A
(d) cos
–1
A
-
B
A
+
B
Answer
1
Aviral
Subject: Physics
, asked on 1/5/18
Solve this :
Q
.
A
partice
undergoing
uniformly
accelrates
motion
.
It
is
given
that
it
undergoes
equal
displacements
in
successive
time
intervals
t
1
,
t
2
,
t
3
.
Prove
that
:
1
t
1
-
1
t
2
+
1
t
3
=
3
t
1
+
t
2
+
t
3
Answer
1
Akash
Subject: Physics
, asked on 27/4/18
The time period of a simple pendulum
T=2??l/?g
Measured value of l=20cm known to one millimetre accuracy. The time period for one hundred oscillation is found to be 90 seconds. Using a wrist watch of 1 second resolution. What is the accuracy determining g?
Answer
1
Akash
Subject: Physics
, asked on 27/4/18
Find the relative error in Z if:
Z=(A^4.B^1/3)/(C.D^3/2)
Answer
2
Prev
3
4
5
6
7
Next
What are you looking for?
Q42. The sum and difference of two perpendicular vectors of equal lengths are
(A) of equal lengths and have an acute angle between them
(B) of equal length and have an obtuse angle between them
(C) also perpendicular to each other and are of different lengths
(D) also perpendicular to each other and are of equal lengths
22. I can run 90 m/s, 20% faster then my kid brother. How much head start (in time) should I gave him in order to have a tie race over 100 m ?
23. During shooting of a supper hit film. 'Mard' Amitabh Bachchan was waiting for his beloved 'Amrita Singh' with his dog. When he saw her approaching, the dog was exited and dashed to her, then back to his master and so on, never stopping. How far would you estimate the dog run if its speed is 30 km/ h and each of them walk at 4 km/h; starting 400 m
(vii) y =
(viii) y = (x + 1) (x + 2) (x + 3)
Q.8. State with reasons which of the following cannot possibly represent one dimensional motion of a particle.
(a)
(b)
(c)
(d)
Q.8. State with reasons which of the following cannot possibly represent one dimensional motion of a particle.
(a)
(b)
(c)
(d)
Q. For the position time graph given below plot a corresponding velocity time graph.Also explain the steps of plotting.
Q15. The magnitude of the resultant of (A + B) and (A – B) is
(a) 2A (b) 2B
(c) (d)
Q16. In Q.15, what is the angle between the resultant vector and vector A?
(a) zero (b) cos–1
(c) cos–1 (d) cos–1
T=2??l/?g
Measured value of l=20cm known to one millimetre accuracy. The time period for one hundred oscillation is found to be 90 seconds. Using a wrist watch of 1 second resolution. What is the accuracy determining g?
Z=(A^4.B^1/3)/(C.D^3/2)