Physics-
Trajectories of two projectiles are shown in figure. Let
and
be the time periods and
and
their speeds of projection. Then<
Physics-General
Answer:The correct answer is:
Maximum height and time of flight depend on the vertical component of initial velocity

Here 
Range 


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physics-
A point P moves in counter-clockwise direction on a circular path as shown in the figure. The movement of P is such that it sweeps out length
where
is in metre and t is in second. The radius of the path is 20 m. The acceleration of P when t =2s is nearly

A point P moves in counter-clockwise direction on a circular path as shown in the figure. The movement of P is such that it sweeps out length
where
is in metre and t is in second. The radius of the path is 20 m. The acceleration of P when t =2s is nearly

physics-General
chemistry-
DS for the reaction: MgCO3(s) → MgO(s) + CO2(g) will be -
DS for the reaction: MgCO3(s) → MgO(s) + CO2(g) will be -
chemistry-General
chemistry-
For the reaction N2(g)+3H2(g)→2NH3(g),DH is-
For the reaction N2(g)+3H2(g)→2NH3(g),DH is-
chemistry-General
physics-
Three identical spheres of mass
each are placed at the corners of an equilateral triangle of side 2
. Taking one of the corner as the origin, the position vector of the centre of mass is
The
coordinate of centre of mass is





Position vector of centre of mass is
.
Position vector of centre of mass is
Three identical spheres of mass
each are placed at the corners of an equilateral triangle of side 2
. Taking one of the corner as the origin, the position vector of the centre of mass is
physics-General
The
coordinate of centre of mass is





Position vector of centre of mass is
.
Position vector of centre of mass is
physics-
Four bodies of equal mass start moving with same speed are shown in the figure. In which of the following combination the centre of mass will remain at origin?

Four bodies of equal mass start moving with same speed are shown in the figure. In which of the following combination the centre of mass will remain at origin?

physics-General
maths-
A square matrix
for
and
(constant) for
is called a
A square matrix
for
and
(constant) for
is called a
maths-General
chemistry-
From the reactions: C(s)+2H2(g)→CH4(g)DH=–XK cal C(g)+4H(g)→CH4(g),DH=–X1Kcal CH4(g)→CH3(g)+H(g)DH=+Y(Kcal) Bond energy of C–H bond is-
From the reactions: C(s)+2H2(g)→CH4(g)DH=–XK cal C(g)+4H(g)→CH4(g),DH=–X1Kcal CH4(g)→CH3(g)+H(g)DH=+Y(Kcal) Bond energy of C–H bond is-
chemistry-General
physics-
A man 80 kg is supported by two cables as shown in the figure. Then the ratio of tensions
and
is

From figure in equilibrium position

or
or

or
or

A man 80 kg is supported by two cables as shown in the figure. Then the ratio of tensions
and
is

physics-General
From figure in equilibrium position

or
or

or
or

physics-
A weightless thread can bear tension up to
wt. A stone of mass
is tied to it and revolved in a circular path of radius
in a vertical plane. If
, then the maximum angular velocity of the stone will be
Max. tension that string can bear 
Tension at lowest point of vertical loop


Tension at lowest point of vertical loop
A weightless thread can bear tension up to
wt. A stone of mass
is tied to it and revolved in a circular path of radius
in a vertical plane. If
, then the maximum angular velocity of the stone will be
physics-General
Max. tension that string can bear 
Tension at lowest point of vertical loop


Tension at lowest point of vertical loop
physics-
From a circular disc of radius
and mass 9
, a small disc of radius
/3 is removed from the disc. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through
is

or
Here,
Substituting in Eq. (i), we have
From a circular disc of radius
and mass 9
, a small disc of radius
/3 is removed from the disc. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through
is

physics-General
or
Here,
Substituting in Eq. (i), we have
physics-
The instantaneous velocity of a point
of the given rod of length 0.5 m is 3
in the represented direction. The angular velocity of the rod for minimum velocity of end A is

If rod is rotated about end
, then vertical component of velocity
of end
will be zero.


The instantaneous velocity of a point
of the given rod of length 0.5 m is 3
in the represented direction. The angular velocity of the rod for minimum velocity of end A is

physics-General
If rod is rotated about end
, then vertical component of velocity
of end
will be zero.


biology
The backbone of RNA consists of which of the following sugar?
Each spindle is a bipolar fibrous structure composed mainly of microtubules. The spindle fibres are mainly composed of tubulin protein.
The backbone of RNA consists of which of the following sugar?
biologyGeneral
Each spindle is a bipolar fibrous structure composed mainly of microtubules. The spindle fibres are mainly composed of tubulin protein.
biology
Consider the following statements and choose the correct one
In protoplasm, fat store in the form oftriglycerides. Polypeptides, polysaccharides and nucleoside are proteins, carbohydrates ad nucleic acid, respectively
Consider the following statements and choose the correct one
biologyGeneral
In protoplasm, fat store in the form oftriglycerides. Polypeptides, polysaccharides and nucleoside are proteins, carbohydrates ad nucleic acid, respectively
biology
Identify A to F in the sectional view of a chloroplast showing the different parts

70 S ribosomes are found in prokaryotes,
bacteria and blue green algae. The 70 S ribosomes have 2 subunits,
., 50 S and 30 S. The ribosomes of mitochondria are small
., 55-60 S type, which are comparable to 70 S than 80 S type.
Identify A to F in the sectional view of a chloroplast showing the different parts

biologyGeneral
70 S ribosomes are found in prokaryotes,
bacteria and blue green algae. The 70 S ribosomes have 2 subunits,
., 50 S and 30 S. The ribosomes of mitochondria are small
., 55-60 S type, which are comparable to 70 S than 80 S type.
biology
Organelle important in spindle formation during nuclear division is
DNA multiplication or duplication of DNA takes place by replication. It takes place during S-phase of interphase in cell-cycle
Organelle important in spindle formation during nuclear division is
biologyGeneral
DNA multiplication or duplication of DNA takes place by replication. It takes place during S-phase of interphase in cell-cycle