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
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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
.
coordinate of centre of mass isPosition 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.
coordinate of centre of mass isPosition vector of centre of mass is
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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
(i)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
(i)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.
, 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.
, 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, 
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., 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.
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.
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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