Pa(Pascal) is the unit for ?

Deepika Singh Physics 10 Dec, 2017 66 views

Why Stars appears to move from east to west?

Deepika Singh Physics 10 Dec, 2017 82 views

How much Time Light takes to reachs us from from the Sun

Deepika Singh Physics 10 Dec, 2017 64 views

what is unit of light Year?

Deepika Singh Physics 10 Dec, 2017 66 views

in which unit Nuclear sizes are expressed ?

Deepika Singh Physics 10 Dec, 2017 83 views

the level of the liquid in the two vessels are at the same height

Deepika Singh Physics 10 Dec, 2017 186 views

How Radiocarbon is produced in the atmosphere.

Deepika Singh Physics 10 Dec, 2017 64 views

An external pressure P is applied on a cube at 0°C so that it is equally compressed from all sides. K is the bulk modulus of the material of the cube and

Devendra Yadav Physics 09 Dec, 2017 172 views

When a current of 5 mA is passed through a galvanometer having a coil of resistance 15Ω, it shows full scale deflection. The value of the resistance to be put in series with the galvanometer to convert it into a voltmeter of range 0 – 10V is?

Preeti Rai Physics 09 Dec, 2017 2298 views

Mrs. Rodger got a weekly raise of \$145. If she gets paid every other week, write an integer describing how the raise will affect her paycheck.

Arpita Singh Maths 09 Dec, 2017 312 views

A man grows into a giant such that his linear dimensions increase by a factor of 9. Assuming that his density remains same, the stress in the leg will change by a factor of?

Devendra Yadav Physics 09 Dec, 2017 119 views

For three events A, B and C, P(Exactly one of A or B occurs) = P(Exactly one of B or C occurs) = P (Exactly one of C or A occurs) = 1/ 4 and P(All the three events occur simultaneously) = 1 /16 . Then the probability that at least one of the events occurs, is?

Devendra Yadav Maths 08 Dec, 2017 68 views

3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is ?

Devendra Yadav Chemistry 08 Dec, 2017 633 views

The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are:

Preeti Rai Chemistry 08 Dec, 2017 418 views

The formation of which of the following polymers involves hydrolysis reaction?

Preeti Rai Chemistry 08 Dec, 2017 200 views

The most abundant elements by mass in the body of a healthy human adult are: Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all H atoms are replaced by 2H atoms is?

Devendra Yadav Physics 08 Dec, 2017 2265 views

A capacitance of 2 µF is required in an electrical circuit across a potential difference of 1.0 kV. A large number of 1 µF capacitors are available which can withstand a potential difference of not more than 300 V. The minimum number of capacitors required to achieve this is?

Devendra Yadav Physics 08 Dec, 2017 326 views

A time dependent force F = 6t acts on a particle of mass 1 kg. If the particle starts from rest, the work done by the force during the first 1 sec. will be?

Preeti Rai Physics 08 Dec, 2017 4604 views

In a Young’s double slit experiment, slits are separated by 0.5 mm, and the screen is placed 150 cm away. A beam of light consisting of two wavelengths, 650 nm and 520 nm, is used to obtain interference fringes on the screen. The least distance from the common central maximum to the point where the bright fringes due to both the wavelengths coincide is

Preeti Rai Physics 08 Dec, 2017 677 views

A copper ball of mass 100 gm is at a temperature T. It is dropped in a copper calorimeter of mass 100 gm, filled with 170 gm of water at room temperature. Subsequently, the temperature of the system is found to be 75 C. T is given by: (Given : room temperature = 30 C, specific heat of copper = 0.1 cal/gm C)

Preeti Rai Physics 08 Dec, 2017 227 views

If two different numbers are taken from the set {0, 1, 2, 3, …, 10}; then the probability that their sum as well as absolute difference are both multiple of 4, is:

Devendra Yadav Maths 07 Dec, 2017 301 views

For three events A, B and C, P(Exactly one of A or B occurs) = P(Exactly one of B or C occurs) = P (Exactly one of C or A occurs) = 1 /4 and P(All the three events occur simultaneously) = 1/ 16 . Then the probability that at least one of the events occurs, is:

Devendra Yadav Maths 07 Dec, 2017 1306 views

Two reactions R1 and R2 have identical pre exponential factors. Activation energy of R1 exceeds that of R2 by 10kj /mol. if k1 and k2 are rate constants R1 and R2 respectively at 300 K, then In (K2/K1) is equal to? Given (R=8.314 J/mol K)

Preeti Rai Chemistry 07 Dec, 2017 680 views

A metal crystallise is a face entered cubic structure. if the edge length of its unit cell is ‘a’, the closest approach between two atom in metallic crystal will be?

Devendra Yadav Chemistry 07 Dec, 2017 121 views

The fallowing observations were taken for determine surface tension T of water by capillary method: diameter of capillary, D = 1.25 * 10^-2 m rise of water, h = 1.45* 10^-2m Using g = 9.80 m/s^2 and the simplified relation T = rhg/2*10^3 N/m, the possible error in surface tension is closest to?

Devendra Yadav Physics 07 Dec, 2017 398 views

A resistance of 10^3 , a capacitance of 10^-6 F and an inductance of 2 Henry are connected in series with a source of 200 sin (1000 t) volt. Which of the following are correct?

Ashish Yadav Physics 07 Dec, 2017 362 views

A car is standing 200 m behind a truck which is also at rest.The two start moving at the same instant but the different forward accelerations.The truck has acceleration 2 m/s^2 and the car has acceleration 4m/s^2. The car will catch up with bus after a time?

Rahul Kumar Physics 12 Sep, 2017 1671 views

Calculate y=|x| if the The radius of a circle, having minimum area, which touches the curve y = 4 – x*x?

Rahul Kumar Maths 05 Sep, 2017 410 views

If 2x - y + 1 = 0 is a tangent to the hyperbola (x/a)*(x/a)-(y/4)*(y/4)=1,then what is the sides of a right angled triangle?

Preeti Rai Maths 04 Sep, 2017 480 views

Let a vertical tower AB have its end A on the level ground. Let C be the mid-point of AB and P be a point on the ground such that AP = 2AB. If angle BPC = β , then calculate value of tan β.

Rahul Kumar Maths 03 Sep, 2017 358 views

What will be the probability that at least one of the event occurs for three events A, B and C, P(Exactly one of A or B occurs) = P(Exactly one of B or C occurs) = P(Exactly one of C or A occurs) = 1/4 and P(All the three events occur simultaneously) = 1/16?

Anshul Kumar Singh Maths 02 Sep, 2017 1077 views

Let S = {1, 2, 3, ..... , 9}. For k = 1, 2, ....., 5, let NK be the number of subsets of S, each containing five elements out of which exactly k are odd. Then N1 + N2 + N3 + N4 + N5

Rahul Kumar Maths 02 Sep, 2017 897 views

What will be the beat frequency of the resulting signal in Hz if A stationary source emits sound of frequency f = 492 Hz. The sound is reflected by a large car approaching the source with a speed of 2 m/s. The reflected signal is received by the soruce and superposed with the original (Given that the speed of sound in air is 330 m/s and the car reflects the sound at the frequency it has received)?

Preeti Rai Physics 31 Aug, 2017 224 views

Calculate the length of the other edges if Cuboid with edge a=14 cm and body diagonal u=42 cm has volume V=10976 cm3?

Rahul Kumar Maths 30 Aug, 2017 64 views

How many m^2 of cardboard are needed to make the cuboid with dimensions 40 cm 60 cm and 20 cm?

Anshul Kumar Singh Maths 30 Aug, 2017 90 views

What is the equation of the plane passing through the point (1, 1, 1) and perpendicular to the planes 2x + y -2z = 5 and 3x-6y -2z = 7?

Anshul Kumar Singh Maths 29 Aug, 2017 238 views

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FIITJEE NOIDA General Science Science Maths Physics Chemistry Biology 29 Aug, 2017 100 views

What will be the value of T if A copper ball of mass 100 gm is at a temperature T. It is dropped in a copper calorimeter of mass 100 gm,filled with 170 gm of water at room temperature. Subsequently, the temperature of the system is found to be 750C. T is given by: (Given : room temperature = 300C, specific heat of copper = 0.1 cal/gm0C)?

Anshul Kumar Singh Physics 26 Aug, 2017 392 views

What will be the variance of the number of green balls drawn if A box contains 15 green and 10 yellow balls. If 10 balls are randomly drawn, one-by-one, with replacement?

Rahul Kumar Maths 22 Aug, 2017 94 views

A compound ‘X’ reacts with a compound ‘Y’, to produce a colourless and odourless gas. The gas turns lime water milky. When ‘X’ reacts with methanol in the presences of concentrated H2SO4, a sweet smelling substance is produced. The molecular formula of the compound ‘X’

Anshul Kumar Singh Chemistry 09 Aug, 2017 542 views

What is cuboid? What will be the real time examples of the cuboid.

Arpita Singh Maths 05 Aug, 2017 172 views

The following observations were taken for determining surface tension T of water by capillary method: diameter of capillary, D = 1.25 *10^-2m rise of water, h = 1.45 *10^2m Using g = 9.80 m/s2 and the simplified relation T = (rhg*10^)/2 N/ m, the possible error in surface tension is closest to?

Rahul Kumar Physics 04 Aug, 2017 220 views

What will be the variance of the number of green balls drawn is if A box contains 15 green and 10 yellow balls. If 10 balls are randomly drawn, one by one, with replacement?

Rahul Kumar Maths 03 Aug, 2017 139 views

What will be maximum area (in sq. m) of the flower-bed if Twenty meters of wire is available for fencing off a flower-bed in the form of a circular sector?

Rahul Kumar Maths 02 Aug, 2017 78 views

A rocket is launched normal to the surface of earth, away from the Sun, along the line joining the Sun and the Earth. The Sun is 3 *10^5 times heavier than the Earth and is at a distance 2.5 *10^4 times larger than the radius of the Earth. The escape velocity from Earth’s gravitational field is ve = 11.2 km /s The minimum initial (vs) required for the rocket to be able to leave the Sun-earth system is closest to(Ignore the rotation and revolution of the Earth and the presence of any other planet).

Rahul Kumar Physics 30 Jul, 2017 327 views

An electron in a hydrogen atom undergoes a transition from an orbit with quantum numebr ni to another with quantum number nf. Vi and Vf are respectively the initial and final potential energies of the electon. If vi/ vf =6.25, Then what is smallest possible nf is

Preeti Rai Chemistry 29 Jul, 2017 449 views