Two balls are dropped to the ground from different heights. One ball is dropped 2s after the other but they both strike the ground at the same time. If the first ball takes 5s to reach the ground, then the difference in initial heights is (g = 10 ms–2) 40

16. A train covers a distance of 90km at a uniform speed. Had the speed been 15km/hr more, it would have taken half an hour / hr for the journey. What will be the original Speed of the train.

15. In a two digit number, the sum of the digits is 13. If the number is subtracted from the one obtained by inter changing the result is 45. Find the number.

What will be current through electric iron if an electric iron rated as 800W, 200V operating at the voltage of 100V?

What will be energy of an alfa particle when it is accelerated by a potential difference of 3V?

Number of electrons to be put on a spherical conductor of radius 0.1 m to produce an electric field of 0.036N/C just above its surface is

An Athletic completes one round of a circular track of radius 2.5 m in 12 sec. What will be the magnitude of displacement (in meter) at the end of 54 sec.

## What will be the relative rates of diffusion between CH4 and SO2? (Mol. mass of SO2 = 64 & CH4 = 16)

What will be the relative rates of diffusion between CH4 and SO2? (Mol. mass of SO2 = 64 & CH4 = 16)

Find the volume of a pyramid whose base is a square with side lengths of 10 m and height 9 m.

How many edges faces and vertices are on a cone?

What type of pyramid has four faces?

What is the edge of a cube?

What is a square based pyramid?

How many vertices are in a pyramid?

What is the number of vertices in a pyramid with 10 faces?

What is the rate of acceleration of gravity?

Mr. Sharma and Mr. Arora are family friends and they decided to go for a trip with family . For the trio they reserved their rail tickets . Mr. Arora has not taken a half ticket for his child who is 6 years old where as Mr, Sharma has taken half tickets for his two children who are 6 year and 8.5 year.A railway half ticket costs half of the full fare but the reservation charges are the same as on a FULL TICKET. MR AND MRS ARORA PAID 1700,WHILE MR AND MRS SHARMA PAID 2700. Find the full share of one ticket and reservation charges per ticket.

Can the number n ^6,n being a natural number ,end with the digit 5? Give reasons.

A man has certain note of denomination 20 and 5 which amount to 380 . If the number of notes of each kind are interchanged,they amount to 60 less than before . Find the number of notes of each denomination.

Explain with a suitable diagram

Explain why sodium is more reactive than lithium.

What is the matrix and what is the use of it? What are the types and how it works?

What is hysteresis loss? Where does the loss actually occur?

What is Atom? What is Mass? What is difference between both?

What is th formula of sodium sesquicarbonate, which is used for wool washing

What is Distance and displacement calculation? What is the difference between both of you.

What is the difference between Active and Passive Voice sentences? Please help me with examples!

What is the meaning of microvascular niche? What does niche refer to in biology?

What is ascent of sap?

Name the largest blood vessel in the human body

What compound is Plaster of Paris? How is it prepared? What happens when it is mixed with water and allowed to stand? Mention two applications of this property of Plaster of Paris

Write one equation each for decomposition reactions where energy is supplied in the form of heat, light or electricity.

Define exothermic and endothermic reactions? Give examples.

Why should a magnesium ribbon be cleaned before burning in air?

Please explain me Kinetic Energy and what will happened when we increase the speed then what will be the kinetic energy of the moving body