Recently Active Class Vii X Physics Questions

Does earth do any work while moving in its orbit? ...

why can't light escape from a blackhole ...

can alpha and beta decay occur in a same molecule(radioactive needless to say)? ...

A body with uniform acceleration covers 76 m in the 5th sec and 116 m in the 10th sec. Find the distance travelled in the 15th second.What is the distance travelled in next 5 seconds? ...

What is the difference between magnetic flux and magnetic field? ...

Please explain- i) How do the electrons get accelearted in a hot Cathode Ray Tube? ii) What is the utility of the "control grid" in the Cathode Ray Tube? ...

If the acceleration of an object is zero, are no forces acting on it? Explain. ...

When an electric cell is connected to a circuit, electrons flow away from the negative terminal in the circuit. But within the cell, electrons flow to the negative terminal. Explain. ...

Electric power is transferred over large distances at very high voltages. Explain how the high voltage reduces power losses in the transmission lines. ...

Can the normal force on an object ever do work? Explain ...

Can an object have zero velocity and nonzero acceleration at the same time? Give examples. ...

What happens when a light bulb burns out? ...

We know friction occurs due to irregularities at molecular level,what is the origin of normal reaction between the surfaces? ...

What would your bathroom scale read if you weighed yourself on an inclined plane? ...

An object weighs 7.84 N when it is in air and 6.86 N when it is immersed in water. What is the specific gravity of the object? ...

A uniform meter scale balances at the 40 cm mark when weights of 10 g and 20 g are suspended from the 10 cm and 20 cm marks. The weight of the metre scale is ...

Can work be done on a system if there is no motion? ...

The type of energy possessed by a simple pendulum, when it is at the mean position is ...

The angle of elevation of the sun, when the shadow of the pole is sqrt{3} times the height of the pole, is ...

A house subtends a right angle at the window of an opposite house and the angle of elevation of the window; from the bottom of the first house is 60o. If the distance between the two houses be 6 meters, then the height of the ...

Which of the following is not a unit of pressure? ...

In the following reaction, identify the products Na2CO3(aq) + 2HCl(aq) → _________________ ...

You drop a stone into a deep well and hear the splash 2.5 s later. How deep is the well? (Ignore air resistance, and assume the velocity of sound is 340 m/s.) ...

If you walk 5.0 m horizontally forward at a constant velocity carrying a 10-N object, the amount of work you do is  ...

1) Is work done by a force only when force and displacement are parallel to each other? 2) A man is lifting a body vertically upward? What are the forces acting on the body? What is the sign of work done by these forces? ...

A piece of ice is floating in a glass filled with water .How will the level if water change as the ice melts ? ...

If coefficient of friction is 2/sqrt(3). What is the force of friction acting? ...

*Image* The large block m1 is 10 kg, and the smaller block m2 is 1 kg. The applied force, F is 33 N.Find contact force between the two bodies (in newtons) ...

Normal reaction = ...

Supposing surface is frictionless, acceleration = ...