A piece of rubber 1 Dem long stretches 6mm when a load of 100N is hung from it. What is the area stretched if the young modulus is 50N/m² .
To determine the weight of an object you would ____.
A gas at pressure PN/m and temperature 27°c is heated to 77°c at constant volume. The new pressure is _____
Two lamp rated 40w and 220w, each are connected in series. The total power dissipated in both lamps is _____.
A magnet is moved through a coil of wire. The emf produced in the wire depends on _____.
A potential difference of 6v is used to produce a current of 5A for 200s through a heating coil. The heat produced is ______.
Two boys are communicating with each other by stretching a string passing through a hole punched in the bottom of each of the two tin cans. The physical principle employed is that sound travels
The hatch door of a submarine has an area of 0.5 m². The specific gravity of seawater is 1.03. Assume that g = 10m/s² and neglect the atmospheric pressure. The force exerted by the sea water on the hatch door at a depth of 200m is
When equal weights of iron and water are subjected loan equal supply of heat, it is found that the piece of iron becomes much hotter than water after a short time because ____.
The speed of light in is 3.0×10'8 m/s. Its speed in glass having a refractive index of 1.65 is ______.
The slope of a straight-line displacement time graph indicates ____.
A ball of mass 0.5kg moving at 10m/s collides with another ball of equal mass at rest. If the two balls move off together after the impart, calculate their common velocity
How much heat is given out when a piece of iron mass 50g and specific heat capacity 460Jkg-¹K -¹ cools from 85°c to 25°c?
Which of the following is not a suitable method of reducing loss of heat from a piece of hot iron?
A bat emits a sound wave at a speed of 1650.00m/s and receives the echo 0.15s later. Calculate the distance of the bat from the reflector
Which of the following is/are characteristics of sound?
An image which can be formed on a screen is said to be _____.
A ray of light is incident at an angle of 30° on a glass prism of refractive index 1.5. Calculate the angle through which the ray is minimally deviated in the prism (the medium surrounding the prism is air)
At which of the following distances from the lens should a s Ii de be placed in a slide projector if the focal length of the projection lens?
What of the camera corresponds to the iris of the eye?