Question
When diamond is heated at more than 1500 Degree Celsius
in the absence of air, then it turns to………….?Solution
Diamond is a crystal modification of carbon. Heating diamond to about 900 degrees Celsius in the presence of air, diamond will burn into CO₂ whereas heating it to 1500 degrees C in the absence of air, it turns into graphite.
A solid non-conducting sphere of radius R carries a uniform volume charge density ρ. What is the ratio of electric field at r = R (surface) to that at ...
In a diatomic gas at ordinary temperatures, how many degrees of freedom contribute to internal energy?
What is the maximum value of deforming force upto which a material shows elastic property and above which the material loses it?
An object is placed at a distance of 10 cm in front of a double convex lens made of glass of refractive index 1.5. Both the radii of curvature of the le...
An object of mass ‘m’ be made to fall freely from a height ‘h’. At the start the potential energy is _____ and kinetic energy is ______.
...A stream of water flowing horizontally with a speed of 20 m/s pushes out of a tube of cross-sectional area 10-1m2 and hits at a v...
A dipole with moment p = 2i + 3j - 4k is placed at A(2, −3, 1). Find the electric potential at point B(4, −1, 0) in volts. (Use 1/(4 π ε0) = 9 × ...
Clear nights are colder than cloudy nights because of –
A constant retarding force of 60 N is applied to a body of mass 25 kg moving initially with a speed of 12 m s–1. How long does the body...
A beam of light consisting of two wavelengths, 600 nm and 420 nm, is used to obtain interference fringes in a Young’s double-slit experiment. Find...
Relevant for Exams:
