2/9°C
4/9°C
9/4°C
9/2°C
Correct answer is B
Energy at the height = mgh
This energy is converted to heat energy - mcΔt
∴ From the principle of energy conversion,
mcΔt = mgh
m x 450 x Δt = m x 10 x 20
∴ Δt = m x 10 x 20/(m x 450)
= 200/450
= 4/9°C
A 12\(\Omega\) resistor dissipates 8kJ of heat in 20s. Calculate the current through the resistor...
Radiocarbon dating technique is used to estimate the age of ...
An a.c. generator can be converted into a d.c. generator by replacing ...
For a rough inclined plane on which lies a body of weight W, the angle θ in the diagram above ...
The main reason why a.c. is transmitted at very high voltage and low current is that ...
The carbon-granules microphone works on the principle of change in ...
A regular spacing or arrangement of atoms in a crystalline material is called ...
When table salt is added to ice, the melting point of the ice ...
The area under the curve of a velocity time graph represents ...