If $f:[2,3] \rightarrow R$ is defined by $f(x)=x^3+3x-2$, then the range of $f(x)$ is contained in the interval

The voltage of an $ac$ source varies with time according to the equation $V = 100 \sin(100 \pi t) \cos(100 \pi t)$,where $t$ is in $seconds$ and $V$ is in $volts$. Then:

The load versus elongation graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line

Which of the following $0.05 \, M$ aqueous solution will have the lowest freezing point?

Five elements $A, B, C, D$ and $E$ have work functions $1.2 \ eV, 2.4 \ eV, 3.6 \ eV, 4.8 \ eV$ and $6 \ eV$ respectively. If light of wavelength $4000 \ \mathring{A}$ is allowed to fall on these elements,then photoelectrons are emitted by:

The uncertainty in the location of a circulating electron is equal to its de-Broglie wavelength. The minimum percentage error in the measurement of its velocity under these circumstances will be approximately: