How many organisms in the list given below show autotrophic nutrition method? Lactobacillus,Nostoc,Chara,Wolffia,Nitrosomonas,Nitrobacter,Porphyra,Streptococcus,Saccharomyces,Trypanosoma.

The values of a function $f(x)$ at different values of $x$ are given in the table below:

$x$	$0$	$1$	$2$	$3$	$4$	$5$
$f(x)$	$2$	$3$	$6$	$11$	$18$	$27$

Then,the approximate area (in square units) bounded by the curve $y=f(x)$ and the $x$-axis between $x=0$ and $x=5$,using the Trapezoidal rule,is

What is the $IUPAC$ name of the following compound?

In a permanent magnet at room temperature,

The velocity $v$ reached by a car of mass $m$ at a certain distance from the starting point,driven with constant power $P$,is such that:

In the half-wave rectifier circuit shown,which one of the following waveforms is true for $V_{CD}$,the output across $C$ and $D$?