$A$ point object is placed at a distance of $30 \, cm$ from a convex mirror of focal length $30 \, cm$. The image will form at

Which of the following is the correct electronic configuration of $Cu$ (atomic number $29$)?

Which of the following $statement(s)$ is/are correct?
$(i)$ All living organisms have the ability to respond to environmental stimuli,which could be physical,chemical,or biological.
$(ii)$ Plants respond to external factors like light,water,temperature,other organisms,pollutants,etc.
$(iii)$ Photoperiod affects the process of reproduction.
$(iv)$ Human being is the only organism who has self-consciousness.

If the circle $x^2+y^2+6x-2y+k=0$ bisects the circumference of the circle $x^2+y^2+2x-6y-15=0$,then $k$ is equal to :

Which kingdom consists of organisms that are multicellular,aquatic or terrestrial,heterotrophic,and eukaryotic?

Condenser $A$ has a capacity of $15 \mu F$ when it is filled with a medium of dielectric constant $15$. Another condenser $B$ has a capacity of $1 \mu F$ with air between the plates. Both are charged separately by a battery of $100 V$. After charging,both are connected in parallel without the battery and the dielectric material being removed from condenser $A$. The common potential now is.......$V$