MHT-CET PCB 01 — MHT - CET STD 12 Science — Question

The potential energy of a particle executing S.H.M is 2.5 J, when its displacement is half of amplitude. The total energy of the particle is ______.

The length of the perpendicular from the origin on the line `(xsinalpha)/"b" - (ycosalpha)/"a" - 1 = 0` is ______.

At extreme positions of a particle executing simple harmonic motion, ______

Match the two columns and select the right one among options given.

	Column - I		Column - II
i.	Duodenum	a.	A cartilaginous flap
ii.	Epiglottis	b.	Blind sac present at the junction of ileum and colon
iii.	Glottis	c.	'U' shaped structure emerging from the stomach
iv.	Caecum	d.	Opening of pharynx into trachea

Due to which of the following reason lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled?

When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained is ________.

The monitoring stations, established by NEERI, have reported that Kolkata and New Delhi have highest ____________ and ____________ in air respectively.

The pharynx opens into trachea through an opening called ______ guarded by a cartilaginous flap called ______.

In fundamental mode, the time required for the sound wave to reach up to the closed end of a pipe filled with air is 't' second. The frequency of vibration of the air column is ______