Daily NEET MCQ- August 5, 2022 - NEET MCQ

ABomb calorimeter works at constant volume, so it is isochoric in nature. Here, the heat energy that’s measured is only the internal energy. The work done is zero because of no change in volume.

The non-zero digits and any zeros between them are all significant. Leading zeros are not significant. Counting all the significant digits gives us 2.

1.2 x 3.91 = 4.692. Since 1.2 has two significant figures, the result should not have more than two significant figures, thus, it is 4.7. As per the rules of significant figures, the resultant answer should not have more significant figures the number with a less significant figured number.

Average speed is defined as total distance divided by total time. The total distance is 150 km and total time taken is 3 Hrs, therefore average speed = 150/3 = 50 km/hr.

Average speed is the total distance divided by total time taken. Total displacement (d = vt) = 20×20 + 15×10 + 10×5 = 600 m. Total time = 20 + 10 + 5 = 35 s. Therefore, average speed = 600/35 = 17.14 m/s.

From first equation of motion we have, v = u + at, which implies that a = 5 m/s². From second equation of motion we have s = ut + (1/2)at², which implies that s = 40 m. Average speed = s/t = 40/4 = 10 m/s.

In cockroach, the thorax is divided into three parts – prothorax, mesothorax and metathorax. Apart from the thorax, the cockroach also possesses a triangular anterior head and an abdomen.

The labrum is the upper lip of the cockroach. The labium is the lower lip of the cockroach. The cockroach has six mouth parts – a labium, a labrum, a hypopharynx, a pair of mandibles and a pair of maxillae.

 Cockroaches have two antennae, that is, one pair of antennae. They have sensory receptors to help assess the surrounding environment. The antennae are present in the head region and arise from membranous sockets in front of the eyes.

The exoskeleton of cockroach is made of chitin. It is a polysaccharide. Chitin is fibrous in nature and it is the main component of the exoskeletons of Arthropods as well as the cell walls of fungi.