Which of the following statements is INCORRECT?
ABrain controls all the body parts through nerves.
BWhen we breathe in air, the lungs increase in size.
CSimilar cells join together to form organs.
DReproductive system of men is different from women.
Which of the following shows an arrangement of particles in a matter filled inside the football?
does anybody know how to do this
What is the position of point R with respect to point T in the given grid?
ANorth - East
BNorth - West
CSouth - East
DSouth - West
By using a concave mirror, image of a tree is focused on a screen. The distance between the screen and the mirror is
(a) Equal to twice the focal length of the concave mirror.
(b) Equal to one fourth of the focal length of the concave mirror.
(c) Equal to half the radius of curvature of the concave mirror.
(d) Equal to the radius of curvature of the concave mirror.
Prerna has 4 containers of the same size and thickness. They are made of different materials such as plastic, steel, styrofoam and glass. She poured the same amount of water at 90°C and placed a thermometer into each container. All the containers were placed in a room with the same conditions.
After 20 minutes, which of the following could Prerna observe?
1. All the thermometers will show the same temperature.
2. All the thermometers will show different temperature.
3. The thermometer in the steel container will show the least drop in temperature.
4. The thermometer in the styrofoam cup will show the highest temperature.
(a) 1 only
(b) 2 and 3
(c) 3 and 4
(d) 2 and 4
The diagram shows an object O viewed using two mirrors. A person looks into the mirrors as shown. At which position is the image of O seen?
pls explain me this