The given figure shows a light bulb connected to a cell. Which of the following shows the energy changes that take place when a bulb glows?
AChemical energy → electrical energy → heat energy → light energy
BChemical energy → electrical energy → light energy → heat energy
CElectrical energy → chemical energy → light energy → heat energy
DElectrical energy → chemical energy → heat energy → light energy
Read the statements carefully and mark the correct option.
Statement 1 : Specific heat capacity is the cause of formation of land and sea breeze.
Statement 2 : The specific heat of water is more than land.
(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
(B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
(C) Statement 1 is true and statement 2 is false.
(D) Both statements 1 and 2 are false.
I believe the answer is A. The specific heat capacity difference between land and water results in land and sea breezes. Water has a high specific heat capacity, so to raise one unit of mass by 1degree celsius it takes more heat than land which has a relatively low specific heat capacity. Both land and sea get the same amount of sunlight( heat) so water takes more time to raise its temperature than land does. This results in breezes with further logic as you know.
Study the given table and select the incorrect option
regarding P, Q, R and S.
A P could be an animal that has six legs, is oviparous and has many stages in its life cycle.
B Q and S are warm blooded animals where Q is always oviparous and lacks teeth whereas S may be viviparous and possesses teeth.
C R could be a cold blooded, oviparous, aquatic animal like seal or arowana.
D P could be moth, Q could be nightingale, R could be Scoliodon and S could be pangolin.
Which one of the following will produce the sound with the lowest pitch, when you blow across the mouth of the test tube?
Was it a class v question?
Symptoms of two diseases are given.
I. Swollen, bleeding gums, loose teeth and aching joints.
II. The patient looks pale, gets tired quickly and suffers from loss of appetite.
Identify the two diseases from the given symptoms, and select the correct option.
AI. Pellagra, II. Beri beri
BI. Scurvy, II. Rickets
CI. Beri beri, II. Scurvy
DI. Scurvy, II. Anaemia
FIRST=symptoms of scurvy,caused by lack of vitamin CSECOND=symptoms of anaemia ,caused by lack of ironbye.
Read the given statements and select the correct option.
Statement 1: Forests prevent soil erosion.
Statement 2 : Canopy formed by crown of leaves of forest trees reduces the force and speed of raindrops.
A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true but statement 2 is false.
D Both statements 1 and 2 are false.
A few changes are given as:
I. Deflating of a cycle tyre tube
II. Chopping of potato
III. Melting of wax
IV. The burning of wood
Which of the following statements is incorrect regarding these changes?
AI and IV are reversible physical changes.
BII and IV are irreversible chemical changes.
CII and III are irreversible physical changes.
DAll of these
All of these are right ,so answer is D