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Sphygmomanometer

Correct answer is: (C) 1:16

No, it should be modified to take into account the word done against viscous drag.

1. Left atrium 

2. Tricuspid valve 

3. Bicuspid valve

4. Right ventricle 

5. Pulmonary artery

Since spleen stores blood in small quantities, it is also known as the blood bank of the body.

Vein carries blood to the heart

Specific gravity, strain angle.

A vogadro's number is a dimensionless constant.

Correct answer is: (D) energy

(a) Nitro benzene

Small arteries spilt into Capillaries

Initiation of the contraction and relaxation of the heart and regulation of the heartbeat are carried out by the special muscles of SinoArtial Node (SA node) at the anterior part of the right atrium. This part is called pacemaker.

Data : r = 4 cm = 4 × 10^-2 m, T = 25 × 10^-3 N/m

Initial surface area of soap bubble = 0 

Final surface area of soap bubble = 2 × 4πr² 

Increase in surface area = 2 × 4πr ² 

The work done = surface tension x increase in surface area 

= T × 2 × 4πr²

= 25 × 10^-3 × 2 × 4 × 3.142 × (4 × 10^-2)²

= 1.005 × 10^-3 J

Destruction of germs and inactive red blood cells is the main function of spleen.

Work done = 8πr²T

Data : r = 4 cm = 4 × 10^-2 m, T = 25 × 10^-3 N/m

Initial surface area of soap bubble = 0 

Final surface area of soap bubble = 2 × 4πr²

∴ Increase in surface area = 2 × 4πr² 

The work done

 = surface tension × increase in surface area 

= T × 2 × 4πr²

= 25 × 10^-3 × 2 × 4 × 3.142 × (4 × 10^-2)²

= 1.005 × 10^-3 J

The work done = 0.07 × 8 × 3.142 × (2 × 10^-2)²

= 7.038 × 10^-4 J

Conservation of energy.

For better wettability (surface coverage), the surface tension and angle of contact of paints and lubricating oils must below.

Water help free bowel movements in stomach and intestines.

Capillaries unite to form is Small veins

Pericardial fluid is filled in between the pericardial membranes. Its main function is to reduce friction between the membranes during the heartbeats.

Spleen is the largest organ in the Lymphatic system.

Pulmonary valve, Tricuspid valve, Aortic valve, Bicuspid valve.

vein carries blood to the heart

Let T be the surface tension of a soap solution. The initial surface area of soap bubble = 0

The final surface area of soap bubble = 2 × 4πr²

∴ The increase in surface area = 2 × 4πr² The work done in blowing the soap bubble is W = surface tension × increase in surface area = T × 2 × 4πr² = 8πr²T

Not only drinking water, many food items like milk, fruits, vegetables etc. are rich in water. They also provide water to our body.

Tissue fluid that reaches the lymph capillaries is called Lymph

Besides blood capillaries, small vessels with their one end closed are seen’ in intercellular spaces. These are the lymph capillaries.

Food habits, lack of exercise

Correct Option is (B) directly to the surface tension and inversely to the bubble size

We know that,

\(\Delta P = \frac{4T}{R} \)

Where, T = surface tension

R = Radius

then,

\(\Delta P \propto T \)

\(\Delta P \propto \frac{1}{R} \)

(B) directly to the surface tension and inversely to the bubble size

Fatty acid and glycerol → Lacteals (Lymphs) 

→ Small lymph ducts → Large lymph ducts 

→ Venacava (Blood) → Heart

(a) Lymph vessels

Complete the following sentence : A generator with commutator produces direct current.

The answer is (a) split-ring type commutator must be used

Split-ring type commutator reverse the direction of current after each half turn of armature. This maintains a DC current

Correct option : (2)

Explanation:

With the increase of intensity of incident light, the number of photons striking the emitter surface per unit area per unit time increases. As each photon colliding and emitting one electron, the number of emitted electrons increases with increase in the increase of intensity of light. The graph in option (2) is representing this fact and therefore is the correct answer.

(c) AC generator will generate a higher voltage.

(a) generator.

1. Permanent magnet

2. Electromagnet.

When there is relative motion between a magnet and a closed loop there is formation of induced emf due to change in magnetic flux linked with the coil. More the speed more the induced emf.

True.

By right hand thumb rule, we can determine the direction of current with respect to magnetic field and vice versa, and we have found that direction of current becomes opposite along with the direction of magnetic field.

Anticlockwise from the side of a magnet.

Perpendicular to the plane of paper in the outward direction by using Fleming’s left hand rule.

The difference between 2Cl and Cl₂ : 

i. 2Cl indicates the two chloride ions. 

ii. Cl₂ indicates one chlorine molecule which is formed by combining of two atoms of chlorine. 

iii. Cl₂ is also known as chlorine gas. 

iv. Cl₂ form exists in nature. The atomic mass of this element is 

(Atomic mass of chlorines × 2) = 35.5 × 2 = 71u

When white phosphorus is left out open in the room temperature for sometime, it burns all by itself.

B. they contain a lot of water. 

The green leaves contain a lot of water. This water does not allow the green leaves to get heated to their ignition temperature and makes burning of green leaves difficult.

The unburnt wax vapours of a burning candle constitutes the innermost zone
of the flame which is least hot.

 Compass needle.

In given situation, according to Fleming’s Left-Hand Rule Force is along y-axis. Current is along x-axis. Then magnetic field is along z-axis.

For the loop, using Lenz’s Law, the force on the part which is nearer, due to the current in the long wire is attraction and force on the part which is farther is repulsion. 

F (attraction) > F (repulsion) 

Hence loop moves towards the wire.

B. coke 

Coke does not vapourise during burning and hence do not produce flame.