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The valve between the left ventricle and the aorta is the aortic valve. The aortic valve prevents the retrograde flux of blood to the left ventricle during diastole. Besides, as the aortic valve closes during diastole, part of the retrograde blood flux is impelled through the coronary ostia (openings), orifices located in the aorta wall just after the valvular insertion and contiguous to the coronary circulation responsible for the blood supply of the cardiac tissues.

The function of the left ventricle is to get blood from the left atrium and to pump the blood under high pressure to the systemic circulation. After leaving the left ventricle the blood enters the aorta, the largest artery of the body. 

The pulmonary veins are part of the pulmonary circulation. They are vessels that carry oxygen-rich (arterial) blood from the lungs to the heart. There are four pulmonary veins, two that drain blood from the right lung and other two that drain the left lung. The pulmonary veins debouch into the left atrium bringing arterial blood to the heart. Although they are veins they carry arterial blood and not venous blood.

The heart is made of striated cardiac muscle tissue. The heart muscle is called the myocardium and it is oxygenated and nutrified by the coronary arteries. The coronary arteries come from the base of the aorta and ramify around the heart penetrating the myocardium.

Diseases of the coronary arteries are severe conditions.

DOWN BY CONTRACTION

The vestibular apparatus is constituted of structure namely utricle, saccule and three semicircular canals.

a. Ommatidia 

b. Body balancing 

c. Retina

a) False conjunctiva is the layer which protects the sclera except the cornea. 

b) Hair cells in the cochlea are help in hearing.

(a) Satellite DNA or repetitive DNA These sequences normally do not code for any proteins. These sequence show high degree of polymorphism. 

(b) (i) isolation of DNA, 

(ii) digestion of DNA by restriction endonucleases, 

(iii) separation of DNA fragments by electrophoresis, 

(iv) transferring (blotting) of separated DNA fragments to synthetic membranes such as nitrocellulose or nylon, (v) hybridization on using labelled VNTR probe, (vi) detection of hybridized DNA fragments by autoradiography The applications of DNA fingerprinting technique are in Forensic science / determining population and genetic diversities / paternity test.

a) 1. Taste. 

2. Others senses through skin.

b) 1. Papilla. 

2. Others are parts of the ear.

c) 1. Ommatidia. 

2. Others are parts of eye.

Food particles dissolve in the saliva → Taste receptors (taste buds) are stimulated → Impulses form and transmit through nerves → Brain → Experience of taste.

Shark has highly sensitive olfactory receptors.

a) Aromatic particles dissolve in the mucus and stimulate olfactory receptors. 

b) Reduction/damage of cone cells that help to distinguish red and green colors.

Smell influences tasting. During cold, excess mucus will be produced in the nasal cavity. 

This will obstruct the normal stimulation of olfactory receptors and hence, we are unable to recognize smell and feel the food tasteless.

Analysis are given below in their correct order

c) Food particles dissolve in saliva.

d) Reaches taste buds.

f) Chemoreceptors get stimulated.

b) Causes impulses.

e) Impulses reach the brain.

a) Experience of taste.

em = MdI1/dt

M = em/dI1/dt = 11.25/1500 = 7.5 * 10^-3 H = 7.5mH

Now,  L1 = (N1Φ1)/I1

So,  Φ1/I1 = L1/N1 = 15*10^-3/ 750 = 2* 10^-5Wb/A

Now, k= M/√L1L2 = (7.5 * 10^3)/√L2 = (7.5*10^3)/15*10^3

  = 0.5 Φ

= 50%

( since,  L1=L2=L)









 

Correct option (3) inversely proportional to carrier frequency 

Explanation:

By theory size of atenna of reciever and transmitter both inverse to carrier frequency

The correct option

(2) 1/modulation frequency

Correct option (4)  0.020

Explanation:

No current flows through diode D₂ as it is reverse biased. So, total resistance = 50 + 150 + 100 = 300Ω.

Current through 100 Ω resistance I = V/R = 6/300 = 0.02 amp

The correct option (2) 0.2Ω  

Explanation:

R_s = I_gR_g/(I - I_g) 

= (2 x 10^-3 x 50)/(0.5 - 2 x 10^-3) 

= 0.31/0.498 = 0.2Ω

Andreas Vesalius was the founder of modern anatomy This 16^th century physician and surgeon completely revolutionized the science of biology and medicine. By careful and painstaking dissection of cadavers, he learned a great deal about the structure of the human body and led the foundation for modern physiology. In 1543, he published remarkable book ‘De humani corporis fabrica’. It was afully illustrated anatomy of the human body, based on tions in anatomy that had persisted for over a thousand years. Veasalius’ anatomical studies corrected many religious beliefs and the finding of a previous physician Galen , who had dissected apes because religion forbade him to dissect real human cadavers. Vesalius was the first surgeon to actually cut open a cadaver or dead body of a human being, and his exceptionally detailed muscle drawings changed medical history for all time.

Galileo Galilei was a groundbreaking Italian astronomer, physicist, mathematician, philosopher and inventor. He opened the eyes of the world to a new way of thinking about how the solar system works. For many years, scientists had believed that the solar system revolved around the Earth and that the Earth was the centre of the Universe. Galileo was the first scientist to prove that this wasn’t correct. He stated that in fact, the solar system revolved around the Sun. he also invented an improved telescope so that he could gaze far into space. He was the first to see Jupiter's moons and the first to realize that our Moon was covered with craters. Besides inventing the improved telescopes, he also invented the compass and a thermometer. Galileo has played a major role in the scientific revolution of the 17^th century.

Tycho Brahe was a famous Danish astronomer who played a vital role in the development of various astronomical instruments. He devised his own instrument. He devised his own instrument, even before the invention of the telescope, to observe the heavens. These instruments allowed Brahe to determine the movements of heavenly objects more precisely . Brahe made significant contributions in the study of the Moon and the planet Mars, which would later prove extremely useful to other astronomers. Instruments built by Brahe proved to be very helpful in accurate determinations of her latitude and longitude. Brahe built his first observatory at Herrevad Abbey in 1572, and another one named ‘uraniborg’ in 1576. He also built a third one called ‘Stjerneborg’ in 1581.

(i) J Text Field 

(ii) J Text Area 

(iii) J Label

(iv) J Panel 

(v) J Button

ABCD = 0001= A’B’C’D 

ABCD = 0110 = A’BCD’ 

ABCD = 1110 = ABCD’ 

The sum-of-products equation is as following :

F = A’B’C’D + A’BCD’ + ABCD’

get Password() method returns the password entered in a password field.

• A text field’s text property can hold single line of text unless it is an HTML text.
• A text area’s text can hold any number of lines of text depending upon its rows property.

We would set echo Char property for setting the password character as ‘$’..

Text Field and Text Area controls are allow text entry in them.

The half-life of ¹⁴₆C is 5700 years. It means that one half of the present number of radioactive nuclei of ¹⁴₆C will remain undecayed after 5700 years.

Number of nuclei X after 2 hours, N_X = N₀(1/2) = N₀/4

Number of nuclei Y after 2 hours, N_Y = N₀(1/2)^2/2 =N₀/2

∴ Ratio of rates of disintegration R_x/R_y = (N₀/4)/N₀/2 = 1/2.

1. Events 

•  Item event 
•  Action Event

2. Event listeners

•  Item Listener 
•  Action Listener

3. Event Handler Method 

•  item State Changed() 
•  action Performed()

No, by default combo box is a un editable. You can change it to be editable by setting its editable property to true i.e., checked.

Get Selected Item() is used to obtain selected item from a combo box..

We would use get Selected Indices() method to determine which index has been selected in a list.

(e)  none of these

The basic principle of machanics is that momentum transfer is maximum when the mass of colliding particle and target particle are equal. Heavy water has negligible absorption cross-section for neutrons and its mass is small; so heavy water molecules do not absorb fast neutrons ; but simply slow them.

Logical product having all the variables of a function is called Minterm.

The Boolean expression, containing only the product of Maxterms, is called Canonical Product- of –Sum Form of an expression.

Three phase induction motors can be started:

1. Direct Online- direct-on-line: which means that the rated supply is directly applied to the motor.

2. Starting Of Squirrel Cage Motors: Starting in-rush current in squirrel cage motors is controlled by applying reduced voltage to the stator.

3. Auto- Transformers: It is basically a three phase step down transformer with different taps provided that permit the user to start the motor at, say, 50%, 65% or 80% of line voltage.

4. Star-Delta Starter: This method is used in the motors, which are designed to run on delta connected stator.

5. Starting Of Slip-Ring Motors: Slip-ring motors are started with full line voltage, as external resistance can be easily added in the rotor circuit with the help of slip-rings.

• Remove the springs and brushes by removing the cover typically with a slotted dcrew driver 
• Check the motor brushes are moving freely when disassembling 
• Check that the spring tension on all the brushes are about equal 
• Check the face of the brushes- it should be shiny or polished which will indicate good contact. If not replace 
• Check the brush length. Typical fanuc DC motor brushes when new are about .75" long. The less length the less spring tension on the brush. 
• Ounce brushes are removed shine a flashlight inside and look to see if there is build up on the commutator or in the housing. Use an air line/clean air supply to blow this out. Clean between all the commutator grooves and area for brushes. If the is black residue on the commutator polish with fine sandpaper. 
• Check for wear grooves on the commutator from the brushes rubbing. Consider replacement if extremely worn or pitted.

[(x + y)’ + (x + y)’]’ = ((x + y)’)’.((x + y)’)’ (Using De Morgan’s first theorem i.e., (A + B)’ = A’.B’) 

= (x + y).(x + y) (∵X’ = X)

= x + y

For electron, mass m = 9.1 × 10^–31 kg

(a) Momentum p = √2mE_k = √2meV

= √(2x 9.1 x 10^-31 x 1.6 x 10^-19 x 56) = 4.04 x 10^-24 kg ms^-1

(b) de Broglie wavelength λ = h/p = (6.63 x 10^-34/4.14 x 10^-24)

= 1.64 × 10^–10 m = 0.164 nm

(AB’ + C’D’)’ = (AB’)’.(C’D’)’ (De Morgan’s first theorem)

= (A’ + B’’).(C’’ + D’’) (DeMorgan’s second theorem i.e., (A.B)’= A’+ B’)

= (A’ + B’).(C + D) ((X’)’= X)