When a bus is climbing on hilly road, a standing passenger, balances himself by keeping legs apart to achieve balance by keeping C.G.____________.
When a bus is climbing on hilly road, a standing passenger, balances himself by keeping legs apart to achieve balance by keeping C.G.____________.
A
left side of him
B
right side of him
C
back side of him
D
within the legs
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D
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Below in the question are Given two statements (A) and (B).These statements may be either independent causes or may be effects of independent causes. One of these statements may be the effect of the other statement. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Mark answer 1) if statement (A) is the cause and statement (B) is its effect. 2) it statement (B) is the cause and statement (A) is the effect. 3) if both the statements (A) and (B) are independent causes. 4) if both the statements (A) and (B) are effects of independent causes. 5) if both the statements (A) and (B) are effects of some common cause. A. The braking system of the tourist bus carrying 40 passengers failed while negotiating a stiff climb on a hilly road. B. The tourist bus fell into the gorge killing at least ten passengers and seriously injuring all the remaining.
Rain is falling vertically. A man running on the road keeps his umbrella tilted but a man standing on the street keeps his umbrella vertical to protect himself from the rain. But both of them keep their umbrella vertical to avoid the vertical sun-rays. Explain.
Knowledge Check
When one of the passengers was traveling on a city bus, his mobile phone slipped from his hands and that fell out of the bus through the window. This was observed by a school boy standing on the road. The path of the mobile phone observed by the school boy is ___________.
When one of the passengers was traveling on a city bus, his mobile phone slipped from his hands and that fell out of the bus through the window. This was observed by a school boy standing on the road. The path of the mobile phone observed by the school boy is ___________.
A
circular
B
parabolic
C
linear
D
elliptical
Statement I: A person is standing near a railway trach. A train is moving on the track. As the train is approaching the person, apparent freqeuncy keeps on increasing and when the train has passed the person, then apparent freqeuncy keeps on decreasing. Statement II: When train is approaching the person then, f=f_0[(c )/(c-u)] and when train is moving away from person f=f_0[(c )/(c+u)] Here, c is velocity of sound u is velocity of train and f_0 is original frequency of whistle.
Statement I: A person is standing near a railway trach. A train is moving on the track. As the train is approaching the person, apparent freqeuncy keeps on increasing and when the train has passed the person, then apparent freqeuncy keeps on decreasing. Statement II: When train is approaching the person then, f=f_0[(c )/(c-u)] and when train is moving away from person f=f_0[(c )/(c+u)] Here, c is velocity of sound u is velocity of train and f_0 is original frequency of whistle.
A
Statement I is true, Statement II is true: Statement II is a correct explanation for statement I.
B
Statement I is true, Statement II is true, Statement II is NOT a correct explanation for Statement I.
C
Statement I is true, Statement II is false
D
Statement I is falce: Statement II is true
Today, obesity is the most serious problem of the people. Obesity is the product of change in lifestyle, food, mobility, health and change in nutrition. Results of obesity are the diseases like blood pressure, diabetes, some type of cancer, heart diseases, low self-respect or weariness. Therefore, we should change our life-style by taking balanced diet, full of proper quantity of carbohydrates, proteins, fats, vitamins and mineral salts and by keeping ourselves physically active. Keeping in mind the life-style, type and load of the work, taste of meal and irregularities, a dietician can also help. The author advises the people to change their life-style upto the necessary level, when people :
Today, obesity is the most serious problem of the people. Obesity is the product of change in lifestyle, food, mobility, health and change in nutrition. Results of obesity are the diseases like blood pressure, diabetes, some type of cancer, heart diseases, low self-respect or weariness. Therefore, we should change our life-style by taking balanced diet, full of proper quantity of carbohydrates, proteins, fats, vitamins and mineral salts and by keeping ourselves physically active. Keeping in mind the life-style, type and load of the work, taste of meal and irregularities, a dietician can also help. The author advises the people to change their life-style upto the necessary level, when people :
A
Migrate from cities towards villages
B
Go on foot to work places and avoid air conditioned cars
C
Save money to pay the doctor, in case of illness
D
Change the food habits and do more exercise
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The circuit shows in Fig . 6.33 shows the use of potentiometer to measure the internal resistance of a cell. (a) When the key is open, how does the balance point change, if the driver cell decreases ? (b) When the key is closed, how does the balance point change, if R is increased, keeping the current from the driver cell constant ?
Read the given passage and answer question number 1 to 5 that follow : Hormones are molecules that act as intercellular messengers . These are produced by endocrine glands in the body and are poured directly in the blood stream which transports them to the site of action . In terms of chemical nature , some of these steriod ,e.g., estrogens and androgens, some other are amino acid derivatives such as epinephrine and norepinephrine. Hormones have several function in the body. The help to maintain theh balance of biological activities in the body . The role of insulin in keeping the blood glucose level within the narrow limits is an example of this function . Insulin is relased in response to the rapid rise in blood glucose level . On the other hand hormore glucagon tends to increase the glucose level in the blood . The two hormones together regulate teh glucose level in the blood. Epinephrine and norepinephrine mediate respones to external stimuli.Growth hormones and sex hormones play role in the grwoth and development. Thyroxine produced in the thyroid gland is an iodinated derivative of amino acid tyrosine. What kind of hormone is insulin ?
Read the given passage and answer question number 1 to 5 that follow : Hormones are molecules that act as intercellular messengers . These are produced by endocrine glands in the body and are poured directly in the blood stream which transports them to the site of action . In terms of chemical nature , some of these steriod ,e.g., estrogens and androgens, some other are amino acid derivatives such as epinephrine and norepinephrine. Hormones have several function in the body. The help to maintain theh balance of biological activities in the body . The role of insulin in keeping the blood glucose level within the narrow limits is an example of this function . Insulin is relased in response to the rapid rise in blood glucose level . On the other hand hormore glucagon tends to increase the glucose level in the blood . The two hormones together regulate teh glucose level in the blood. Epinephrine and norepinephrine mediate respones to external stimuli.Growth hormones and sex hormones play role in the grwoth and development. Thyroxine produced in the thyroid gland is an iodinated derivative of amino acid tyrosine. What are different functions of hormoes ?
Many lyophilic sols and few lyophobic sols when coagulated under some special conditions changes into semi rigid mass, enclosing whole amount of liquid within of liquid within itself, it is called gel and the process is called gelation. Gelatin, agar-agar, gum-Arabic can be converted into gels by cooling them under moderate concentration conditions. Hydrophobic sols like silicic acid. Al(OH)_(3) are prepared by double decomposition and exchanged of solvent method. Types of gel : 1. Syneresis/weeping of gel : The spontaneous liberation of liquid from a gel is called syneresis or weeping of gels. It is reverse of swelling. e.g., geletin, agar-agar show syneresis at low concentration while silicic shows it at high concentration. 2. Imbibition or swelling of gel : When gel is kept in a suitable liquid (water) it absorb large volume of liquid. The phenomenon is called imbibition or sweeling of gel. 3. Thixotropic : Some gels when shaken to form a sol, on keeping changes into gel are termed as thixotropic gel and phenomenon is called thixotropy. e.g., gelatin and silica liquify on shaking changing into corresponding sol and the sol on keeping changes back into gel. Some types of gels like gelatin and silica liquify on shaking thereby changing into sols. The sols on standing change back into gels. This process is know as :
A simple pendulum is suspended from the ceiling of a car and its period of oscillation is T when the car is at rest. The car starts moving on a horizontal road with a constant acceleration g (equal to the acceleration due to gravity, in magnitude) in the forward direction. To keep the time period same, the length of th pendulum