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Subject: Science, asked on 16/10/17

q no 66
Q.66. Two equal masses of 3 kg each are suspended from a spring balance as shown in figure. The reading of the spring balance (in kilogram force) will be

Subject: Science, asked on 15/10/17

Q no 9

Subject: Science, asked on 15/10/17

Q no 7 and 8:


7. A metal block of volume 500 cm3 and density 2 gcm​-3 suspended from a spring balance and one fourth of its volume is immersed in water. The reading on the spring balance is ____________ N (take g= 10 ms-2)
(A) 8.575          (B) 10.175
(C) 500             (D) 8.750

8. A person has a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding of these two frequencies? Take the speed of sound in air as 344 ms-1
(A) 172 m, 172 m              (B) 17.2 m, 17.2 m
(C) 17.2 m, 1.72 cm 
 

Subject: Science, asked on 15/10/17

Q no 5 and 6 :

5. A body A of mass m1 on collision exerts a force on another body B or mass m2. If the acceleration produced in B is a2, then the acceleration (in magnitude) of A is ___________

A m2m1a2              B m1m2a2C m1m2a2             D m1+m2a2

6. When a object of weight W is immersed in a liquid , its weight in the liquid is found to be W1- when it is immersed in water, the weight of the water displaced is found to be W2 The relative density of the liquid is. 

A  W2W1                  B  W-W1W2C  W2W-W1         C  W-W2W1
 

Subject: Science, asked on 15/10/17

What is inertia??

Subject: Science, asked on 14/10/17

A cubical box of mass 2.5 kg is kept on a labelled horizontal surface if it exists a pressure of 100 Pascal on the surface then find the volume of the block. Take g as 10m/s^2. Plzz solve fast with process

Subject: Science, asked on 9/10/17

Question number 1 two and 3

Q1. A force of 20 N is applied to an object of area 50 m2, then the pressure will be 

         (1) 0.10 Pa                   (2) 0.20 Pa                     (3) 0.30 Pa                 (4) 0.40 Pa


Q2. The necessary requirement for a fuse wire is 

         (1) conductor with low melting point                       (2) conductor with high melting point

         (3) insulator with low melting point                         (4) insulator with high melting point


Q3. The size of pupil is controlled by–

          (1) Cornea                       (2) Retina                 (3) Lens                      (4) Iris
 

Subject: Science, asked on 3/10/17

give 10 examples of electrostatic force. And also name the charges of the object .Plz answer fast its urgent.....

Subject: Science, asked on 2/10/17

what are the two parameters that define pressure?

Subject: Science, asked on 26/9/17

What type of forces are applied on a rocket when it goes up in the space ?

Subject: Science, asked on 15/9/17

Define:
a) centrifugal force
b)centripetal fore
Pls tell this quick and use everyday language(not scientific terms) and explain with examples or pictures.
Pls? Experts to do.

Subject: Science, asked on 11/9/17

write an essay on the force is a nessessary evil

Subject: Science, asked on 10/9/17

Question
a) Why does our nose bleed when we move up the mountains?
b) Gravitational force exists between you and building. Why are you not pulled towards the building?

Subject: Science, asked on 9/9/17

Answer question no.26) both a and b in detail.(5 marks*)
Q.26. a) Why does our nose bleed when we move up the mountains?
b) Gravitational force exists between you and building. Why are you not pulled towards the building?

Subject: Science, asked on 9/9/17

Question no. 15 plz answer in detail 5 marks
Q.15. Suppose you are going in a jet plane and one of the windows break due to an accident. What problems do you think you will face?

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