Study the given figure showing how water is made pure before it reaches our home and identify P, Q, R and S.
|A||Mixing tank||Pump||Settling tank||Filter|
|B||Pump||Mixing tank||Settling tank||Filter|
|C||Pump||Settling tank||Mixing tank||Filter|
|D||Filter||Mixing tank||Settling tank||Pump|
Which of the following statements are true?
(i) An object will continue moving uniformly until the resultant force on it is zero.
(ii) The bodies do not change their state of rest or motion unless acted upon by an unbalanced external force.
(iii) If a body is at rest on the surface of the Earth then the net downward force exerted by the Earth and net upward force exerted on the body are not equal to each other.
A Only (i) and (ii)
B Only (ii) and (iii)
C Only (i) and (iii)
D All (i), (ii) and (iii)
Match the columns and select the correct option.
|Column I||Column II|
|(A) Body feathers||1. Used in flapping|
|(B) Down feathers||2. Give the bird its shape|
|(C) Flight feathers||3. Keep the bird warm|
A (A)-3, (B)-2, (C)-1
B (A)-2, (B)-3, (C)-1
C (A)-1, (B)-2, (C)-3
D (A)-3, (B)-1, (C)-2
A bus driver is reversing his bus at a speed 8 m s–1. The rear view mirror of a bus is a plane mirror. The driver sees in his rear view mirror the image of a car parked behind his bus. The speed at which the image of the car appears to approach the driver will be
A 2 m s–1
B 4 m s–1
C 8 m s–1
D 16 m s–1
In an experiment shown in figure, the water near the top of the tube starts boiling but the wax in the test tube does not melt completely. What do you conclude?
A Convection cannot occur in water.
B Water is a poor conductor of heat.
C Wax is a bad radiator of heat.
D Heat is not reaching at the bottom of the test tube as tube is made of insulator.
The bimetallic strip made up of aluminium and copper, when heated bends in the direction shown below. Which metal expands more when the two are heated at the same temperature?
A Aluminium expands more than copper.
B Copper expands more than aluminium.
C Both aluminium and copper expand by the same amount.
D Neither aluminium nor copper expands.