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The top of a lake gets frozen at a place where the surrounding air is at a temperature of -20^(@)C . Then :

State True or False The place value of a digit at the hundredths place is 1/10 times the same digit at the tenths place.

Same number of books are placed in four books cases as shown. Which look case is most likely to topple forward if pulled a little at the top towards right -

A 10 cm cube of meatl is fastened rigidly in place. A second, identical cube of metal is pulled across the top of the first cube at a constant speed by a constant 10 N force, as shown. The frictional force between the cubes.

A 10 kg block is placed on top of a 40 kg block as shown in figure .A horizontal force F acting on B cause an acceleration of 2 ms^(-2) to B .For this situation marks our the correct statement(s)

A copper metal cube has each side of length 1 m. The bottom edge of the cube is fixed and tangential force 4.2xx10^(8) N is applied to a top surface. Calculate the lateral displacemet of the top surface if modulus of rigidity of copper is 14xx10^(10)" N"//"m"^(2) .