Which of the following symptoms is likely not to afflict an astronaut in space (a) swollen feet, (b) swollen face, (c) headache, (d) orientational problem?

Which of the followings are relations from {x, y, z} to {a, b, c, d} {(x, c), (y, y)}

Which of the followings are relations from {x, y, z} to {a, b, c, d} {a, b, c, d, x, y, z}

A monkey of mass 40 kg climbs on a rope (Fig. 5.20) which can stand a maximum tension of 600 N. In which of the following cases will the rope break: the monkey (a) climbs up with an acceleration of 6 m s^2 (b) climbs down with an acceleration of 4 m s^2 (c) climbs up with a uniform speed of 5 m s^1 (d) falls down the rope nearly freely under gravity? (Ignore the mass of the rope).

Given a + b + c + d = 0, which of the following statements are correct: 'a, b, c, and d must each be a null vector,

Which of the followings are relations from {x, y, z} to {a, b, c, d} ,{(x, d),(y, b),(z, c)}

Which of the followings are relations from {x, y, z} to {a, b, c, d} {(a, x),(b,y), (c, z)}

Which of the following is true ? (a) A determinant is a square matrix. (b) A determinant is a number associated to a matrix. (c ) A deteminant is a number associated to a square matrix. (d) None of the above

Samples of four metals A,B,C and D were taken and added to the following solutions one by one.The results obtained have been tabulated as follows. Use the table above to answer the following questions about metals A,B,C and D. (i)Which is the most reactive metal? (ii)What would you observe if B is added to a solution of copper (II) sulpahate? (iii)Arrange the metals A,B,C and D in the order of decreasing reactivity.