A.\(1200J;60m\)
B.\(1200J;40m\)
C.\(1000J;40m\)
D.\(1000J;60m\)

A.\(a)\,400K;\,\,\,b)\,130,75K\)
B.\(a)\,673K;\,\,\,b)\,130,75K\)
C.\(a)\,400K;\,\,\,b)\,403,75K\)
D.\(a)\,673K;\,\,\,b)\,403,75K\)

A.\(a < c < b\)
B.\(a < b < c\)
C.\(b < a < c\)
D.\(b > a > c\)

A.\(a < 0,\,\,b > 0\)  
B.\(a > 0,\,\,b < 0\)  
C.\(a > 0,\,\,b > 0\)  
D.\(a < 0,\,\,b < 0\)

A.\(4\pi {a^2}\)  
B.\(3\pi {a^2}\)  
C.\(2\pi {a^2}\)  
D.\(\pi {a^2}\)

A.\(x + y + 2z - 15 = 0\)  
B.\(x + y + 2z - 9 = 0\)  
C.\(x + y + 2z = 0\)  
D.\(x + y + 2z + 10 = 0\)

A.\(\dfrac{{\pi {a^3}}}{4}\)  
B.\(\dfrac{{\pi {a^3}}}{3}\)   
C.\(\dfrac{{\pi {a^3}}}{{12}}\)  
D.\(\pi {a^3}\)

A.\(7\)
B.\(6\)
C.\(5\)
D.\(8\)

A.\(m < 0\)  
B.\(0 < m < 1\)   
C.\(\left[ \begin{array}{l}m < 0\\m > 1\end{array} \right.\)  
D.\(m > 1\)

A.\(\dfrac{{2a}}{3}\)  
B.\(a\sqrt 3 \)   
C.\(\dfrac{{3a}}{4}\)  
D.\(\dfrac{{a\sqrt 3 }}{2}\)