Physics
A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

The liquid surface falls down only at the center of the tank
None
The surface of the liquid remains horizontal
The liquid surface falls down on the direction of motion and rises up on the back side of the tank

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Physics
What is the direction of torque?

Parallel to the radius
Perpendicular to the direction of applied force
Opposite to the direction of applied force
Same as the direction of applied force

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