Physics
Stars are held together by

Gravitational forces
Electrical forces
Magnetic forces
Ionic forces

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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?

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

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