What are the answers to these physics multiple-choice questions on mechanics?

Here are the solutions to the multiple-choice questions: 1. According to the Newton's Law of universal gravitation force : Newton's Law of Universal Gravitation states that the gravitational force F is directly proportional to the product of the masses (m_1 m_2) and inversely proportional to the square of the distance (1/r^2) between their centers. D)* Both (A) and (B) 2. The spring in brakes and clutches are used: Springs in mechanical systems like brakes and clutches are commonly used to return components to their initial position after they have been actuated or released. A)* To restore original position 3. Newton's first law of motion is also known as law of: Newton's first law describes the tendency of an object to resist changes in its state of motion, a property known as inertia. C)* Inertia 4. Stability of a racing car is increased by: Lowering the center of gravity makes a vehicle more stable, reducing its tendency to tip over, especially during turns. D)* Lowering its centre of gravity 5. A body is in unstable equilibrium after slight till if its center of gravity: In unstable equilibrium, a slight displacement causes the center of gravity to be lowered, and the body continues to move away from its original position, often toppling. This occurs when the center of gravity passes over the point of contact. C)* Passes over the point contact 6. Quantity of matter contained in body is called: Mass is the fundamental measure of the amount of matter in an object. A)* Mass 7. Length, mass, electric current, time intensity of light and amount of substance are examples of: These are the seven fundamental quantities from which all other physical quantities can be derived in the International System of Units (SI). A)* Base quantities 8. Linear thermal expansion of a solid depends upon: The change in length due to thermal expansion ( L) is given by L = L_0 T, where L_0 is the original length, is the coefficient of linear expansion (a property of the material), and T is the increase in temperature. D)* All of these 9. Heat is the form of: Heat is a form of energy that is transferred between systems or objects with different temperatures. C)* Energy 10. Coal is not a renewable source of energy. Coal is a fossil fuel, which is a finite resource formed over millions of years, making it a non-renewable energy source. Solar, wind, and geothermal energy are renewable. B)* Coal 11. Evaporation can occur at: Evaporation is a surface phenomenon where liquid molecules gain enough energy to escape into the gas phase, and it can occur at any temperature below the boiling point. D)* All temperatures 12. If a gas is heated in a sealed cylinder, then: In a sealed cylinder, the volume is constant. Heating the gas increases the kinetic energy of its particles, leading to an increase in the gas's temperature and, consequently, an increase in the pressure inside the container. D)* All of these