Exploring Engineering Physics Concepts

What is the principle of conservation of energy?

• Energy can be created and destroyed.

• Energy can only be created from matter.

• Energy cannot be created or destroyed, only transformed.

• Energy is always lost in transformations.

Define Newton's first law of motion.

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• An object will accelerate if no forces are acting on it.

• An object will change direction only if a force is applied.

• An object in motion will eventually stop without any force.

Explain the concept of torque and its formula.

• Torque (τ) = r × F × sin(θ)

• Torque (τ) = m × a

• Torque (τ) = p × v

• Torque (τ) = F × d

What is the difference between scalar and vector quantities?

• Scalar quantities can be negative; vector quantities cannot.

• Scalar quantities are always larger than vector quantities.

• Scalar quantities have only magnitude; vector quantities have both magnitude and direction.

• Scalar quantities have direction; vector quantities have only magnitude.

Describe the phenomenon of resonance in physics.

• Resonance happens when a system is forced to vibrate at a frequency far from its natural frequency.

• Resonance is the phenomenon where sound waves are completely absorbed by a medium.

• Resonance is the phenomenon where a system experiences increased amplitude when driven at its natural frequency.

• Resonance occurs when a system is at rest and experiences no movement.

What is the significance of the speed of light in physics?

• The speed of light can be exceeded by sound waves.

• The speed of light is only important in astronomy.

• The speed of light is irrelevant to quantum mechanics.

• The speed of light is significant as it is the maximum speed for information and matter, fundamental to the theory of relativity and electromagnetic theory.

Explain the concept of electric field and its unit.

• Electric field is a force that only acts on neutral objects, measured in newtons (N).

• Electric field is a region around a charged particle where a force is exerted on other charges, measured in volts per meter (V/m).

• Electric field is the distance between two charged particles measured in meters (m).

• Electric field is a type of energy measured in joules (J).

What is the relationship between frequency and wavelength?

• Frequency and wavelength are directly related.

• Frequency and wavelength are inversely related.

• Frequency has no effect on wavelength.

• Wavelength increases with increasing frequency.

Define the term 'moment of inertia'.

• The speed at which an object rotates around a fixed point.

• A measure of an object's mass in linear motion.

• The moment of inertia is a measure of an object's resistance to changes in its rotational motion.

• A calculation of an object's weight in a gravitational field.

What are the laws of thermodynamics?

• The Zeroth, First, Second, and Third Laws of Thermodynamics.

• The Laws of Kinetics and Dynamics.

• The First and Second Laws of Energy Conservation.

• The First, Second, and Fourth Laws of Thermodynamics.