1. What is the formula for density?
Answer: The formula for density (ρ) is ρ = m/V, where m is the mass of the object and V is its volume.
2. What is the difference between kinetic and potential energy?
Answer: Kinetic energy is the energy an object possesses due to its motion, while potential energy is the energy an object possesses due to its position or state.
3. What is the formula for the work done on an object?
Answer: The formula for the work done (W) on an object is W = Fd, where F is the force applied and d is the distance moved in the direction of the force.
4. What is the difference between sound and light waves?
Answer: Sound waves are mechanical waves that require a medium to propagate, while light waves are electromagnetic waves that can travel through a vacuum.
5. What is the formula for the moment of inertia?
Answer: The formula for the moment of inertia (I) is I = mr^2, where m is the mass of the object and r is its distance from the axis of rotation.
6. What is the difference between a scalar and a vector quantity?
Answer: Scalar quantities have only magnitude, while vector quantities have both magnitude and direction.
7. What is the formula for the frequency of a wave?
Answer: The formula for the frequency (f) of a wave is f = 1/T, where T is the period of the wave.
8. What is the difference between a conservative and non-conservative force?
Answer: A conservative force conserves mechanical energy, while a non-conservative force does not conserve mechanical energy.
9. What is the formula for the pressure of a fluid?
Answer: The formula for the pressure (P) of a fluid is P = F/A, where F is the force applied and A is the area over which the force is applied.
10. What is the difference between an ideal and a non-ideal gas?
Answer: An ideal gas follows the gas laws exactly, while a non-ideal gas deviates from the gas laws at high pressures or low temperatures.
11. What is the difference between elastic and inelastic collisions?
Answer: In an elastic collision, kinetic energy is conserved, while in an inelastic collision, kinetic energy is not conserved.
12. What is the formula for electric potential energy?
Answer: The formula for electric potential energy (PE) is PE = qV, where q is the charge and V is the electric potential.
13. What is the difference between a concave and convex lens?
Answer: A concave lens is thinner at the center than at the edges and diverges light, while a convex lens is thicker at the center than at the edges and converges light.
14. What is the formula for power?
Answer: The formula for power (P) is P = W/t, where W is the work done and t is the time taken.
15. What is the difference between a period and frequency?
Answer: Period is the time taken for one complete cycle of a wave, while frequency is the number of cycles per second.
16. What is the formula for the magnetic field around a wire?
Answer: The formula for the magnetic field (B) around a wire is B = μI/2πr, where μ is the magnetic constant, I is the current, and r is the distance from the wire.
17. What is the difference between a transistor and a diode?
Answer: A transistor can amplify and switch electronic signals, while a diode only allows current to flow in one direction.
18. What is the formula for Ohm's law?
Answer: The formula for Ohm's law is V = IR, where V is the voltage, I is the current, and R is the resistance.
19. What is the difference between an alpha and beta particle?
Answer: An alpha particle consists of two protons and two neutrons and has a positive charge, while a beta particle is an electron or positron and has a negative or positive charge.
20. What is the formula for the frequency of a simple pendulum?
Answer: The formula for the frequency (f) of a simple pendulum is f = 1/(2π) * √(g/L), where g is the acceleration due to gravity and L is the length of the pendulum.
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