Physics P3 And P4 Flashcards
What is the formula for calculating force?
Force equals mass times acceleration (F = ma).
True or False: Energy can be created and destroyed.
False: Energy cannot be created or destroyed, only transformed.
Fill in the blank: The unit of power is ______.
Watt.
What is the principle of conservation of energy?
Energy cannot be created or destroyed, only converted from one form to another.
What is the SI unit of charge?
Coulomb.
Multiple choice: Which of the following is a vector quantity? A) Speed B) Mass C) Velocity D) Temperature
C) Velocity.
Define kinetic energy.
Kinetic energy is the energy of an object due to its motion.
What is the formula for gravitational potential energy?
Potential energy equals mass times gravitational acceleration times height (PE = mgh).
True or False: A higher frequency wave has a longer wavelength.
False: A higher frequency wave has a shorter wavelength.
Fill in the blank: The speed of light in a vacuum is approximately ______ meters per second.
299,792,458.
What is Ohm’s Law?
Voltage equals current times resistance (V = IR).
Multiple choice: What does the term ‘refraction’ refer to? A) Bending of light B) Reflection of sound C) Absorption of heat D) None of the above
A) Bending of light.
What is the definition of acceleration?
Acceleration is the rate of change of velocity over time.
True or False: A static charge can be transferred by contact.
True.
Fill in the blank: The law of universal gravitation states that every point mass attracts every other point mass with a force ______ to the product of their masses and ______ to the square of the distance between their centers.
proportional; inversely.
What is the formula for calculating work done?
Work done equals force times distance (W = Fd).
Multiple choice: Which of the following is a non-renewable energy source? A) Solar B) Wind C) Coal D) Hydro
C) Coal.
Define wavelength.
Wavelength is the distance between successive crests of a wave.
True or False: Sound travels faster in air than in water.
False: Sound travels faster in water than in air.
Fill in the blank: The principle of superposition applies to ______.
Waves.
What is the formula for density?
Density equals mass divided by volume (ρ = m/V).
Multiple choice: Which type of circuit has only one path for current flow? A) Series B) Parallel C) Composite D) Open
A) Series.
What is thermal energy?
Thermal energy is the total kinetic energy of particles in a substance.
True or False: In a vacuum, all objects fall at the same rate regardless of mass.
True.
Fill in the blank: The formula for pressure is ______ divided by area.
Force.
What is the unit of frequency?
Hertz (Hz).
Multiple choice: Which of the following describes a conductor? A) Allows current to flow easily B) Resists current flow C) Has high resistance D) None of the above
A) Allows current to flow easily.
Define displacement.
Displacement is the shortest distance from the initial to the final position of an object.
True or False: The higher the temperature of a substance, the higher its kinetic energy.
True.
Fill in the blank: The law of reflection states that the angle of incidence is equal to the angle of ______.
Reflection.
What is the term for the change of state from liquid to gas?
Evaporation.
Multiple choice: What is the main source of energy for the Earth? A) The Moon B) The Sun C) The Earth’s core D) Wind
B) The Sun.
