E&M
What is the SI unit of electric resistance?
What is a Ohm?
An object starts from rest and accelerates uniformly at 3 m/s². What is its speed after 4 seconds?
What is 12 m/s? (v = at = 3 × 4)
What temperature in Celsius corresponds to 373 K?
What is 100°C? (T°C = T_K − 273)
What is the speed of light in a vacuum?
What is 3×10⁸ m/s? (approximately 300,000 km/s)
Newton's First Law says an object at rest stays at rest unless acted on by what?
What is an external force?
A 9V battery is connected across a 3Ω resistor. What current flows through the circuit?
What is 3A?
A car travels 150 m in 10 seconds at constant velocity. What is its speed?
What is 15 m/s? (v = d/t = 150/10)
This law of thermodynamics essentially states that energy cannot be created or destroyed — only converted from one form to another.
What is The First Law of Thermodynamics? (conservation of energy)
Does light travel faster in water or in a vacuum?
What is a vacuum? (Light slows down when passing through any medium.)
If you double the mass of an object while keeping the net force the same, what happens to its acceleration?
Three resistors of 2 Ω, 4 Ω, and 6 Ω are connected in series. What is the total resistance?
What is 12 Ω? (R_total = 2 + 4 + 6)
At what angle should a projectile be launched to achieve the maximum horizontal range (ignoring air resistance)?
What is 45°?
True or False: Heat naturally flows from a cold object to a hot object on its own.
What is false? (Heat flows spontaneously from hot to cold.)
This phenomenon explains why a straw appears bent when sitting in a glass of water.
What is Refraction?
Newtons Third Law is....
What is, every action there is an equal and opposite reaction?
In a circuit, resistors in this configuration all share the same voltage across them.
What is Parallel?
A projectile is launched at 45° with an initial speed of 20 m/s (g = 10 m/s²). What is the maximum height reached?
What is 10m? (h = v₀²sin²θ / 2g = 400 × 0.5 / 20)
This temperature scale starts at absolute zero, meaning it has no negative values.
What is the Kelvin scale?
Which travels faster: visible light or sound through air?
Sound obviously
jk What is Light?
True or False: In the absence of air resistance, a heavier object falls faster than a lighter one.
Two point charges of +3 μC and +3 μC are 0.3 m apart. Using Coulomb's constant k = 9×10⁹ N·m²/C², what is the electrostatic force between them?
What is 0.9 N? (F = kq²/r² = 9×10⁹ × 9×10⁻¹² / 0.09)
Two cars start from the same point. Car A moves at 60 km/h and Car B moves in the same direction at 40 km/h. After 3 hours, how far apart are they?
What is 60 km? (Δv = 20 km/h × 3 h)
What is absolute zero in Celsius — the theoretical temperature at which all molecular motion stops?
What is −273.15°C? (0 K)
In the visible spectrum, which color of light has the longest wavelength?
What is Red?
What force keeps the Moon in orbit around the Earth?
What is gravity?