General Science Flashcards
7 cards from real Picat practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General Science flashcards as text
What is the SI unit of electrical resistance?
Answer: Ohm
The ohm (Ω) measures electrical resistance and is named after physicist Georg Simon Ohm.
Which type of energy is stored in a compressed spring?
Answer: Elastic potential energy
A compressed or stretched spring stores elastic potential energy, which is released when the spring returns to its natural length.
Newton's Third Law of Motion states that for every action there is:
Answer: An equal and opposite reaction
Newton's Third Law states that forces always come in equal and opposite pairs — if A pushes B, B pushes back on A with the same magnitude.
What is the correct formula for calculating speed?
Answer: Speed = Distance ÷ Time
Speed is defined as the distance traveled divided by the time taken to travel that distance.
Which type of wave does sound travel as through air?
Answer: Longitudinal wave
Sound travels as a longitudinal wave, where particle displacement is parallel to the direction of wave propagation.
What is the approximate speed of light in a vacuum?
Answer: 300,000 km/s
Light travels at approximately 300,000 kilometers per second (about 186,000 miles per second) in a vacuum.
Which of the following is an example of a chemical change rather than a physical change?
Answer: Iron rusting on a fence
Rusting is a chemical change because iron reacts with oxygen and water to form iron oxide, a new substance with different properties.