pascals and archimedes principle
This law states that pressure applied to an enclosed fluid is transmitted equally in all directions:
A) Archimedes' Principle
B) Bernoulli's Principle
C) Pascal's Principle
D) Ohm's Law
C) Pascal's Principle
Materials like copper and aluminum that allow electric charges to flow freely are called:
A) Insulators
B) Conductors
C) Resistors
D) Capacitors
B. Conductors
In a series circuit with multiple light bulbs, if one bulb burns out, what happens to the others?
A) The rest get brighter
B) The rest stay the same
C) All bulbs go out
D) The circuit draws double current
C) All bulbs go out
Which property of a sound wave is most directly associated with its pitch?
A. Amplitude
B. Frequency
C. Wavelength
D. Speed
B) Frequency
Sound frequencies above 20,000 Hz are beyond human hearing and are classified as:
A) Infrasound
B) Ultrasound
C) Resonance
D) Subsonic
B) Ultrasound
True or False:the buoyant force on an object submerged in water is equal to the weight of the fluid displaced by that object.
True
True or False: The Law of Conservation of Charge states that electric charge can be destroyed if a short circuit occurs.
False
True or False: Adding more resistors in parallel decreases the overall equivalent resistance of the circuit.
True
True or False: According to the Law of Reflection, the angle of incidence is always equal to the angle of reflection.
True
True or False: Active noise-canceling headphones utilize constructive interference to eliminate external noise.
False (They use destructive interference)
What is the term for the upward force exerted by a fluid on a submerged or floating object?
Buoyant Force
A material that allows electric current to pass through it easily.
Conductor
What type of electrical pathway features multiple branches, giving current more than one route to follow?
Parallel Circuit
What is the term for the bending of a light wave as it passes from one medium into another of different optical density?
Refraction
What is the typical frequency range of sound audible to normal human hearing?
20 Hz to 20,000 Hz
What property of hydraulic fluid requires it to be enclosed and unable to compress so force transfers effectively?
Incompressibility
The flow of electric charges through a conductor.
Electric Current
Which circuit configuration uses the formula Rtotal = R1 + R2 + R3 to calculate total resistance?
Series Circuit
The form of energy that allows us to see objects and travels in straight lines in a uniform medium.
Light energy (light)
A form of energy produced by vibrating objects and transmitted through a medium.
Sound energy (sound)
An object weighs 800 N in air and 630 N when submerged in water. Calculate the buoyant force acting on it.
170 N
A 120 V electric appliance draws a current of 2 A. Calculate the total energy it consumes if it operates for 5 hours.
P=VI P=(120)(2)=240W
E=Pt E=(240)(5) E=1,200 Wh
A 12-V battery is connected to three parallel resistors with values of 6ohms, 3 ohms, and 2 ohms. Calculate the total current supplied by the battery.
12A
Light travels at 2.0x 10 ^8 m/s inside a glass block. Given that the speed of light in a vacuum is 3.0x10^8 calculate the refractive index of the glass.
n=1.5
An ambulance siren emits a sound at 700 Hz as it approaches a stationary observer at 20 m/s. If the speed of sound in air is 343 m/s, calculate the frequency heard by the observer.
aproximately 743.3 Hz