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☆☆☆☆☆Cards in this guide (10)
How much heat is needed to raise 8 kg of water from 4 degrees Celsius to 83 degrees Celsius
2,641,760J...
The Frequency of light is very fast and the wavelength is very short
True...
The relationship between the angle of incidence and the angle of refraction is known as law
Snell law.
Waves with a frequency of 2.0 hertz are generated along a string The waves have a wavelength of 0.50 meters The speed of the waves along the string is
v=f*wavelength v=2*.5 v=1 m/s
A 45 kg skater is skating down a hill on roller blades at a a speed of 10 ms what is the kinetic energy of the skater
2,250 joules
A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt power source What is the effective resistance of the three resistors
Reff = R1*R2 / (R1+R2)
if you follow this for all three, you will end up with 20 ohms.
The speed of sound in water is 1430 ms Find the wavelength of a sound with a frequency of 286 Hz traveling through the water
Formula is velocity=frequency X wavelength
so Wavelength = 5m
Sound travels the slowest through which of these
Air
As frequency increases the energy of a wave increases or decreases
As frequency increases the energy of a wave also increases.
The lower range of human hearing is approximately Hz.
20, for a+ users
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