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Physics

Mark Greenholt ∙

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Term1/9

How much heat is needed to raise 8 kg of water from 4 degrees Celsius to 83 degrees Celsius

Definition1/9

2,641,760J...

Term1/9

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

Definition1/9

v=f*wavelength v=2*.5 v=1 m/s

Term1/9

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

Definition1/9

2,250 joules

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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

Definition1/9

Reff = R1*R2 / (R1+R2)

if you follow this for all three, you will end up with 20 ohms.

Term1/9

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

Definition1/9

Formula is velocity=frequency X wavelength

so Wavelength = 5m

Term1/9

Sound travels the slowest through which of these

Definition1/9

Air

Term1/9

What is the speed of a sound wave that has a wavelenght of 102 meters and a frequency of 250hz

Definition1/9

speed = wavelength * frequency wavelength = 102 meters

frequency = 250 Hz = 250 cycles/second

102 * 250 = 25500 meters/second

Term1/9

As frequency increases the energy of a wave increases or decreases

Definition1/9

As frequency increases the energy of a wave also increases.

Term1/9

The lower range of human hearing is approximately Hz.

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20, for a+ users

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Cards in this guide (9)

How much heat is needed to raise 8 kg of water from 4 degrees Celsius to 83 degrees Celsius

2,641,760J...

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

What is the speed of a sound wave that has a wavelenght of 102 meters and a frequency of 250hz

speed = wavelength * frequency wavelength = 102 meters

frequency = 250 Hz = 250 cycles/second

102 * 250 = 25500 meters/second

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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How much heat is needed to raise 8 kg of water from 4 degrees Celsius to 83 degrees Celsius

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

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

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