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Andrej [43]
2 years ago
10

What forces contribute to density

Physics
1 answer:
mixer [17]2 years ago
5 0
No force contributes to density, the density is a physical quantity that is defined as being \rho = m/V 
 the raport between the mass of the object and its volume. However if you want to measure the density of an object you might want to determine its gravity force (weight) G=mg from which knowing the gravitational acceleratin you can find its mass m=G/g
 
where G is given in Newtons and g=9.81 is given in  (m/s^2)


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Who was the first person referred to as a psychologist?
musickatia [10]

Answer:

Wilhelm Wundt

Explanation:

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3 years ago
NaBr + CaF2 - NaF + CaBrz<br> es<br> What coefficients are needed to balance the chemical equation?
Dovator [93]

Answer:

4NaBr + 2CaF2 ---------- 4 NaF + 2CaBrz

Explanation:

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3 years ago
In deep space, sphere A of mass MA is located at the origin of an x axis and sphere B of mass MB is located on the axis at a poi
Nookie1986 [14]

Answer:

The gravitational potential energy of the two-sphere system just as B is released is

U = -[(G)(MA)(MB)/x₁]

where G = Gravitational constant

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Explanation:

The gravitational potential energy of two masses (m and M), separated by a distance, d, is given as

U = -(GMm/d)

For our question,

Mass of object 1 = MA

Mass of object 2 = MB

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U = -[(G)(MA)(MB)/x₁]

where G = Gravitational constant

G = (6.7 × 10⁻¹¹) Nm²/kg²

Hope this Helps!!!

6 0
3 years ago
A plane electromagnetic wave, with wavelength 2.8 m, travels in vacuum in the positive direction of an x axis. the electric fiel
Arte-miy333 [17]
Ok first you gotta know what they are actually even asking you.

Frequency = <em>wavelengths per second
</em>Angular Frequency = <em>radians per second
</em>Wave Number = <em>wavelengths per meter
</em>Angular Wave Number = <em>radians per meter</em>
<em /><em />
Frequency is Easy, just divide the speed of light by the wavelength. This is your answer for A.

Angular frequency is how many radians per second the ELECTRIC FIELD moves through over one second. We know that there are 2π radians in one wavelength.

So to get the angular frequency just multiply the regular frequency by 2π (6.28) to get the frequency in terms of radians per second (<em>instead of waves per second</em><em />). This is your answer for B.

The wave number of a photon is how many waves <em>per meter</em> the photon moves through rather than waves <em>per second</em><em>, </em>similar but different to the 'frequency' calculations above.

Simply find the waves per meter (1 meter divided by the <em>wavelength</em>) and multiply by 2π to get the <em>radians per meter</em><em />. this is your answer for C.

NOTE: make sure your units are all correct, wavelength in meters, frequency in Hz etc...


3 0
2 years ago
A girl is riding her bike at a speed of 12 m/s. She weighs 55 kg and her bike weighs 22 kg. What is the KE of the girl and her b
romanna [79]

Answer:Kinetic energy of the girl and her bike is 5.544 kJ

Explanation:

Given that a girl is riding bike at speed of 12m/s

Also, mass of Girl is 55kg and mass of bike is 22kg

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Now, Kinetic energy is given by K=

Hence, Kinetic energy of the girl and her bike will be

K=

K=

K=5544J

Thus, Kinetic energy of the girl and her bike is 5.544 kJ

4 0
3 years ago
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