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2 years ago

A physical quantity, G, is defined by G = (Original mass x time)/(change in mass), what is the S.I. unit of G ?

1 answer:

4 0

The gravitational constant (G) in its base SI units is

3/2
m
3
k
g
/
s
2

But is often seen written as

⋅
N
⋅
2/2
m
2
/
k
g
2

Where N is the Newton unit. N=kg ⋅
⋅
m/s 2
2

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In 2009, NASA's Messenger spacecraft became the second spacecraft to orbit the planet Mercury. The spacecraft orbited at a heigh

oee [108]

Answer:

Explanation:

height, h = 125 miles = 125 x 1609 m = 201125 m = 0.2 x 10^6 m

Rdaius, R = 2.44 x 10^6 m

Mass, M = 3.3 x 10^23 kg

Let vo be the orbital speed.

The formula for the orbital speed is given by

$v_{o}=\sqrt{\frac{GM}{R+h}}$

where, M is the mass of mercury, R be the radius of mercury

$v_{o}=\sqrt{\frac{6.67\times10^{-11}\3.3\times 10^{23}}{2.64\times 10^{6}}$

vo = 2887.47 m/s

Time period, T = 2π(R+h) / vo

T = 2 x 3.14 x 2.64 x 10^6 / 2887.47

T = 5741.77 seconds

T = 1.6 hours

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3 years ago

What is the definition for the term density

horrorfan [7]

Density can be defined as the measure of mass of a substance per unit volume.

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3 years ago

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An object on a number line moved from x = 15 cm to x = 165 cm and then

olasank [31]

Answer:

v_avg = 2.9 cm/s

Explanation:

The average velocity of the object is the sum of the distance of all its trajectories divided the time:

$v_{avg}=\frac{x_{all}}{t}$

x_all is the total distance traveled by the object. In this case you have that the object traveled in the first trajectory 165cm-15cm = 150cm, and in the second one, 165cm - 25cm = 140cm

Then, x_all = 150cm + 140cm = 290cm

The average velocity is, for t = 100s

$v_{avg}=\frac{290cm}{100s}=2.9\frac{cm}{s}$

hence, the average velocity of the object in the total trajectory traveled is 2.9 cm/s

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3 years ago

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What causes the different colors of visible light in the electromagnetic spectrum?

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Answer:

The color of the light is determined by the frequency of the light wave. Red, is lowest, frequency and violet is the highest.

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4 years ago

Simplified. The absorption spectra of ions have been used to identify the presence of the elements in the atmospheres of the sun

Nookie1986 [14]

Answer:

The answer is " $3.83 \times 10^9 \ m$ "

Explanation:

Z=2, so the equation is $E= \frac{-4B}{n^2}$

Calculate the value for E when:

n=2 and n=9

The energy is the difference in transformation, name the energy delta E Deduct these two energies

In this transition, the wavelength of the photon emitted is:

$\Delta E=2.18 \times 10^{-18} ( \frac{1}{4}- \frac{1}{81})$

$\lambda = \frac{h c}{\Delta E}$

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3 years ago