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Brut [27]
3 years ago
14

If the force of gravity between a book of mass 0.50 kg and a calculator of 0.100 kg is 1.5 × 10-10 N, how far apart are they?

Physics
1 answer:
Nady [450]3 years ago
5 0
m_1=0,5kg \\ m_2=0,1kg \\ F=1,5*10^{-10}N \\ G=6,67*10^{-11}m^3/kg*s^2 \\  \\ r=? \\  \\  \\ F= \frac{Gm_1m_2}{r^2 }  \\  \\ Fr^2=Gm_1m_2 \\  \\r^2=\frac{Gm_1m_2}{F}  \\  \\ r= \sqrt{\frac{Gm_1m_2}{F} } = 


=\sqrt{ \frac{6,67*10^{-11} \frac{m^3}{kg*s^2}*0,5kg*0,1kg }{1,5*10^{-10}N} }  = \sqrt{ \frac{6,67*10^{-11} \frac{m^3}{kg*s^2}*0,05kg^2 }{1,5*10^{-10} \frac{kg*m}{s^2} } }  =  \\  \\ =\sqrt{ \frac{6,67 *10^{-11}*0,05 }{1,5*10^{-10}}m^2 }  \approx\boxed{0,15m}  \\  \\  \\  \\  \\  \\ "Non\ nobis,\ Domine,\ non\ nobis,\ sed\ Nomini\ tuo\ da\ gloriam." \\  \\  \\  \\ \underline{\underline{Regards\ M.Y.}}

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NEED HELP
ch4aika [34]

Answer: C.

Explanation:

Just took quiz

8 0
2 years ago
What total mass must be converted into energy
Eduardwww [97]

This question apparently wants you to get comfortable
with  E = m c² .  But I must say, this question is a lame
way to do it.

c = 3 x 10⁸ m/s
                                                    E = m c²

                           1.03 x 10⁻¹³ joule  =  (m) (3 x 10⁸ m/s)²

Divide each side by (3 x 10⁸ m/s)²:

                         Mass = (1.03 x 10⁻¹³ joule) / (9 x 10¹⁶ m²/s²)

                                   =  (1.03 / 9) x (10⁻¹³ ⁻ ¹⁶) (kg)

                                   =        1.144 x 10⁻³⁰  kg .    (choice-1)

This is roughly the mass of (1 and 1/4) electrons, so it seems
that it could never happen in nature.  The question is just an
exercise in arithmetic, and not a particularly interesting one.
______________________________________

Something like this could have been much more impressive:
 
The Braidwood Nuclear Power Generating Station in northeastern
Ilinois USA serves Chicago and northern Illinois with electricity.
<span>The station has two pressurized water reactors, which can generate
a net total of 2,242 megawatts at full capacity, making it the largest
nuclear plant in the state.
If the Braidwood plant were able to completely convert mass
to energy, how much mass would it need to convert in order
to provide the total electrical energy that it generates in a year,
operating at full capacity ?

Energy = (2,242 x 10⁶ joule/sec) x (86,400 sec/day) x (365 da/yr)

             =  (2,242 x 10⁶ x 86,400 x 365) joules

             =          7.0704 x 10¹⁶ joules .

How much converted mass is that ?

                                           E  =  m c²

Divide each side by  c² :    Mass  =  E / c² .
c = 3 x 10⁸ m/s

              Mass = (7.0704 x 10¹⁶ joules) / (9 x 10¹⁶ m²/s²)

                        =        0.786 kilogram ! ! !

THAT should impress us !  If I've done the arithmetic correctly,
then roughly  (1 pound  11.7 ounces) of mass, if completely
converted to energy, would provide all the energy generated
by the largest nuclear power plant in Illinois, operating at max
capacity for a year !

</span>
7 0
3 years ago
Read 2 more answers
An open organ pipe is 1.6m long. If the speed of sound is 343m/s, what are the pipes: a) fundamental , b) 1st overtone , &amp; c
Yakvenalex [24]

Answer:

a) 107.1875 Hz

b) 214.375 Hz

c) 321.5625 Hz

Explanation:

L = length of the open organ pipe = 1.6 m

v = speed of sound = 343 m/s

f = fundamental frequency

fundamental frequency is given as

f = \frac{v}{2L}

inserting the values

f = \frac{343}{2(1.6)}

f = \frac{343}{2(1.6)}

f = 107.1875 Hz

b)

first overtone is given as

f' = 2f

f' = 2 (107.1875)

f' = 214.375 Hz

c)

first overtone is given as

f'' = 3f

f'' = 3 (107.1875)

f'' = 321.5625 Hz

3 0
3 years ago
Please help on this one?
butalik [34]

B. +Q, + W are the correct sign

7 0
2 years ago
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Why mirrors show texts in reverse order?
bogdanovich [222]
Mirrors reflect meaning shows what would be seen if everything was turned around, therefore, it shows text backwards because if it is turned around, it is in reverse order.
7 0
2 years ago
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