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Rom4ik [11]
3 years ago
13

By what factor will the acceleration due to gravity change if the mass of a planet is doubled and the size of the planet is also

doubled?

Physics
1 answer:
stiks02 [169]3 years ago
3 0

Answer:

The answer is given in the attacted image.

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Which method can be used for separating a mixture of sand and salt?
Veronika [31]
Answers A and C can be automatically eliminated because evaporation has to do with the water cycle and magnetism has to do with electric current and such. Next we can eliminate B or distillation because it also has to do with water/liquids. Therefore, the answer is D or filtration because it is the only answer left.

I hope this helps!
6 0
2 years ago
Read 2 more answers
Calculate the amount of heat (in kJ) required to convert 97.6 g of water to steam at 100° C. (The molar heat of vaporization of
Ratling [72]

Answer:

221.17 kJ

Explanation: Note the heat of vaporization is in kJ/mol,then to determine the number of moles of water: divide the mass by 18. Then multiply the number of moles by the molar heat of vaporization of water.

N = 97.6 ÷ 18

Q=molar heat *moles

Q = (40.79) * (97.6 ÷ 18)

This is approximately 221.17 kJ

4 0
2 years ago
You walk 45 m to the north, then turn 90° to your right and walk another 45 m How far are you from where you originally started?
docker41 [41]
C^2=a^2+b^2
c^2=45^2+45^2
c^2=4050
c=63.64
c=64
The answer is D.
3 0
3 years ago
It takes 4.0 eV to excite an electron in a box from the ground level to the first excited level. What is the width L of the box?
AveGali [126]

To solve this problem we will use the concept related to electrons in a box which determines the energy of an electron in that state.

Mathematically this expression is given by,

E_n= \frac{n^2h^2}{8mL^2}

Where,

m = mass of an electron

h = Planck's constant

n = is the integer number of the eigenstate

L = Quantum well width

The change in energy must be given in state 1 and 2, therefore

\Delta E = E_2 - E_1

\Delta E = \frac{2^2h^2}{8mL^2}-\frac{1^2h^2}{8mL^2}

\Delta E = \frac{3h^2}{8mL^2}

Replacing we have:

(4*1.6*10^{-19}) = \frac{3(6.626*10^{34})}{8*(9.11*10^{-31})*L^2}

L = 0.53nm

Therefore the correct answer is C.

6 0
3 years ago
The amount of matter in an object is called its weight true or false
Deffense [45]

Answer:

true

Explanation:

logic

4 0
2 years ago
Read 2 more answers
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