4 (a) The Sun has a mass of 2.0 x 10^30 kg - Edexcel - GCSE Physics - Question 4 - 2020 - Paper 1
Question 4
4 (a) The Sun has a mass of 2.0 x 10^30 kg.
A white dwarf has a mass of 3.4 x 10^29 kg.
Calculate the value of
mass of this white dwarf
mass of the Sun
(2)
(b) Fi... show full transcript
Worked Solution & Example Answer:4 (a) The Sun has a mass of 2.0 x 10^30 kg - Edexcel - GCSE Physics - Question 4 - 2020 - Paper 1
Step 1
Calculate the value of mass of this white dwarf mass of the Sun
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Answer
To find the ratio of the mass of the white dwarf to the mass of the Sun, we use the formula:
ext{ratio} = rac{ ext{mass of the white dwarf}}{ ext{mass of the Sun}} = rac{3.4 imes 10^{29} ext{ kg}}{2.0 imes 10^{30} ext{ kg}} = 0.17
Thus, the value is 0.17.
Step 2
Estimate the temperature of the Sun.
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Answer
From the diagram in Figure 4, the temperature of the Sun is estimated to be around 5800 K. This is within the accepted range of 5500 to 7500 K.
