<u>Answers</u>
<u>part 1</u>
Density of a substance is the ratio of mass of a unit volume of that substance.
Density = mass/volume
volume of a sphere = 4/3× πr³
Volume of the neutron = 4/3 × π × (1×10⁻¹³)³
= 4.18879 × 10⁻³⁹ cm³
mass of a neutron = 1.674929 x 10⁻²⁷ kg
= 1.674929 x 10⁻²⁴ g
density = (1.674929 x 10⁻²⁴)/( 4.18879 × 10⁻³⁹)
= 3.999 × 10¹⁴ g/cm³
Answer to 2 significant figures = 4.0 × 10¹⁴ g/cm³
<u>Part 2</u>
density of neutron star= 4.0 × 10¹⁴ g/cm³
Radius = 0.30 mm = 0.03 cm
volume = 4/3 × π × 0.03³
= 1.13097 × 10⁻⁴ cm³
mass = density × volume
= 4.0 × 10¹⁴ × 1.13097 × 10⁻⁴
= 4.52388 × 10¹⁰ g
Answer to 2 significant figure = 4.5 × 10¹⁰ g
Answer:
The slope of the position time graph gives the velocity.
Explanation:
The slope of the position time graph gives the value of velocity.
In first graph,
The slope is constant in both the parts but positive . So the velocity is also constant and positive for both the parts. and more than the second part, so the initial velocity is more than the final velocity.
In the second graph,
The slope is constant in both the parts but negative. So, the velocity is constant but negative for both the parts. Initial velocity is more negative than the final velocity.
Yes it is possible to do that
Answer:
(a) Q = 142.67 W
(b) Basal Metabolic Rate = 178.33 W
Explanation:
(a)
We can find the heat radiated by the person by using Stefan-Boltzman's law:
where,
Q = heat radiated per second = ?
σ = Stefan-Boltzman Constant = 5.6703 x 10⁻⁸ W/m².k⁴
A = Surface Area = 2 m²
T = Temperature of Skin = 30° C + 273 = 303 k
Ts = Temperature of room = 18° C +273 = 291 k
Therefore,
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<u>Q = 142.67 W</u>
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(b)
Since the heat calculated in part (a) is 80 percent of basal metabolic rate. Therefore,
<u>Basal Metabolic Rate = 178.33 W</u>