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1. Physics mass-energy imbalance question!?

Helium /Atomic mass 4.002602 u, and C 12.0107 u He (4.002602) x 3 = 12.007806 g He - C = 12.007806 g - 12.0107 g = -0.002894 g (mass lost) E = mc² = 0.002894 g(1kg/1000g) *299792458)² = 2.60100 × 10 ^11 J

1 Answers · Science & Mathematics · 10/10/2020

2. What is the final pressure of helium and neon gas mixture in this case?

(( 10 .0 mol x 5.00 bar) + (5.00 mol x 20.0 bar)) / ( 10 .0 mol + 5.00 mol) = 10 .0 bar

2 Answers · Science & Mathematics · 04/10/2020

3. What wavelength (in nm) is observed when an electron in a helium atom transitions from n=3 to n=2?

Atomic number of helium , Z = 2 Rydberg constant, R = 1.097 × 10⁷ m⁻¹ = 1.097 × 10 ⁻² nm⁻¹ n₂ = 3 to n₁ = 2 Rydberg equation...

1 Answers · Science & Mathematics · 22/09/2020

4. How could atoms come to life?

... DNA, 1 million time's that in each cell, and 10 ^14 cells in our bodies = 2 x10^31 ... up and formed a few other atoms such as helium .  Some atoms fused together to make...

2 Answers · Science & Mathematics · 16/09/2020

5. In the very advanced future can sun be artificially inflated with hydrogen to keep it going forever?

...people realize that our Sun will only use up ~ 10 % of its Hydrogen during its entire lifetime...'s core accumulates more and more Helium over time, and this Helium makes the core get...

14 Answers · Science & Mathematics · 26/08/2020

6. Could you help me with Physics II?

...and velocity, so we just use K = 1/2 mv^2. K = 1/2 mv^2 = 1/2 * 6.64* 10 ^-27 kg * (2.5 * 10 ^6 m/s)^2 = 2.075* 10 ^-24 J Now we can use the...

1 Answers · Science & Mathematics · 22/07/2020

7. How can we see 46 billion light years in space if Earth is less than 6 billion years old? (please read whole question below)?

...13.8 billion light-years. 3. Roughly 8 to 10 billion years ago, within our already existing... clouds of gas (mostly hydrogen, some helium ) and "dust" (anything else blown out into space...

32 Answers · Science & Mathematics · 26/10/2020

8. Help with a Physics question.?

Your translation is adequate! potential energy becomes kinetic energy: q * potential = ½mv² 2*1.6e-19C * 1.2e6V = ½ * 6.64e-27kg * v² solves to v = 1.1e7 m/s which is < 4% of the speed of light, so we can ignore...

1 Answers · Science & Mathematics · 08/02/2020

9. Can a planet exist that is 2x Earths radius and has a mass of 10 Earths and be a rocky planet or not?

...have 8 times its volume. With a mass of 10 times Earths, its density would be 1.25...in the inner region. There is less hydrogen and helium gas in inner region than in the outer regions.

5 Answers · Science & Mathematics · 16/11/2019

10. physics 2 question?

...2.9e23 m/s² Note that "e23" is shorthand for "x 10 ^-23". If you find this helpful, please award Best Answer!

3 Answers · Science & Mathematics · 28/08/2019