The point of this question is to compare rest energy and kinetic energy at high speeds.An alpha particle (a helium nucleus) is moving at a speed of 0.9994 times the speed of light. Its mass is (6.40 x 10-27 kg).(a) What is its rest energy? 5.75e-10(b) Is it okay to calculate its kinetic energy using the formula mv2?O No, because this formula isn't valid for speeds near the speed of light.O Yes, because v << c.O Yes, because the formula mv² for kinetic energy is always correct.(c) What is its kinetic energy?(d) Which is true?O The kinetic energy is approximately equal to the rest energy.O The kinetic energy is much bigger than the rest energy.O The kinetic energy is much smaller than the rest energy. One mole of helium atoms has a mass of 4 grams. If a helium atom in a balloon has a kinetic energy of 1.666e-21 J, what is the speed of the helium atom? (The speed is much lower than the speed of light.)V =m/sAdditional MaterialsO eBook

Given:- mass = (6.40 x 10-27 kg) Speed = 0.9994 C where C is the speed of light Find:- a) The…

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University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter5: Relativity

Section: Chapter Questions

Problem 70P: Alpha decay is nuclear decay in which a helium nucleus is emitted. If the helium nucleus has a mass...

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w = FjAc = F .Aë , W = m(v;)* - m(u,)* , v 1 zm(us)* - m(v,)* , W = Problem 1: (a) Ã = 3â – 2ŷ, B = 4â& – 5ŷ. Ã ·B =? Answer: 22 (b) Ã = -2â + 4ŷ, B = 3âu – lŷ. Ā·B =? Answer: –10 (c) Ã = 5â – 3ŷ, B = -3â – 5ŷ. Ã·B =? Answer: 0 1 | F,dx , W = F. dř , F, dU W = -AU dx d = 4m F = 20 N 0 = 30° m = 4 kg Hk = 0.5) m = 2 kg F = 40 N Hk = 0.2 Ө — 30° Problem 2: In the figure above on the left we have a force F = 20 N pulling a box to the right at an angle 0 = 30° above the horizontal. The box has a mass m = 2 kg, the coefficient of kinetic firction between the box and the ground is uk = 0.2, and the block moves a distance d = 4 m to the right. (a) What is the work done by the force F? Answer: 69.3 J (b) What is the normal force from the ground? Use g = 10 m/sec² Answer: 10 N (c) What is the work done by the kinetic friction force? Answer: -8 J (d) What is Wnet, the net work done on the box? Answer: 61.3 J (e) The box has an initial speed of 4 m/sec. What is the speed of the box after it has…
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Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth?
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Earth has a mass of 5.98*1024 kg.The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth?

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