COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 27, Problem 32QAP
To determine
The mass of an object which has a size of basketball that has the density of an atomic nucleus.
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One mole of atoms consists of 6.02 × 1023 individual atoms. If one mole of unicorn atoms were spread uniformly over the surface of a sphere the size of the Earth, approximately how many atoms would be found per square meter? The average radius of the Earth is 6.38 × 103 km.
Chapter 27 Solutions
COLLEGE PHYSICS
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- The nucleus of an atom can be modeled as several protons and neutrons closely packed together. Each particle has a mass of 1.67 x 10-27 kg and radius on the order of 10-15 m. (a) Use this model and the data provided to estimate the density of the nucleus of an atom. | kg/m³ (b) Compare your result with the density of a material such as iron w = 7874 kg/m?). What do your result and comparison suggest about the structure of matter?arrow_forwardOne mole of atoms consist of 6.02 × 10^23 individual atoms. If one mole of unicorn atoms were spread uniformly over the surface of a sphere the size of the Earth, approximately how many atoms would be found per square meter? The average radius of the Earth is 6.38 × 10^3 km.arrow_forwardthe average density of an atom is approximately 103 kg/m3. The nucleus of an atom has a radius about 10-5 times that of the entire atom, and contains nearly all the mass of the atom. What is the approximate density, in kilograms per cubic meter, of a nucleus?arrow_forward
- @ /Calculate the value of (x) ( x,t) - cos (kx-wt)+ xin (kx-wt) Satisfy the following equation 2² 4 əx² α +v=B a at Įarrow_forward(a) Calculate the approximate number of atoms in a single sheet of 0.01 lb paper. Note that a single carbon atom is about 2×10-26 kg in mass and 1 lb is approximately 4.448 N. (b) Estimate to order of magnitude the total mass of paper used by a typical class throughout a semester.arrow_forwardCalculate the approximate number of atoms in a bacterium. Assume the average mass of an atom in the bacterium is 10 times the mass of a proton.arrow_forward
- How many times longer than the mean life of an extremely unstable atomic nucleus is the lifetime of a human? (Hint: The lifetime of an unstable atomic nucleus is on the order of 10-22 s.arrow_forwardIn the fall of 2002, scientists at Los Alamos National Laboratory determined that the critical mass of neptunium-237 is about 60 kg. The critical mass of a fissionable material is the minimum amount that must be brought together to start a nuclear chain reaction. Neptunium-237 has a density of 19.5 g/cm3. What would be the radius of a sphere of this material that has a critical mass?arrow_forwardThe graph below shows the number of grams of a radioactive element t days after it was first discovered in a science lab. Estimate the instantaneous rate of change of the number of grams of this object at 5 days. +201 19 18 17 16 16 .. 14 19 12 # 10 。 s The numerical part of the instantaneous rate of change is with units For the units, enter full words. For example, if it was kph, you would say kilometers per hour. Or if it was you would say meters per seconds squared. m 2 8²arrow_forward
- The rate of decay of the radioactive isotope Free Neutron 239 is given by: M = -1.1 x 10-³M where M is the mass of the isotope in grams and t is time measured in minutes. A sample initially contains 3 grams of the isotope. What is the mass of the isotope present in the sample after 320 minutes? The mass is grams. Round your answer to 3 significant figures, if needed. b) How long does it take for the mass of the isotope in the sample to fall to 1.5 gram? It takes t = minutes. Round your answer to the nearest integer if needed.arrow_forwardThe rhinovirus, one cause of common cold and flu, has a diameter of 30 nm. How many of these particle could line up side by side on a line that is 1.0 inch long?arrow_forwardThe nucleus of an atom can be modeled as several protons and neutrons closely packed together. Each particle has a mass of 1.67 x 1027 kg and radius on the order of 10-15 m. (a) Use this model and the data provided to estimate the density of the nucleus of an atom. kg/m3arrow_forward
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