Determine the kinetic energy of (a) a 1.25-kg mass moving at 5.75 m/s, (b) a car weighing 3250 lb moving at 35 mph, (c) an electron moving at 475 m/s, (d) a helium atom moving at 725 m/s.
(a)
Interpretation:
Kinetic energy should be calculated in the given statement by using the equation of kinetic energy
Concept Introduction:
Energy is the capacity to do work or transfer heat where work is the movement of a body using some force. The SI unit of energy is joule (
Where,
Explanation of Solution
To find: Determine the kinetic energy of a
Kinetic energy (in joule) is calculated using the formula:
Where,
Therefore, the kinetic energy of a
(b)
Interpretation:
Kinetic energy should be calculated in the given statement by using the equation of kinetic energy
Concept Introduction:
Energy is the capacity to do work or transfer heat where work is the movement of a body using some force. The SI unit of energy is joule (
Where,
Explanation of Solution
To find: Determine the kinetic energy of a car weighing
Kinetic energy (in joule) is calculated using the formulae:
Where,
The mass of the car in kilograms is
The velocity of the car in meters per second is
Substitute the given values in the formula,
Therefore, the kinetic energy of a car weighing
(c)
Interpretation:
Kinetic energy should be calculated in the given statement by using the equation of kinetic energy
Concept Introduction:
Energy is the capacity to do work or transfer heat where work is the movement of a body using some force. The SI unit of energy is joule (
Where,
Explanation of Solution
To find: Determine the kinetic energy of an electron moving at
Kinetic energy (in joule) is calculated using the formulae:
Where,
The mass of an electron in kilograms is
Substitute the given values in the formula,
Therefore, the kinetic energy of an electron moving at
(d)
Interpretation:
Kinetic energy should be calculated in the given statement by using the equation of kinetic energy
Concept Introduction:
Energy is the capacity to do work or transfer heat where work is the movement of a body using some force. The SI unit of energy is joule (
Where,
Explanation of Solution
To find: Determine the kinetic energy of a helium atom moving at
Kinetic energy (in joule) is calculated using the formulae:
Where,
The mass of a helium atom in kilograms is
Substitute the given values in the formula,
Therefore, the kinetic energy of a helium atom moving at
Want to see more full solutions like this?
Chapter 3 Solutions
Chemistry: Atoms First
- A helium-filled balloon spontaneously deflates overnight as He atoms diffuse through the wall of the balloon. Describe the redistribution of matter and/or energy that accompanies this process.arrow_forwardLiquid hydrogen peroxide has been used as a propellant for rockets. Hydrogen peroxide decomposes into oxygen and water, giving off heat energy equal to 686 Btu per pound of propellant. What is this energy in joules per gram of hydrogen peroxide? (1 Btu = 252 cal; see also Table 1.4.)arrow_forwardA green laser beam with a wavelength l = 532 nm has an energy of 3.85 x 10–3 J per pulse. What is the energy density of the laser expressed in term number of photon per pulse? (Planck constant, h = 6.63 x 10–34J.s; speed of light, c = 3.00 x 108 m/s; 1 nm = 10–9 m) (A) 5.81 x 1024 (B) 1.03 x 1025 (C) 1.03 x 1016 (D) 2.67 x 1015arrow_forward
- An electron is accelerated through an electric potential to a kinetic energy of 2.24 × 10-15 J.arrow_forwardClassify the following as either a fermion or a boson: (a) an electron. (b) a proton. (c) a neutron. and (d) a photon.arrow_forwardSuppose a system of two particles, represented by circles, have the possibility of occupying energy states with 0, 10, or 20 J. Collectively, the particles must have 20 J of total energy. One way the two particles can distribute themselves is: 20 J 10 J 00 0 J Are there any other energetically equivalent configurations? Give your answer in the form (x;y) in Joules without the units. If there is more than one answer, separate them by commas. If there is no answer, enter none. (0:20).(20;0) Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remainingarrow_forward
- From Einstein’s most famous equation, how much energy in British therrmal unit (btu) can theoretically be released from 38 moles of hydrogen gas? [1 btu=1055.056 joules], [1 Joule = 1kg m²/s²]arrow_forwardCalculate the average atomic mass of Amazium, a newly discovered element (Amazium, symbol Az) which is determined by mass spectrometry to have two isotopes with the following masses and percent (%) composition (abundance) Show work.arrow_forward. In a mixture of the gases oxygen and helium, which statement is valid?(a) The helium atoms will be moving faster than theoxygen molecules, on average.(b) Both will be moving at the same speed.(c) The oxygen molecules will, on average, be movingmore rapidly than the helium atoms.(d) The kinetic energy of helium atoms will exceed that ofoxygen molecules.(e) None of the above.arrow_forward
- The human eye is a complex sensing device for visible light.The optic nerve needs a minimum of 2.0X10¹⁷J of energy totrigger a series of impulses that eventually reach the brain.(a) How many photons of red light (700. nm) are needed?(b) How many photons of blue light (475 nm)?arrow_forwardElectromagnetic radiation with a wavelength of 575 nm appears as yellow light to the human eye. If a laser emits 3.8 x 1016 photons of this energy in a pulse, what is the energy of the pulse in mJ?arrow_forwardW 4. (a) A laser emits light that has a frequency of 4.69 X 10¹4 s¹. What is the energy of one photon of this radiation? V (b) If the laser emits a pulse containing 5.0 X 1017 photons of this radiation, what is the total energy of that pulse? (c) If the laser emits 1.3 X 10-2 J of energy during a pulse, how many photons are emitted?arrow_forward
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning