Questions tagged 'Energy'
32 questions
first law of thermodynamics?
An egg is initially at rest and is dropped onto a concrete surface, resulting in its breakage. Treating the egg as a system, please address the following: a. What is the sign of work (W)? b. What is t...
A mole of red photon of wavelength 725nm has how much KJ?
A mole of red photons with a wavelength of 725 nm has how much energy in kilojoules (kJ)? Here’s what I have done so far: I converted the wavelength from nanometers to meters: ( 725 \, \text{n...
Classify each of the following characteristics as related to fusion, fission, or both?
Classify each of the following characteristics as pertaining to fusion, fission, or both: Occurs in the sun Used in nuclear power plants Byproducts have long half-lives Requires extremely high tempe...
What is the difference between G30 and G31 LPG?
We know that there are two types of LPG: G30 and G31. Could you explain the differences between these two types of LPG?
Which equation turns food into energy?
Which equation describes how food is converted into energy? Consider the following processes: Photosynthesis: [ 6CO_2 + H_2O + \text{light energy} \rightarrow C_6H_{12}O_6 + 6O_2 ] Cellular...
Feb 08, 2025
A spring has a spring stiffness constant k of 70.0N/m .?
What compression is required for a spring with a stiffness constant (k) of 70.0 N/m to store 50.0 J of potential energy?
Feb 08, 2025
does Pe = Ke?
The question "Does Pe equal Ke?" is quite brief and lacks context. To enhance clarity and provide a more engaging inquiry, I suggest the following revision: "In the context of physics, can we equate p...
Feb 08, 2025
The energy of a photon that has a frequency of 18.21 × 1015 s-1 is __________ J.?
What is the energy of a photon with a frequency of 18.21 × 10¹⁵ s⁻¹? a. 5.44 × 10⁻¹⁸ J b. 1.99 × 10⁻²⁵ J c. 3.49 × 10⁻⁴⁸ J d. 1.21 × 10⁻¹⁷ J e. 5.44 × 10⁻¹⁸ J
Physics Decay Problem?
A neutron at rest undergoes decay, breaking up into a proton and an electron. This decay releases energy, which manifests as kinetic energy of the proton and electron. Given that the mass of a proton...
Why does energy equal mass times the speed of light squared?
What is the reasoning behind the equation that states energy is equal to mass multiplied by the speed of light squared (E=mc²)? Can you explain the significance of this relationship in the context of...