By multiplying the mass flow of a current by the specific energy of said current we obtain:
a)the specific mass of the current
b)energy per unit time
c) the speed of the current in Joules
d )the molar energy of the current
By multiplying the mass flow of a current by the specific energy of said current we...
The number of moles of a substance can be converted into molecules by ______. a). multiplying them with Avogadro's number b). dividing them with Avogadro's number c). multiplying them with molar mass d). dividing them with molar mass
20 ℃ Liquid water is flowing into a chamber with a mass flow rate of 1.5 kg/s and heated by mixing it with a superheated steam at 300 ℃. For a specified mixing temperature at 60 ℃, what is the mass flow rate of the steam we need to set and what is the mass flow rate of the 60 ℃ water we can get? Assume: • Mass flow rate ?̇ is the mass change per unit time, with the...
units
1. Recall that we write XI = x if X ~ Mr where M is a mass and we set ћ = c = 1. Find X] for the following quantities X in D spacetime dimensions (a) Voltage V. (b) Current I. (c) Resistance R. (d) TorqueT (e) Moment of inertia I. (f) The area A of a SD2 sphere (which can surround an object in D - 1 space dimensions. (g) The electric flux of an electrically charged...
2. Separate from problem #1, we transfer 5 Joules into the internal energy of the pin, heating the pin to a new, higher temperature. If the pin has a specific heat capacity of 100 Joule per gram per Kelvin (J/kg K), by how many deegrees Kelvin will the pin's temperature rise? (A) 50 K (B) 10 K (C) 5 K (D) 1 K (E) 0.01 K 3. Now let's transfer 5 Joules into sound waves. If the impact of the...
2A. How much mass-energy is there in a 130 g sandwich? 2B. If said sandwich was travelling at a speed of 0.6c, how much kinetic energy does it have? 2C. Protons in the LHC are accelerated until their mass-energy is 8TeV (8 x 10^ 12 eV). If protons have a rest mass of 938MeV/c^2 (9.38 x 10 ^8 ev/c^2), how fast are they going in terms of c? Your answer should include three digits that are not 9
RMR can help us find our total daily energy expenditure by: Multiplying our RMR by our TDEE Multiplying our RMR by an estimated activity factor (AF) Multiplying our RMR by how many kilocalories we consume Multiplying our RMR by how many hours we sleep at night, then divide that by 24 hours in a day 2.) All of the following is true of invisible fats EXCEPT: a. Majority of fat in peoples diets come from this type of fat b. ...
4) Electric current is charge flowing per unit time. If we increase the kinetic energy of the electrons in a photoelectric effects experiment, shouldn't the current increase, because the charge flows more rapidly? Why doesn't it?
If you look at the table of specific heat values for different metals, they are all so different from one another. The difference is mainly because specific heat is expressed as energy per unit mass. If specific heat were given as energy per mole, the values would be very similar. It is, in fact, this similarity of the molar specific heats of metals, which is the basis for the Law of Dulong and Petit. The law of Dulong and Petit...
In this problem we will explore the energy of a mass on a spring. (a) Write down the kinetic energy (as a function of time) of a mass m oscillating on a spring with a spring constant k according to the equation x(t) = A cos(ωt + φ). Give your answer in terms of m, ω, φ, A, and t. (b) Now write down the elastic potential energy as a function of time for the same mass. Give your answer...
A bare helium nucleus has two positive charges and a mass of 6.64 ✕ 10-27 kg. (a) Calculate its kinetic energy in joules at 1.20% of the speed of light. (b) What is this in electron volts? (c) What voltage would be needed to obtain this energy?