which of the following have dimensions of energy: force, work, mass, heat, pressure, pressure times volume, enthalpy, change in enthalpy, internal energy, force times length
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- Our Sun shines bright with a luminosity of 3.828 x 1026 Watt. Her energy is responsible for manyprocesses and the habitable temperatures on the Earth that make our life possible.(a) Calculate the amount of energy arriving on the Earth in a single day.(b) To how many litres of heating oil (energy density: 37.3 x 106J/litre) is this equivalent?(c) The Earth reflects 30% of this energy: Determine the temperature on Earth’s surface.(d) What other factors should be considered to get an even more precise temperature estimate?Our Sun shines bright with a luminosity of 3.828 x 1026 Watt. Her energy is responsible for manyprocesses and the habitable temperatures on the Earth that make our life possible.(a) Calculate the amount of energy arriving on the Earth in a single day.(b) To how many litres of heating oil (energy density: 37.3 x 106J/litre) is this equivalent?(c) The Earth reflects 30% of this energy: Determine the temperature on Earth’s surface.(d) What other factors should be considered to get an even more precise temperature estimate?Note: The Earth’s radius is 6370 km; the Sun’s radius is 696 x 103 km; 1 AU is 1.495 x 108 km.Our Sun shines bright with a luminosity of 3.828 x 10^26 Watt. Her energy is responsible for many processes and the habitable temperatures on the Earth that make our life possible. (a) Calculate the amount of energy arriving on the Earth in a single day. (b) To how many litres of heating oil (energy density: 37.3 x 10^6 J/litre) is this equivalent? (c) The Earth reflects 30% of this energy: Determine the temperature on Earth’s surface. (d) What other factors should be considered to get an even more precise temperature estimate? Note: The Earth’s radius is 6370 km; the Sun’s radius is 696 x 10^3 km; 1 AU is 1.495 x 10^8 km.
- Growth of yeast cells In a controlled laboratory experiment, yeast cells are grown in an automated cell culture system that counts the number P of cells present at hourly intervals. The num- ber after t hours is shown in the accompanying figure. 250 200 150 100 50 0 1 2 3 4 5 6 7 a. Explain what is meant by the derivative P'(5). What are its units? b. Which is larger, P'(2) or P'(3)? Give a reason for your answer. c. The quadratic curve capturing the trend of the data points (see Section 1.4) is given by P(t) = 6.10r2 – 9.28t + 16.43. Find the instantaneous rate of growth when t = 5 hours.mgh = 1 mv ₁ ² 2 Duph FAST 2 m = 1.00 kg 9 = 9.80 m/s² V₁ = 11 m/s ² 2 08.P Solve for hieght (h) MUN TIE215.4 K/s 20 ۱۲:۵۲ ص Quiz 1 Job.pdf > 01: If a car is traveling at (80 km/h), determine its speed in miles per hour and foots per second. 80 km/h = {(80) (1000) / (0.3048)} / (5280) = 49.71 mi/h 49.71 mi/h = (49.71) (5280) / (3600) = 72.91 ft/s O 2: Determine the magnitude of the force (F) so that the resultant (FR) of the three forces is as 30 400 N small as possible. What is the minimum magnitude of (FR)? 500 N FR ΣF FRx = E Fx = F1x + F2x + F3x = 500 – F sin 30°– 400 sin 30° = (300 – 0.5F) N FRy = E Fy = Fıy + F2y + F3y = 400 cos 30°- F cos 30° +0= (346.4 – 0.866 F) N FR? = ( FRx)? + ( FRy )? = ( 300 – 0.5F )? + ( 346.4 – 0.866 F )? To find the minimum, we need to take the derivative of the magnitude and set it equal to zero. Take the derivative with respect to (F) so : dFR = 2 (300 – 0.5F) (- 0.5) + 2 (346.4 – 0.866 F) (- 0.866) = 0 2FR 2 (- 150 + 0.25 F + 0.75 F – 300) = 0 F= 450 N The magnitude of the resultant force is: |FR| = ( 300 – 0.5(450) ) ² + (346.4 – 0.866 (450) )² = (75…
- The number N of atoms in a particular state is called the population of that state. This number depends on the energy of that state and the temperature. In thermal equilibrium,the population of atoms in a state of energy En is given by a Boltzmann distribution expression N = Nge-(En-Eg)/kBTwhere Ng is the population of the ground state of energy Eg , kB is Boltzmann’s constant, and T is the absolute temperature. For simplicity, assume each energy level has only one quantum state associated with it. (a) Before the power is switched on, the neon atoms in a laser are in thermal equilibrium at 27.0°C. Find the equilibrium ratio of the populationsof the states E4* and E3 shown for the red transition in the figure. Lasers operate by a clever artificial production of a “population inversion” between the upper and lower atomic energy states involved in the lasing transition. This term means that more atoms are in the upper excitedstate than in the lower one.…A runner can burn as many as 3,000 calories while running a marathon. Estimate the change in the mass of the runner due to this energy loss. Neglect other methods of mass loss. [1 cal = 4184 J]The average life expectancy in Japan is 81 years. What is this time in SI units?
- For (b), why do we divide the (100Wx8h) by (103Wh)? I get that we need to cancel out the Wh, but why do we divide by 103 specifically?The molar mass M of a chemical element is its atomic mass expressed in g/molor equivalently in kg/kmol.Chapter 5, Section 5.8, Question 32 Determine the length of a rectangular trench you can dig with the energy gained from eating one Milky Way bar (270 cal). Assume that you convert the energy gained from the food with 5% efficiency and that the trench is 7 meters wide and 1 meter deep. Use the fact that the density of soil is 1000 kg/m³ and the acceleration due to gravity is 9.81 m/s². Round your answer to two decimal places. The length of the trench is the tolerance is +/- 2% Click if you would like to Show Work for this question: Open Show Work LINK TO TEXT meters.