(3) The speed of light in vacuum, c, is 3 X 105 km/s and 1 kilometer = 1000 meters. How many Joules of energy are released if 2 kg of matter are converted into energy at 0.1% efficiency? First convert c to units of meters/second: c = 3 x 105 km/s x 1000 m/km = 3 x 108 m/s. Then express efficiency (eff) in decimal terms: eff = 0.001. In this type of problem, the mass/ energy equivalence equation is written as: E = (eff) mc2 Joules,

Q: An equation for potential energy states U = Mgh. If U is in kg·m^2 ·s−2, M is in kg, and g is in m…

A:

Q: The figure shows two infinite wires perpendicular to the xy-plane with identical currents I = 30 A.…

A: given,currenti=30 Ar1=1 mr2=2 m

Q: The SI unit of electrical energy is ____________ a) kilojoule (KJ) b) joules (J) c) watt (W) d)…

A: The correct answer is b.

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A: Given that, the life time of unstable atomic nucleus is in the order of 10 s. (In actual case, it is…

Q: We are going to make a simple approximation of the number of atoms in the universe. Assume all the…

A: Given that, Density of sun = 1.4 g/cm3 Radius of sun = 7.0×108 m =7.0×1010 cm Mass of the sun =…

Q: A house’s electricity use, over a one day period, is modelled by E(t) = t + sin(t) (kW), where t is…

A: Power=Work/time Energy=Work=power×time

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A: The smaller unit of distance is meter, millimeter, micrometer, nanometer, picometer, etc. The larger…

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A:

Q: A particular frost-free refrigerator uses about 720 kWh of electrical energy per year.    Express…

A:

Q: A maser is a laser-type device thatproduces electromagnetic waves with frequencies in the…

A: Given: The frequency of the wave is f = 1420405751.786 cycle/s. The clock is off by 1 s in 100000…

Q: 0.3 Suppose the average daily metabolic rate for certain types of animals can be expressed as a…

A: The average daily metabolic rate for certain types of animals can be expressed as a function of mass…

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A:

Q: Two teams (A & B) make 9 repeated measurements of the length of a 112 cm long table with the…

A: Step 1: Find which team has more precision Recall the precision refers to how close the measurement…

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A:

Q: The satellite is moved into a new orbital radius R2 from R. R2 is greater than R. Compare the…

A: we have R2>R

Q: The amount of heat needed to reduce the temperature of 1.5 kg of snow from -15 degrees Celsius to -5…

A:

Q: (1) A typical bacterium has a mass of 1 picogram (1 × 10-¹2 gram). Calculate the mass of a mole (or…

A: Mass of bacterium m= 10^-12gm.

Q: The unit hertz (abbreviated Hz) describes the number of cycles per second that occur for repeating…

A: (a) Geometric series (nthterm ) is given as,tn=arn-1where a=first term=440 Hzr=common ratio=21/12the…

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A: given that (4.2 km) × (4.0 m) × (13.24 × 10−3 mm)

Q: How to convert 2500 watts to w/h under these conditions. The 2500 watts were the measured average of…

A: Solution:   As per the above data,

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A:

Q: (d) Number (e) Number (f) Number i 63.18 MI 2.77 i 6.925 (g) Number i 1.385 (h) Number i 3.463 Units…

A:

Q: A mass of 76g is placed on the end of a 3cm vertical spring. This causes the spring to extend to…

A:

Q: New more economical water showers would add approximately 8l/min. If the user takes a shower once a…

A:

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A: Given: The frequency of electromagnetic waves is f=1420405751.786 Hz. The age of earth is t=4.6×109…

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A:

Q: A mass of 39g is placed on the end of a 4.1cm vertical spring. This causes the spring to extend to…

A:

Q: One mole of Gold (Au) atom has a mass of 197 g. We know that the density of gold is 19.30 g/cm3 in…

A:

Q: As part of an important engineering project for NASA, you've been asked to do some unit conversions.…

A:

Q: Convert the following quantities as requested (no computation required): (a) 10 cg =  ___g (grams);…

A: (a) solution- We know that  1 cg = 0.01 g So, 10 cg = 10× 0.01g = 0.1 g = 10-¹ g (a)Answer=> -1

Q: 3. Rank the following quantities in order from the largest to the smallest: (a) 22g, (b) 0.333kg,…

A: the question is that--- Rank the following quantities in order from the largest to the smallest: (a)…

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A: Gauss's law states that the electric flux going through a closed surface is directly proportional to…

Q: KE = (0.5) x 70 kg x (6.95 x 6.95)

A: We know that kinetic energy is given by  KE=1/2mv2

Q: Sarah drove her car a distance of 506.7 km, and used 50.1 L of gasoline (petrol). What is her fuel…

A:

Q: 2.3 The average annual per person energy use in Cameroon is 14.3 GJ. Assume that 75% of this energy…

A: Write the calorific value of dry wood. CVdry wood=19 GJ/tonne   Write the calorific value of…

Q: A light-year is the distance light travels in one year (at speed 2.998 x 10^8 m/s). (a) How many…

A:

Q: How many kw-hr of energy does a 40 Watt light bulb use in one hour?   B) FPL charges 10.8 cents…

A:

Q: A light-year (ly) is the distance light travels in one year (at speed of 2.998 ×× 108 m/sm/s ). An…

A: Given that:- Speed of light=2.998×10^8m/s

Q: The world's deepest swimming pool is located in Poland and is filled with pure water. A camera at…

A: Given data: - The mass of the camera is m = 215 grams. The total pressure on the camera is P = 157…

Q: Express the speed of light, 3.00 × 108 m/s, in (a) ft/ns; (b) miles/s; (c) AU/h. I need to show all…

A: The speed of light is

Q: Earth has a mass of 5.98*1024 kg.The average mass of the atoms that make up Earth is 40 u. How many…

A: Given : mass of the Earth, ME = 5.98*1024 kg            Average mass of atoms, m = 40 u

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.