As we’ve seen, the sun’s energy comes from fusion reactions that combine four hydrogen atoms to produce a single helium atom. Even in the sun’s core, where these reactions proceed most rapidly, the reaction rate is very slow, with only about 6.7 * 1013 reactions per second occurring in 1 cubic meter ofthe core. How much power is produced by these fusion reactions per cubic meter? Compare this number with the 300 W/m3 metabolic power produced by a resting reptile.

Q: A pumped water storage plant has a head of 600 m and volume 5 x 10° m². How much potential energy is…

A: Height of Storage tank equal to 600 metre

Q: [kW] #3. At midday, solar energy strikes the earth with an intensity of about 1 . What is m² the…

A: Given data The intensity of solar energy is I=1 kW/m2 The energy collected is E=150 MJ The time is…

Q: How much work is done in blowing up a balloon from zero volume to a volume of 6.4 L, assuming that p…

A:

Q: How much energy would you consume daily if you kept a lightbulb of 20 watts on all day long?

A: A lightbulb is rated as 20 Watt which is indicating the power of the bulb.  P = E/t  Power is…

Q: A truck has four times the mass of a car and is moving with twice the speed of the car. If Kt and Kc…

A: Let mass of the car is m and speed v. Then the kinetic energy of the car is, Kc=12mv2.  Given, mass…

Q: A hot water heater in a residential home runs for an average of 2.2 hours per day with a heat energy…

A:

Q: A truck has four times the mass of a car and is moving with twice the speed of the car. If Kt and Kc…

A: Given data:   Mass of truck (mt) = 4mc Speed of truck (vt) = 2vc Required: Relationship between…

Q: If you use a 1000-watt microwave oven for 20 seconds, how much work does it do?

A:

Q: Determine the kinetic energy in joules, of a 2 gram riffle bullet traveling at 1640 ft/sec.

A: Given :  Weight of bullet= m =2 gram                          we know that 1kg=1000 grams…

Q: At typical nuclear power plants, refueling occurs every 17 months. Assuming that a plant has…

A: the efficiency of the power plant is 25% or 0.25.the energy required to produce the projected energy…

Q: A mini fan being displayed on streets is supplied with 15 W of electricity and can release

A:

Q: Calculate the kinetic energy in joules of a 76 kg traveling at 6.28 m/s.

A: Given data :                       Mass  =  m                       Velocity  =  V          To find…

Q: What is the efficiency of a subject on a treadmill who puts out work at the rate of 100 W while…

A: Given ,Output power = 100 WInput Power = 700 W (table 7.5 intext book)

Q: While running, a person dissipates about 0.60 J ofmechanical energy per step per kilogram of body…

A:

Q: If you had two shoes, an ordinary shoe and an "antishoe" made of antiparticles, and you annihilated…

A: Consider that US population at this moment is 328.2 million. If each of them has a weight of 600N,…

Q: Two railroad cars, each of mass 5819kg and traveling 108km/h in opposite directions, collide head-on…

A: Mass of each car, m = M = 5819 kg Velocity, v = V = 108 km/h = 108×5/18 m/s = 30 m/s Thermal energy,…

Q: A man spends 2.4 kJ energy in displacing a body by 48 m in the direction in which he applies force…

A: Given, Work done by man, W = 2.4 kJ distance moved, d = 48 m time, t = 1.5 s

Q: A 350-kg cart of a roller coaster is on top of the 80-m high track. What is the cart's GPE and KE at…

A:

Q: Water flows over hulugan falls, which is 70 high, at an average rate of 2.3 x 105 kg/s. If half the…

A:

Q: Estimate the energy density (MJ/m3) of a pumped hydro store  that is 100 m above its power station.…

A:

Q: Why do we not use brakes with more than 80% efficiency in automobiles? What should be the minimum…

A: we do not use brakes with more than 80% efficiency in automobiles

Q: A typical person begins to lose consciousness if subjected to accelerations greater than about 5g…

A:

Q: A 3.5 kg rock is at the top of a 37 m cliff. How much energy does the rock have? Your answer: O 130J…

A:

Q: A clothes dryer uses 3000 W and is run fro 1 hour. If the total useful energy to dry the clothes is…

A: Given: Power of the dryer P= 3000 W  time to use dryer = 1 hour  Total useful energy to dry the…

Q: Name the physical quantity which is measured in (a) kWh (b) kW (c) Wh.

A: Part akWh is commercial unit of energy.Part bkW is the converted unit of power. Part cWh is the…

Q: 10 22. During a circus performance, John Tailor was fired from a compressed-air cannon whose barrel…

A: Apply the work-energy theorem. Here, F is the average force, d is the length of the barrel, m is…

Q: What amount of work that need to be done by an external force on a particle on a frictionless,…

A: Given:work that need to be done by an external force on a particle on a frictionlesshorizontal…

Q: A man spends 3.2 kJ energy in displacing a body by 16 m in the direction in which he applies force…

A:

Q: For the given figure, the weight of the 9-ft bar is 6 lb. If F = 5.14, the reaction exerted by the…

A: Force produces torque. This torque bring about rotation. Force may be balanced but torque may be…

Q: What is the work that a 45 W light bulb can do in five minutes? O 390 kJ O 13.5 kJ O 216 kJ O 160 kJ

A:

Q: In one of the videos I said that a typical American household uses energy at a rate of about 10,000…

A: Energy=10000joules

Q: You plant o eat 9.1kcal of hot fudge sundae and then run up several flights of stairs to work off…

A: Given that, Amount planted, E = 9.1 kcal Mass, m = 38 kg We need to find the height climbed by the…

Q: The metabolic power for typing is 150 W for bob. For how long would bob have to type to use all the…

A: Power = Energy / time Time = Energy / power Energy = 5660 kJ = 5660000 J Power = 150 W Time =…

Q: If a typical city consumes electrical energy at a rate of 2.0 GW (that's 2 billion joules per…

A: Given data The power is given as P = 2 GW. The time duration is given as t = 14 weeks. The speed of…

Q: as 250 kilotons. That is a staggering explosion, but the asteroid impact that wiped out the…

A: Dear student,  As per guidelines we are required to author first three questions.  Thanking you!…

Q: Suppose a battery operates a 2.25 W electric clock for 19.5 months. 1. What is the available energy…

A: Suppose a battery operates a 2.25 W electric clock for 19.5 months. 1. What is the available energy…

Q: Hydroelectricity is generated by storing water behind a dam, and then letting some of it run through…

A: depth, h = 100 m mass, m = 10,000 kg  density, d =  1000 kg/m3  speed, v = 2 m/s

Q: How long will the 4-kW rice cooker run on 3.6x10^6 J of energy?

A: Power×time=Energy≡4×103W×time=3.6×106J≡time=3.6×106J4×103=900s900s=900s60=15minutes

Q: you are standing 2.5 m from a 150-W lightbulb. If the pupil of your eye is a circle 5.0 mm diameter,…

A:

Q: A 400 kg satellite is in a circular orbit at an altitude of 425 km above the Earth's surface.…

A:

Q: An aluminum rod is 30cm long at 33°C and has a mass of 330g. If 13,000 J of energy is added to the…

A:

Q: Your brain consumes about 22 W of power,and avocados have been shown to promote brain health. If…

A: Given data: Power consumed by the brain is, P = 22 W Each avocado contains the energy of, E = 310…

Q: Should You Walk or Run? It is 5.0 km from your home to the physics lab. As part of your physical…

A: Firstly time will be calculated to reach the physics lab in both cases. Case 1. By running at 10…

Q: Two railroad cars, each of mass 7495kg and traveling 82.8km/h opposite directions, collide head-on…

A:

Q: Compute the work done against gravity by a pump that discharges 600 L of fuel oil into a tank 20 m…

A:

Q: A particular car does work at the rate of about 7.0 k J/swhen traveling at a steady 21.8 m/s  along…

A: Given:The rate of doing work is W=7 kJ/s  The velocity is v=21.8 m/s The distance d=17 km the volume…

Q: A typical desktop personal computer uses around 100 W of power when carrying out intensive…

A: Given : P = 100 W t = 90 minutes = (90)(60) = 5400 seconds

Ideal Gas Law

Ideal gas law states that the product of pressure and volume of a gas directly varies with the product of the number of moles, the universal gas constant, and the temperature of the gas.