75% (about 6574 hours f $0.0054 per kWh
Q: The laptop consumed a total of 20 kW per month. This is equivalent to how many BTU/hr?
A: Given data Power (P) = 20KW
Q: 21 a 1550-kg car moving at a constant speed of (900 km/hr) Its takes (16,000W)to keep it on alevel…
A: Given data: Mass of the car = 1550 kg Speed of the car (v) = 900 km/h…
Q: Traveling with an initial speed of vo 53 km/h, a car accelerates at 3,259 km/h along a straight…
A:
Q: Convert between energy units. 2.85x10^3 J to cal
A: Understand that the joule is the SI unit of energy and Calorie is used as the unit of energy in the…
Q: B. Choose the correct answer 1. The unit of joule can be converted to which of the following? (A) Pa…
A: To choose: The correct option. Given: The one unit of joule. Explanation: The joule is the SI unit…
Q: Convert 30 µg/ft³ to kg/m³ NB: (1ft = 12 inches, 1 inch = 2.54 cm) Answ: 1.06 x 10 kg/m³
A:
Q: Convert between energy units. 534 kWh to J
A: There are basically two units for energy conversion one is Joules and other is calories For…
Q: What do you mean by conservation of mechanical energy?Write the mathematical form.
A: Step 1 Law of conservation of mechanical energy:- The total amount of mechanical energy in a closed…
Q: 23. Partway down a hill, a roller coaster car has kinetic energy of 15, 000 J. What is its potential…
A: Option c is correct.
Q: costs 8 cents per kW-hr, determine the minimum theoretical operating cost to heat the house for 24…
A:
Q: How much energy corresponds to 1 lbm?
A:
Q: A small aircraft with a weight of 700kg was able to climb 300m within two minutes. How much power…
A: Given data Mass of air craft = 700 kg Additional elevation to climb = 300 m Time required = 2 mins =…
Q: Q2/ Answer the following. 1- Arrange the following energies according to its quality and then the…
A: Given :- Arrange the following energies according to its quality and then the type(renewable or…
Q: Using unity conversion ratios, show that 1.00 lbm weighs 1.00 lbf on earth
A: →Mass of 1 lbm is subjected to standard earth gravity→ g = 32.174 ft/s2→From Newton's second lawW…
Q: Show that 1 kgf/cm2 = 14.223 psi.
A: Given Data: The given pressure is p = 1 kgf/cm2. STEP 1: 1 kgf can be expressed as, 1 cm2 can be…
Q: Convert between energy units. 231 cal to kJ
A: One calorie is defined as the amount of energy required to raise the temperature of unit gram water…
Q: what is the cost of that heat loss to the home owner for 10hours if the cost of electricity is PHP…
A: Given Time, t = 10 hours Rate, R = PHP 0.45/kWh Heat loss, Q = 2.46 kJ/s Find…
Q: If the Power Coefficient wind energy system is 25 % O a. two times of turbine power output b. four…
A: Turbine Power
Q: 6kg 403g - 3 kg 779 g =
A: We know that 1kg = 1000 grams 6 kg = 6000 grams 6kg 403 g= 6403 grams 3kg = 3000 grams 3 kg 779g=…
Q: B 1m E 2F
A: For solution refer below images.
Q: Given data m-20 kg g-10 m/s2 h-2 m Find Potential energy
A: Given data : Mass=m Acceleration due to gravity=g height=h Required : Potential energy
Q: A 200-hp engine can deliver, in SI units, an average power of ____. (1 hp = 746 W)
A:
Q: In a bike, the is converted into power. O A. kinetic energy O B. heat energy O. work energy O D.…
A:
Q: 1.5 m 1.5 m P. 180 kg
A: For solution refer below images.
Q: е. Suggest some cause for the 'losses' in Potential Energy. C.
A: Potential energy: It is the energy stored by an object due to the relative position (vertical…
Q: 2. A boiler consumes half a cubic meter of natural gas in one hour. What is the power of this boiler…
A: Calculated the power of the boiler in kW.
Q: Change 2.223 kJ/kg-K to J/g-K
A: Following is the answerfor the quetion.
Q: 3. An electric motor consumes 9.00 kJ of electrical energy in 1.00 min. If one-third of this energy…
A: Given Energy, Q = 9 kJ Time, t = 1 min = 60 sec Speed, N = 250 rpm Find Torque, T
Q: Energy Conversion Problem 1. Atypical home uses about 30 kWh of electricity per day. The electric…
A:
Q: Convert between energy units. 2.88x10^4 J to Cal
A: Given: The energy is E=2.88×104 J. The unit conversion factor to convert Joule into Calorie is, 1…
Q: A school is paying $0.09/kWh for electric power. To reduce its power bill, the school installs a…
A: Write the expression for the power generated by the wind turbine.
Q: uces 10 kW indicated power & mechanical efficiency is 80%. The friction power is
A: given:indicated power ip=10kwηmech=80%
Q: Define Potential energy.
A: Let's say a man of mass 'M' is at a height 'H' from the ground level and he's stationary. So, the…
Q: A hoisting engine lifts a 450 kg bucket containing 5,5 m3 broken ore with a density of 1,6 t/m3 a…
A: Bucket mass = 450 kg V = 5.5 m3 ore with a density of 1.6 t/m3 height of 1 500 m in three minutes.…
Q: How much heat does it take to melt 5000g of water? By using this formula Hf = 333 J/g; Hv =…
A: latent heat is the heat given or extracted from the substance only to change its phase at constant…
Q: 10° m = 6 Kg A 40° 2.10 m B Datum
A: givenmass of the ball m=6kgTotal length of string O-C L=2.10m
Q: 4. A business uses two 3 kW fires for an average of 20 hours each per week, and six 150 W lights for…
A:
Q: Convert between energy units. 567 Cal to J
A: The energy is E=567 cal. The unit conversion factor to convert Calories into Joule is, 1 cal=4.184…
Q: equivalent of In (2 +3 j)
A: To determine the equivalent of ln( 2+3 j)
Q: Convert between energy units. 132x10^4 kJ to kcal
A: Given: The energy is E=132×104 kJ. The unit conversion factor to convert Kilo Joule into Kilo…
Q: Convert between energy units. 4.99x10^3 kJ to kWh
A: Kilojoule (kJ) is the standard unit of energy. It is also the unit of work. The different type of…
Q: By how much is the magnitude of 3B greater than that of A? A = 5i - 6j B = 3i+2j
A: GivenB=3i+2jA=5i-6j
Q: Q1: what is the required force to move a car (1300 kg) from rest to 80 m (with a 20 m/sec)? *
A: Given: maas of the car, m=1300 kg Distance travel, d=80 m initial velocity, u=0 m/s final velocity.…
Q: .If 10 lb of water is evaporated at atmospheric pressure until the volme of 288.5 ft is occupied,…
A:
Q: A washing machine has a power rating of 1360 W. How much energy does this appliance consume in one…
A:
Q: B -1.2 m/s2 35 m A 36 km/h
A: hete take Cartesian co-ordinate system NORTH =+j, SOUTH = -j, EAST= +i , WEST = -i. for above…
Q: . A stream flowing at 141 ft3/s and have a vertical drop of 16 ft will be used to generate…
A: ⇒given;⇒stream flow (Q)=141ft3/s =3.99m3/s⇒vertical drop(h)=16ft…
Q: A 2.5 N weight has a kinetic energy 1.75 J. Determine its velocity in kph.
A:
Step by step
Solved in 2 steps
- 3.9 The heat transfer coefficients for the flow of 26.6°C air over a sphere of 1.25 cm in diameter are measured by observing the temperature-time history of a copper ball the same dimension. The temperature of the copper ball was measured by two thermocouples, one located in the center and the other near the surface. The two thermocouples registered, within the accuracy of the recording instruments, the same temperature at any given instant. In one test run, the initial temperature of the ball was 66°C, and the temperature decreased by 7°C in 1.15 min. Calculate the heat transfer coefficient for this case.In the United States, energy for household heating is generally sold using English units, e.g., therm, gal, and cord. A house in Wisconsin uses 1200 therms of thermal energy during the heating season. Calculate the cost of fuel if the furnace uses (a) natural gas with an efficiency of 70%; (b) No. 2 fuel oil, efficiency 65%; (c) kerosene, efficiency 99.9% (unvented); and (d) wood with l5% moisture with an efficiency of 50%. Use the data in Tables 2.2, 2.7, and 2.13. The efficiencies are based on the HHV. Assume the cost of natural gas is $8/MBtu, the cost of No. 2 fuel oil is $3/gal, the cost of kerosene is $3.50/gal, and the cost of wood is $100/cord. Assume the bulk density of cord wood is 30 lbm/ft3 .1. Residual oil, with a heating value of 18,480 BTU/bm, is used as a fuel in a power plant which produces 947,870 BTU/s of electricity. The overall efficiency of the power plant is 52 Determine the: a. Heat input, in BTUs b. Daily fuel consumption, in lbm C. Dimensions of the cylindrical storage (assuming length is equal to the diameter), in ft. d. Heat rejected the environment, in BTU/s. The density of the oil is 62 ID/ft.
- In the United States, electricity is sold using the SI units of kilowatt (kW) or megawatt (MW), and fuel for power generation stations is generally purchased using English units, e.g., British thermal unit (Btu), gallon (gal), and ton. An industrial power plant has an average annual load of 100 MW (electrical). If the overall thermal efficiency is 33% (based on HHV), what is the annual cost of fuel if the plant is fired with (a) natural gas, (b) No. 2 fuel oil, and (c) bituminous coal? Use the data from Tables 2.2, 2.7, and 2.13. Assume the cost of natural gas is $5/million Btu, the cost of No. 2 fuel oil is $3/gal, and the cost of bituminous coal is $60/ton (1 ton = 2000 lbm)Residual oil, with a heating value of 18,480 BTU/lbm, is used as a fuel in a power plant which produces 947,870 BTU/s of electricity. The overall efficiency of the power plant is 52%. Determine the: a. Heat input, in BTU/s b. Daily fuel consumption, in lbm c. Dimensions of the cylindrical storage (assuming length is equal to the diameter), in ft. d. Heat rejected to the environment, in BTU/s. The density of the oil is 62 lbm/ft3Over the ocean surface, the Bowen ratio is estimated to be about 0.2. Estimate the sensible heat and latent heat fluxes to the atmosphere, as well as the rate of evaporation, in millimeters per day, from the ocean surface, when the net radiation received just above the surface is 800W per m^2 , the heat flux to the water below 55 m is negligible, the rate of warming of the 55 m deep oceanic mixed layer is 0.12 deg. Celsius per day, and the sea surface temperature is 27deg. Celsius.
- Water enters a boiler at 20 degrees Celsius [°C]. The boiler operates for 5 minutes [min] to heat 25 gallons [gal] of water. The boiler requires an input power of 15.5 kilowatts [kW] and is 85% efficient. The specific heat capacity of water is 4.18 kilojoules per kilogram kelvin [kJ /(kg K)]. What is the temperature of the water in degrees Celsius [°C] as it exits the boiler?Suppose we got the following data during a test of a 2- stroke engine in which gas is usedas a fuel:Diameter of the piston = 149 mmStroke length = 179 mmClearance volume = 0.88 literrpm of the engine = 302Indicated mean effective pressure = 6.0 barGas consumption = 6.0 m3/hCalorific value of the gas (fuel) = 16990 kJ/m3Make a clear sketch the geometry of this engine using the data and determine thefollowing:i. Indicated power developed by the engine in watt.ii. Air Standard Efficiencyiii. Indicated thermal efficiency of the engine.According to the U.S. Geological survey, the volume of water in oceans, seas, and bays is 1.41 ✕ 1018 m3. The average concentration of naturally occurring uranium in seawater is 3.15 ✕ 10−6 kg/m3. If 0.670% of naturally occurring uranium is the fissionable isotope U-235 and each fission reaction yields 200 MeV, estimate the amount of time the uranium in the seawater on the planet could meet the planet's energy needs at an average usage of 1.94 ✕ 1013 J/s.