Answers: 1
Physics, 22.06.2019 08:50
You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?
Answers: 1
Physics, 22.06.2019 12:20
Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?
Answers: 2
Physics, 22.06.2019 16:50
Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.
Answers: 2
Physics, 22.06.2019 16:50
Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.
Answers: 3
Find the density of a substance whose voume is 5cm3 and whose mass is 25 g...
Mathematics, 03.10.2019 09:00
Mathematics, 03.10.2019 09:00
English, 03.10.2019 09:00
Chemistry, 03.10.2019 09:00
Health, 03.10.2019 09:00
Biology, 03.10.2019 09:00
English, 03.10.2019 09:00
Business, 03.10.2019 09:00
Computers and Technology, 03.10.2019 09:00
Social Studies, 03.10.2019 09:00
English, 03.10.2019 09:00
Mathematics, 03.10.2019 09:00
Social Studies, 03.10.2019 09:00
Arts, 03.10.2019 09:00
Biology, 03.10.2019 09:00
Mathematics, 03.10.2019 09:00
History, 03.10.2019 09:00