Ametallic sheet has a large number of slits, 5.0 mm wide and 20 cm apart, and is used as a diffraction grating for microwaves. a wide parallel beam of microwaves is incident normally on the sheet. what is the smallest microwave frequency for which only the central maximum occurs?
Answers: 1
Physics, 21.06.2019 21:30, krystalhurst97
Astudent looks at ocean waves coming into the beach. an ocean wave with more energy will a) have a greater height. b) have a greater period. c) travel toward the beach faster. d) strike the beach with greater frequency.
Answers: 1
Physics, 22.06.2019 10:30, zoebtharpe
An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
Answers: 2
Physics, 22.06.2019 13:30, livingfamyboys35
The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.
Answers: 2
Physics, 22.06.2019 14:30, trevorhenyan51
Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2
Answers: 1
Ametallic sheet has a large number of slits, 5.0 mm wide and 20 cm apart, and is used as a diffracti...
History, 07.11.2020 09:40
Mathematics, 07.11.2020 09:40
Mathematics, 07.11.2020 09:40
Spanish, 07.11.2020 09:40
History, 07.11.2020 09:40
Mathematics, 07.11.2020 09:40