Answers: 2
Physics, 21.06.2019 13:30
What do radio waves and microwaves have in common? both are at the side of the spectrum that has the shortest wavelengths. both are at the side of the spectrum that has the lowest radiant energy. both are at the side of the spectrum that has the lowest frequency. both are found next to visible light on the electromagnetic spectrum.
Answers: 1
Physics, 21.06.2019 21:30
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?
Answers: 3
Physics, 21.06.2019 22:20
Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage
Answers: 2
Physics, 22.06.2019 02:50
20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.
Answers: 3
Two forces whose resultant is 100newton are perpendicular to each other. If one of them makes an ang...
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Biology, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Social Studies, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
English, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01
Mathematics, 11.09.2020 09:01