Answer questions on electromagnetic spectrum
Activity 1
Explain what is meant by electromagne...
Physics, 19.08.2021 14:00, grumpygirl0720
Answer questions on electromagnetic spectrum
Activity 1
Explain what is meant by electromagnetic spectrum.
2 Arrange ultraviolet radiation, radio waves, X-rays and visible light in
order of increasing frequency.
3. Arrange infrared radiation, gamma rays, microwaves and visible light in
order of increasing wavelength.
4
Calculate the:
41 frequency of an X-ray with a wavelength of 1 nm
42 wavelength of a radio wave with a frequency of 100 MHz.
5 Sunlight and welding arcs are sources of ultraviolet that can affect the
skin and eyes.
5.1 Why does ultraviolet radiation cause harm?
5.2 Suggest ways of protecting yourself against harmful radiation.
6 Why does the operator of an X-ray machine stand where she cannot
receive any radiation?
Answers: 3
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What is the angular momentum of the bar about the axle?
Answers: 3
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In science and physics what is the standard unit of measure for speed?
Answers: 1
Physics, 23.06.2019 11:00, tatiiiee
Abox that has self-contained cable clamps holds two light switches. a two-wire no. 12 cable with ground feeds the box, and a pair of two-wire no. 12 cables (four conductors) with ground wires leaves the box to feed the light fixtures. the second switch is fed by a no. 12 jumper wire from the first switch. which one of the following box combinations would furnish the minimum allowable volume? a. two 3-inch × 2-inch × 21⁄2-inch gangable device boxes b. two 3-inch × 2-inch × 11⁄2-inch gangable device boxes c. two 3-inch × 2-inch × 23⁄4-inch gangable device boxes d. two 3-inch × 2-inch × 21⁄4-inch gangable device boxes
Answers: 2
Physics, 23.06.2019 19:00, Gearyjames8
This is the rate of acceleration of any object falling under the sole influence of gravity.
Answers: 1
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