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?​

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.