Jestion 6 ot yet
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If the wavelength of a particular ray travelling in vacuum is known, you can determine its period because
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O a. the period is directly proportional to the wavelength of an EM wave
O b. the period is the same for every ray within the EM spectrum
O c. the period is inversely proportional to the wavelength of an EM wave
O d. wavelength and frequency are equal.
O e. the period is the square of the wavelength of an EM wave

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.