Pressing (Win+L) will quickly lock a laptop
Frequency = how many waves you get per sec
Period = how long each wave takes
Period = 1/frequency
<span>Calcium - alkali earth metals is the answer</span>
Pupils dilate and constrict in order to allow an adequate amount of light to pass through the retina and vision. If there is not enough light and the pupils do not dilate, a small amount of light will pass to the retina and the vision will be damaged.
Mass.
Because mass doesn't depend on weight but weight depends on mass.