What enables humans to "see" light in the infrared range of the electromagnetic spectrum?

Susie ran a race. she ran 55 miles an hour, and the race took her tt hours to complete.

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force

Alex is the head photographer for the yearbook and the newspaper. she has a large staff of assistant photographers because they need to take pictures at all of the school events. she knows that some of her photographers have better cameras and can take action shots at sporting events, and that some of them are good at taking candid pictures in the hallways. she sets firm deadlines so she has enough time to look through all of the shots and choose the best ones. she gives her photographers constructive feedback to them improve their pictures. respectful enforcer warlord doormat peacemaker