Suppose on a nice december evening you gaze upon your favorite star. you stick your handout into the sky and point at it, then you keep your arm fixed and frozen. until 6 months later when you reach for the sky again and point at your star with your other arm. suppose now you observe the angle you have created with your arms to be 0.06o. how far is the star from the sun? [hint: assume the earth orbits in a circular motion around the sun once every 12 month, where the orbit has radius of r=149.6×106kmr=149.6×106km ]

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass