Astudent wants to know how many students send text messages during lunch at his school. the best way for him to gather this information would be to a. text his friends during lunch and ask them if they have been texting. b. pass out a survey to every student in the school with questions about text messaging. c. try to watch every table in the cafeteria and make a note when he sees someone's cell phone. d. randomly pick tables in the cafeteria and ask how many people have sent text messages during lunch.

Ogle–2013–blg–0723 is an exoplanet that is similar to earth in size and proximity to its star. this exoplanet has mass m=4.18×1024kg and radius r=5.66×106m. an astronaut whose weight on earth is w=735n lands on the planet. a. calculate m, the mass of the astronaut. b. calculate gp? , the acceleration due to gravity on the surface of ogle–2013–blg–0723. c. calculate wp? , the weight of the astronaut on the surface of ogle–2013–blg–0723. d. calculate v, the minimum velocity required to put an object into orbit above ogle–2013–blg–0723. e. calculate t, the time required to complete an orbit around ogle–2013–blg–0723.

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?