(a) what is the acceleration of gravity on the surface of the moon? the mass of the moon is 7.35 x 1022 kg and its radius is 1.74 x 106 m. (b) what is the acceleration of gravity on the surface (or outer limit) of mercury? the mass of mercury is 3.30 x 1023 kg and its radius is 2.44 x 106 m

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

What is the role of lenses in microscopy?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?