Ajeweler wants to melt a ring. assume the ring is pure silver and has a mass of 33 grams and the initial temperature of the ring is 58 degrees. how much energy is required to melt the ring? (use the attached table for needed constants)
2,913.9 j
3,939.87 j
9,767.67 j
6,853.77 j

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.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot