An electrostatic force of 20 N is exerted on a charge of 8 x 10^-2 Coulomb at point P in an electric field. The magnitude of the electric field intensity at P is:

Which statement best explains why an object weight less on mercury than it does on earth

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.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.