Calculate the force of earth’s gravity on a spacecraft 2.00 earth radii above the earth’s surface (that would be 3.00 earth radii from the center of earth) if its mass is 1850 kg.
express your answer to three significant figures and include the appropriate units.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Which terms describe the purpose of antennas on devices that use radio waves? transmit and receivemodify and amplifyamplify and receivemodify and transmit

How is the gravitational force related to the distance between two objects?