The gravitational force between two objects (mass1 = 10kg, mass2 = 6kg) is measured when the objects are 12 centimeters apart. if the distance between them is increased to 36 centimeters, how does the new gravitational attraction compare to the first one that was measured? a. the new gravitational force is 3 times larger than the old one b. the new gravitational force is 9 times larger than the old one c. the new gravitational force is 3 times smaller than the old one d. the new gravitational force is 9 times smaller than the old one

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?