The gravitational force f exerted by the earth on an object having a mass of 100 kg is given by the equation

f =

4,000,000

d2

where d is the distance (in km) of the object from the center of the earth, and the force f is measured in newtons (n). for what distances will the gravitational force exerted by the earth on this object be between 0.0004 n and 0.01 n?

Along, straight wire with 3.0 a current flowing through it produces magnetic field strength 1.0 t at its surface. if the wire has a radius r, where within the wire is the field strength equal to 36.0% of the field strength at the surface of the wire? assume that the current density is uniform throughout the wire

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

What are two different ways you could find the value of a? explain these methods.