In each of the following cases identify all objects in the surroundings that exert forces on the system.(a) You hit a baseball with a bat. Choose the baseball as the system. At the instant of contact with the bat, what objects should be included in the surroundings (what objects exert forces on the ball)?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10^−2 cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . the potential difference between the anode and cathode is 260 v . an electron leaves the surface of the cathode with zero initial speed (v initial=0). find its speed vfinal when it strikes the anode.

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material