A motorized wheel is spinning with a rotational velocity of 0=1.17 rad/s. At =0 s, the operator switches the wheel to a higher speed setting. The rotational velocity of the wheel at all subsequent times is given by ()=0arctan(+2)

where =1.5574 and =5.21 s−2.
At what time max is the rotational acceleration at a maximum?

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom