The star Betelgeuse is 325 light-years away. If it were to explode in a supernova tonight, would we know? Explain your answer

What is the final velocity of the initial velocity of 25 and -50?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.