You have been abducted by aliens and find yourself on a strange planet. fortunately, you have a meter stick with you. you observe that, if the stick oscillates around one end as a physical pendulum, it has a period of 0.85 s. what is the acceleration of gravity on this planet? a 9.8 m/s2 b cannot be calculated without knowing the mass of the stickc 36 m/s2 d 18 m/s2 e 27 m/s2

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Will give brainliest! which statement best describes the difference between strong nuclear forces and weak nuclear forces? weak nuclear forces are involved when certain types of atoms break down. strong nuclear forces are responsible for holding atoms' nucleus together. weak nuclear forces hold bonds between atoms together. strong nuclear forces hold together the nucleus of an atom. strong nuclear bonds prevent atoms from falling apart. weak nuclear bonds prevent compounds from falling apart. strong nuclear forces are involved in breaking electrons from their shells. weak nuclear forces hold protons in the nucleus.

Explain why electric current cannot exist if a current doesn't have a voltage source.