The big bang theory allows scientists to extraplolate back in time and conclude thatthe universe __. (Select all that apply) A. consisted primarily of carbon and oxygen in the past
B. emerged from a very tiny region and expanded
C. was hotter and denser in the past
D. consisted of once star with eight orbiting planets
E. consisted primarily of iron and nickel in the past
F. wad cooler and less dense in the past

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The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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.

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?