Aperson wants to lose weight by "pumping iron". the person lifts an 80 kg weight 1 meter. how many times must this weight be lifted if one pound of fat contains approximately 3500 calories. if the weight can be lifted once every two seconds, how long would this activity take? 1 cal=4184 j.

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.