Starting a fire to
roast marshmallows
is an example of
energy being
converted into
energy.

A. Chemical , heat

B heat and chemical

C chemical and light

D. Heat and light

I need help ASAP 50 points!!!

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o

What was the first instrument to ever record an earthquake?