Select the correct answer from each drop-down menu. The chemical formula for sulfuric acid is H2SO4
In 2H2SO4, the number of hydrogen atoms is
✓, the number of sulfur atoms is
and the number of oxygen atoms is
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What are the phases shown in a and d called?

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.

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1