Magnetism is a type of
A. force
B. energy
C. gravity
D. electricity
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Initially, a particle is moving at 5.33 m/s at an angle of 37.9° above the horizontal. two seconds later, its velocity is 6.11 m/s at an angle of 54.2° below the horizontal. what was the particle's average acceleration during these 2.00 seconds in the x-direction (enter first) and the y-direction?

Can anybody me with this? ? (picture included.)

Hydrogen and helium are both members of?