What did J. J. Thomson's cathode ray experiment show about atoms? A. Atoms are negatively charged.
B. Electrons move around the nucleus.
C. Atoms contain negatively charged particles.
D. Most of an atom's mass is concentrated in a small space.

a c d and f

just finished the assignment

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

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