B. They came up with the term “radioactivity.”
C. They conducted experiments with uranium-containing minerals and pure uranium.
E. They discovered two new radioactive elements
Do you speak a little English cuz I can’t help you if a can’t understand you
They do not react with or chemically bond to each other.
Answer:
The wheel has turned θ= 4.84 rad when its angular speed is ωf= 2.1 rad/s
Explanation:
ωi= 3.4 rad/s
ωf= 2.1 rad/s
α= - 0.736 rad/s²
ωf= ωi - α*t
(ωf-ωi)/α=t
t= 1.76 s
θ= ωi * t - α * t²/2
θ= 4.84 rad
C. Use Coulomb's law F=kq1q2/r^2, where q1 and q2 are the two charges, and r is the distance between the two. Plug in q1=0.0072 C, q2=-0.0060 C, r=0.0040 m, k is the constant 9*10^9 N, F=-2.4*10^10 N, so the answer is C.