What is the product of the first beta decay in this series?
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A)
AC-227
Eliminate
Ac-228
Ra-227
D)
Rn-224
Ac-228

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s. a. determine jay’s mass. b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?