During which type of radioactive decay is the mass number of a nucleus reduced by four?
O A. Beta decay (electron)
B. Alpha decay
C. Beta decay (positron)
D. Gamma decay

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

First to answer will be the brainliest i need the answer asap