Answer: alpha decay and beta decay cause the parent nucleus to become a different element.
Explanation:
Alpha decay : It is a radioactive decay in which nucleus emits an alpha particle and turns into different atomic nucleus. During alpha decay, an atom loses 2 protons and 2 neutrons.
Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron.Thus a different element is produced.
Gamma decay : In this process, the unstable nuclei transformed into stable nuclei by releasing gamma rays along with beta or alpha decay.The same element is produced.
Answer: 9. 9 times force
8. 7000 N/C directed towards q₂
Explanation:
9.
Let the two charges be and separated by distance r. Then the force of repulsion is given as :
where, k is the Coulomb's constant.
When the magnitude of the charges is tripled: and , the new force of repulsion, force' is:
8.
The electric field is given by:
where q is the charge and r is the distance of the point from the charge where electric field is required to be found.
It is given that,
Electric field due to charge at point a is:
Electric field due to charge at point a is:
Thus, net electric field due to both charges at a is
No becuase the simplified case of constant speed, use the formula:
<span>distance = speed x time</span>
Marie:
She discovered Polonium and Radium, she was the first woman to receive a Nobel prize, and she made the first portable radio during the first World War.
Curie:
Said to be one of the founders of modern physics and formulated the Curie's law stating that M= C*B/T.