The half-life for an 80-gram sample of an unknown radioactive element is 5 days. how much of the unknown radioactive element remains after 10 days have passed? A.20g
B.40g
C70g
d80g

4. 50x10= 500m/s 5. 52m/s

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.

Answer it orbits high above earth to gain clearer images of light, it magnifies images relative to the human eye, it records most of the universe as it was in the past, not as it is now;

We can infer that star y is closer but other factors must be considered including the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contain less heat.