Answer:
the activity of thallium is 1.54 kBq .
Explanation:
given,
half life = 3.7 years
R₀ = 10 kBq
time = 10 years
R = 10 × (0.153667)
R = 1.5367 ≈ 1.54 kBq
hence, the activity of thallium is 1.54 kBq .
Answer:
continual drift
Explanation:
it exsplain why the tectonic plates move
Answer:
The fourth planet from the sun is Mars. There are 8 planets in our solar system. Its a source of debate of whether or not Pluto is a planet so there is 8 planets and not 9.
Explanation:
Answer:
The ground exerts an equal force on the golf ball
Explanation:
Third's Newton Law states that:
"When an object A exerts a force on an object B, then object B exerts an equal and opposite force on object A".
In this problem, object A is the golf ball while object B is the ground, so we can say that:
- the golf ball exerts a force on the ground
- the ground exerts an equal and opposite force on the golf ball