An isotope has a half-life of 25 days. If you start with 50 grams, how much of the substance

Physics

1 answer:

a_sh-v [17]2 years ago

4 0

Answer:

12.5

Explanation:

If the half life is 25 days then in 50 days it will half twice

50/2=25

25/2=12.5

You might be interested in

In the following reaction, which substance is the precipitate?(NH4)2SO4(aq) + Ba(NO3)2(aq) BaSO4(s) + 2NH4NO3(aq

Delvig [45]

The precipitate is the barium sulfate, or 3) BaSO4. This is because it is a solid (as seen by the (s)), unlike the other aqueous product. The fact that it is a solid means that it is insoluble in water and therefore a precipitate.

Hope this helps!

7 0

3 years ago

Read 2 more answers

A cat chases a mouse across a 1.2 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the

Drupady [299]

The cat has two directions of motions:
The horizontal motion = Dx = 2.2 m
The vertical motion = Dy = -1.3 m (negative sign indicates that the cat is falling)
a = 9.8 m/sec^2
Vy = zero (since you are not moving up)

From the laws of motion:
Dy = Vyt + 0.5ayt^2
-1.3 = 0(t) + 0.5(-9.8)t^2
t = 0.52s

Then, again using the laws of motion (but for the horizontal direction this time)
Dx = Vxt
2.2 = Vx0.52 
Vx = 2.2/0.52 
= 4.23 m/s

Therefore the cat's speed when it slid off the table is 4.23 m/s horizontally.

7 0

3 years ago

Which of the following is NOT a layer of the Sun?

Alja [10]

It depends when you look at a pichture it could possibly help.

3 0

3 years ago

Which optical devices spread light apart?

Harman [31]

$\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}$