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2 years ago

Radon-222 transforms into polonium-218 and an alpha particle (he-4). what else is created?

1 answer:

6 0

Hm pretty much that's all for alpha decay... But always after any alpha or beta decay, gamma photons are released because the daughter products end up in an excited state so they have to release energy through gamma decay

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Carbon and oxygen react to form carbon dioxide what are the products?

Harman [31]

Answer:

When a non-metal burns in oxygen, a non-metal oxide forms as product. Here is the word ... Coal is a form of carbon and when it burns in oxygen we can represent the reaction with the following word equation: carbon + ... Which non-metal do you think reacts with oxygen to form sulfur dioxide? See if you ... C + O2 → CO2.

Explanation:

4 0

2 years ago

Read 2 more answers

PLEASE HELP!!

klio [65]

Answer:

19.26 m/s

Explanation:

I will put a photo

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2 years ago

A child and sled with a combined mass of 54.8

Roman55 [17]

Answer:

15.02 m/s.

Explanation:

Given that the height of the hill, h= 11.5 m.

Combined mass, m= 54.8 kg

The initial velocity of the combined mass, u=0

Acceleration due to gravity, $g = 9.81 m/s^2$ .

Angle of the path the horizontal, $\theta = 36$ degree.

Let A be the initial position and B be the final position of the sled as shown in the figure.

The path is frictionless so the drag force =0

The gravitational force acting on the combined mass in the downward direction, $F= mg\cdots(i)$

The component of force acting in the direction of motion = $F\sin \theta.$

Let $a$ be the acceleration of the combined mass, m, So,

$F\sin \theta= ma$

$\Rightarrow mg \sin \theta= ma$ [ from equation (i)]

$\Rightarrow a = g \sin \theta \cdots(ii).$

Let v be the final velocity of the combined mass.

Now, by using the equation of motion,

$v^2=u^2+2as\\\\\Rightarrow v^2=0^2+2as\\\\ \Rightarrow v^2=2as\cdots(iii)$

Here, s is the displacement in the direction of motion,

So, s= AB

Now, in the right-angled triangle ABO,

$\sin\theta = OA/AB= h/AB\\\\\Rightarrow AB = h/ \sin\theta\\\\\Rightarrow s = h/ \sin\theta\cdots(iv)$

Now, from equations (ii), (iii) and (iv), we have

$v^2= 2\times g \sin \theta \times \frac {h}{\sin\theta}\\\\\Rightarrow v^2= 2gh\\\\\Rightarrow v= \sqrt{2gh}$

By using the given values, we have

$v= \sqrt{2\times 9.81\times 11.5}=\sqrt {225.63}\\\\\Rightarrow v = 15.02 m/s$

Hence, the speed of the combined mass at the bottom = 15.02 m/s.

7 0

2 years ago

A golf club exerts an average horizontal force of 1000 n on a 0.045 -kg golf ball that is initially at rest on the tee. the club

OlgaM077 [116]

The impulse (the variation of momentum of the ball) is related to the force applied by
$\Delta p = F \Delta t$
where $\Delta p$ is the variation of momentum, F is the intensity of the force and $\Delta t$ is the time of application of the force.
Using F=1000 N and $\Delta t = 1.8 ms=1.8 \cdot 10^{-3}s$ , we can find the variation of momentum:
$\Delta p = (1000 N)(1.8 \cdot 10^{-3} s)=1.8 kg m/s$

This $\Delta p$ can be rewritten as
$\Delta p = p_f - p_i = mv_f - mv_i$
where $p_f$ and $p_i$ are the final and initial momentum. But the ball is initially at rest, so the initial momentum is zero, and
$\Delta p = mv_f$
from which we find the final velocity of the ball:
$v_f = \frac{\Delta p }{m}= \frac{1.8 kg m/s}{0.045 kg}= 40 m/s$

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2 years ago

People under going physical therapy after an injury often find it helpful to perform exercise in water? Why?

BARSIC [14]

Because water puts less weight on the joints helping prevent more pain and potentially problems

Also if you could give me Brainily that would be amazing

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2 years ago