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3 years ago

What is the compound name of SrI2

Physics

2 answers:

Hunter-Best [27]3 years ago

7 0

Answer:

Strontium iodide

Explanation:

attashe74 [19]3 years ago

3 0

It can be Strontium Iodide

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In 1932 Albert Dremel of Racine, Wisconsin, created his rotary tool that has come to be known as a dremel.

kramer

Answer:

3054.32618 rad/s²

-431.1989 rad/s²

29080

Explanation:

Converting angular speed to rad/s

$\omega=35000\times \frac{2\pi}{60}=3665.19142\ rad/s$

$\omega_f=\omega_i+\alpha t\\\Rightarrow \alpha=\frac{\omega_f-\omega_i}{t}\\\Rightarrow \alpha=\frac{3665.19142-0}{1.2}\\\Rightarrow a=3054.32618\ rad/s^2$

The average acceleration while speeding up is 3054.32618 rad/s²

The number of turns in the 1.2 seconds

$\theta=\omega_it+\frac{1}{2}\alpha t^2\\\Rightarrow \theta=0\times t+\frac{1}{2}\times 3054.32618\times 1.2^2\\\Rightarrow \theta=2199.11484\ rad=\frac{2199.11484}{2\pi}=349.99\ rotations$

The number of rotations in the 1.2 seconds is 349.99

Number of rotations in the 45 seconds

$\frac{35000}{60}\times 45=26250\ rotations$

$\omega_f=\omega_i+\alpha t\\\Rightarrow \alpha=\frac{\omega_f-\omega_i}{t}\\\Rightarrow \alpha=\frac{0-3665.19142}{8.5}\\\Rightarrow a=-431.1989\ rad/s^2$

Average angular acceleration while slowing down -431.1989 rad/s²

$\omega_f^2-\omega_i^2=2\alpha \theta\\\Rightarrow \theta=\frac{\omega_f^2-\omega_i^2^2}{2\alpha}\\\Rightarrow \theta=\frac{0^2-3665.19142^2}{2\times -431.1989}\\\Rightarrow \theta=15577.0668\ rad=\frac{15577.0668}{2\pi}\\ =2479.16718\ rotations$

Number of rotations while slowing down is 2479.16718

Total number of rotations is 349.99+26250+2479.16718 = 29079.15718 = 29080

3 0

3 years ago

4. Solid ‘X’ turns into a liquid at 80 0C and into a gas at 140 0C. Describe the changes in the

Paladinen [302]

Answer:

Explanation:

The melting point of the solid is 80°C

Vapor point of the liquid is 140°C

What happens to particles of X when heated from 70°C to 85°C?

Firstly, there would be a phase change from solid to liquid.
Below the melting point, a substance will exist as a solid.
With increase in thermal energy inputted by heat, as the temperature climbs above the melting point, it changes to the liquid.
When the solid begins to heat up, the particles of X starts vibrating about their fixed point.
At they melting point, they break lose and flow to form a liquid.
The particles will have more kinetic energy.

5 0

3 years ago

How can astronomers infer wich elements are found in a star

Alchen [17]

By previous elements found in other stars, accurate guesses and lots of studying

5 0

3 years ago

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The half life of uranium-235 is 4. 5 billion years. If 0. 5 half-lives have elapsed, how many years have gone by?

igor_vitrenko [27]

Answer:

2.25 billion years