List at least five examples of minerals and their common uses.

Physics

1 answer:

juin [17]3 years ago

6 0

Answer:

Gold

mica

halite

gypsum

copper

Explanation:

Gold:it is used in dentistry

mica: its is used in putting sparkle in rock

halite:its used in seasoning food and softening water

gypsum: it is used as fertilizer and road construction

copper: it is used for jewelry and currency

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-24.28571 rad/s²

29.57239 revolutions

3.91176 seconds

52.026478 m

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$a_t$ = Tangential acceleration = -6.8 m/s²

r = Radius of wheel = 0.28

$\omega_i$ = Initial angular velocity = 95 rad/s

$\theta$ = Angle of rotation

$\omega_f$ = Final angular velocity

t = Time taken

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$\alpha=\frac{a_t}{t}\\\Rightarrow \alpha=\frac{-6.8}{0.28}\\\Rightarrow \alpha=-24.28571\ rad/s^2$

The angular acceleration is -24.28571 rad/s²

$\omega_f^2-\omega_i^2=2\alpha \theta\\\Rightarrow \theta=\frac{\omega_f^2-\omega_i^2^2}{2\alpha}\\\Rightarrow \theta=\frac{0^2-95^2}{2\times -24.28571}\\\Rightarrow \theta=185.80885\ rad=185.80885\times \frac{1}{2\pi}\\\Rightarrow \theta=29.57239\ rev$