Answer:
Explanation:
Radius of circular path of coin R = 12.5 x 10⁻²,
coefficient of static friction μs = .33
In order that the coin rotates in circular path , it requires centripetal force which is provided by friction. As speed of rotation increases , force of friction also increases to provide it required centripetal force. When the speed of rotation becomes too high so that frictional force can not compensate the increase in centripetal force then coin will start slipping or it starts moving with respect to turntable.
b ) At this point of time
centripetal force = limiting force of friction
mω² R = μs mg , m is mass of the coin , ω is angular velocity ,
ω² R = μs g
ω² x 12.5 x 10⁻², = .33 x 9.8
ω² = .33 x 9.8 / 12.5 x 10⁻²,
= 25.87
ω = 5.08 rad / s
2π / T = 5.08
T = 2π / 5.08
= 1.23 s .
Answer: Lack of melanin in the skin.
Explanation: The amount of melanin in your body is determined genetically. Some people dont produce enough melanin to protect their skin well. Eventually the UV causes the skin to burn, causing redness, swelling and pain.
PLEASE RATE 5 STARS AND VOTE AS BRAINLIEST:)
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First we need to convert everything into SI units.
The initial volume of the gas is (keeping in mind that
![1 L = 0.001 m^3](https://tex.z-dn.net/?f=1%20L%20%3D%200.001%20m%5E3)
:
![V_i = 5.0 L = 0.005 m^3](https://tex.z-dn.net/?f=V_i%20%3D%205.0%20L%20%3D%200.005%20m%5E3)
The initial pressure of the gas is (keeping in mind that
![1 atm = 1.01 \cdot 10^5 Pa](https://tex.z-dn.net/?f=1%20atm%20%3D%201.01%20%5Ccdot%2010%5E5%20Pa)
:
![p_i = 1.50 atm=1.52 \cdot 10^5 Pa](https://tex.z-dn.net/?f=p_i%20%3D%201.50%20atm%3D1.52%20%5Ccdot%2010%5E5%20Pa)
The final pressure of the gas is (keeping in mind that
![760 mmHg = 1 atm=1.01 \cdot 10^5 Pa](https://tex.z-dn.net/?f=760%20mmHg%20%3D%201%20atm%3D1.01%20%5Ccdot%2010%5E5%20Pa)
)
![p_f = 1240 mmHg = 1.65 \cdot 10^5 Pa](https://tex.z-dn.net/?f=p_f%20%3D%201240%20mmHg%20%3D%201.65%20%5Ccdot%2010%5E5%20Pa)
At constant temperature, the product between pressure and volume of the gas is constant, so we can write
![p_i V_i = p_f V_f](https://tex.z-dn.net/?f=p_i%20V_i%20%3D%20p_f%20V_f)
from which we find the final volume of the gas:
B) Irregular
Good luck on the rest :D
Answer:
![m=14kg](https://tex.z-dn.net/?f=m%3D14kg)
Explanation:
Hello.
In this case, since the force is defined in terms of the mass and acceleration by:
![F=m*a](https://tex.z-dn.net/?f=F%3Dm%2Aa)
We can easily compute the mass by solving for it:
![m=\frac{F}{a}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7BF%7D%7Ba%7D)
Whereas the force is 182 N (kg*m/s²) and the acceleration is 13 m/s², therefore, we obtain:
![m=\frac{182kg\frac{m}{s^2} }{13\frac{m}{s^2}}\\\\m=14kg](https://tex.z-dn.net/?f=m%3D%5Cfrac%7B182kg%5Cfrac%7Bm%7D%7Bs%5E2%7D%20%7D%7B13%5Cfrac%7Bm%7D%7Bs%5E2%7D%7D%5C%5C%5C%5Cm%3D14kg)
Best regards.