Hot coals of wood? Wood is not coals. So they can't burn their feet, there are no hot coals, just wood.
Answer:
a) ![(x_2,y_2)=(-45.6,58.8)](https://tex.z-dn.net/?f=%28x_2%2Cy_2%29%3D%28-45.6%2C58.8%29)
b) ![s=74.4097\ m](https://tex.z-dn.net/?f=s%3D74.4097%5C%20m)
Explanation:
Given:
- x-component of avg. velocity,
![v_x=-3.8\ m.s^{-1}](https://tex.z-dn.net/?f=v_x%3D-3.8%5C%20m.s%5E%7B-1%7D)
- x-component of avg. velocity,
![v_y=4.9\ m.s^{-1}](https://tex.z-dn.net/?f=v_y%3D4.9%5C%20m.s%5E%7B-1%7D)
- initial position of rhino,
![(x_1,y_1)=(0,0)](https://tex.z-dn.net/?f=%28x_1%2Cy_1%29%3D%280%2C0%29)
- initial time,
![t_1=0\ s](https://tex.z-dn.net/?f=t_1%3D0%5C%20s)
- final time,
![t_2=12\ s](https://tex.z-dn.net/?f=t_2%3D12%5C%20s)
a)
As we know that average velocity is total displacement per unit time.
Position of x-coordinate of rhino:
![v_x=\frac{x_2}{t_2}](https://tex.z-dn.net/?f=v_x%3D%5Cfrac%7Bx_2%7D%7Bt_2%7D)
![-3.8=\frac{x_2}{12}](https://tex.z-dn.net/?f=-3.8%3D%5Cfrac%7Bx_2%7D%7B12%7D)
![x_2=-45.6\ m](https://tex.z-dn.net/?f=x_2%3D-45.6%5C%20m)
Position of y-coordinate of rhino:
![v_y=\frac{y_2}{t_2}](https://tex.z-dn.net/?f=v_y%3D%5Cfrac%7By_2%7D%7Bt_2%7D)
![4.9=\frac{y_2}{12}](https://tex.z-dn.net/?f=4.9%3D%5Cfrac%7By_2%7D%7B12%7D)
![y_2=58.8\ m](https://tex.z-dn.net/?f=y_2%3D58.8%5C%20m)
b)
<u>Now the distance from the origin:</u>
![s=\sqrt{x_2^2+y_2^2}](https://tex.z-dn.net/?f=s%3D%5Csqrt%7Bx_2%5E2%2By_2%5E2%7D)
![s=\sqrt{(-45.6)^2+(58.8)^2}](https://tex.z-dn.net/?f=s%3D%5Csqrt%7B%28-45.6%29%5E2%2B%2858.8%29%5E2%7D)
![s=74.4097\ m](https://tex.z-dn.net/?f=s%3D74.4097%5C%20m)
Answer:
Correct answer: p₂ : p₁ = 1 : 3
Explanation:
A process that occurs at a constant temperature is called an isothermal process and the formula that applies to this process is:
p · V = const where p is pressure and V is volume
Given : V₂ = 3 V₁
p₁ V₁ = p₂ V₂ ⇒ p₂ / p₁ = V₁ / V₂ ⇒ p₂ / p₁ = V₁ / 3 V₁ ⇒ p₂ / p₁ = 1 / 3
p₂ : p₁ = 1 : 3
which means that when the volume is increased three times the pressure is reduced three times
God is with you!!!
His average speed is 45 miles an hour