Answer:
0.2 m/s^2
Explanation:
initial speed 14m/s
final speed 20m/s
acceleration:
(20m/s - 14m /s) /30s = (6m/s)/30s = 0.2 m/s^2
When they say use energy, you want to use
Total energy = potential energy + kinetic energy = mgh + 1/2mv²
I assume you mean 200 g ball,
so, we know the total distance traveled is going to be 13 - 1.3 = 11.7 m
If the ball just makes it to the top ( 13 m ) , then the ball will stop moving and the kinetic energy will be 0,
therefore, the potential energy at the top will be the total energy of the system = mgh
from this, we say that mgh = 1/2mv² solve for v
<span>
v = sqrt (2gh) = 15.2 m/s </span>
Answer:
A bicycle on the top of the hill has the highest potential energy, and when the bike goes down, it transfers to kinetic because it is moving
Explanation:
yeah
To find the temperature it is necessary to use the expression and concepts related to the ideal gas law.
Mathematically it can be defined as
![PV=nRT](https://tex.z-dn.net/?f=PV%3DnRT)
Where
P = Pressure
V = Volume
n = Number of moles
R = Gas constant
T = Temperature
When the number of moles and volume is constant then the expression can be written as
![\frac{P_1}{T_1}=\frac{P_2}{T_2}](https://tex.z-dn.net/?f=%5Cfrac%7BP_1%7D%7BT_1%7D%3D%5Cfrac%7BP_2%7D%7BT_2%7D)
Or in practical terms for this exercise depending on the final temperature:
![T_2 = \frac{P_2T_1}{P_1}](https://tex.z-dn.net/?f=T_2%20%3D%20%5Cfrac%7BP_2T_1%7D%7BP_1%7D)
Our values are given as
![T_1 = 400K\\P_1 = 1atm\\P_2 = 2atm](https://tex.z-dn.net/?f=T_1%20%3D%20400K%5C%5CP_1%20%3D%201atm%5C%5CP_2%20%3D%202atm)
Replacing
![T_2 = \frac{(2)(400)}{1}\\T_2 = 800K](https://tex.z-dn.net/?f=T_2%20%3D%20%5Cfrac%7B%282%29%28400%29%7D%7B1%7D%5C%5CT_2%20%3D%20800K)
Therefore the final temperature of the gas is 800K
Answer:
D wavelength
Explanation:
The different wavelengths determine the color.