Sedimentary rock is formed because it absorbs deposits from the Earth surface and they eventually form a hard clay-like structure.
Alright let's start this off with our basic equation!
Accerlation (
a) = ?
Initial velocity (
V1)= 60 mph = 88 ft/s (because we HAVE to convert mph to ft/s to match time)
Final velocity (
V2) = 0 ft/s because the car stops
Time (
t) = 4 seconds
a =
![\frac{Final velocity - Initial Velocity}{time}](https://tex.z-dn.net/?f=%20%5Cfrac%7BFinal%20velocity%20-%20Initial%20Velocity%7D%7Btime%7D%20)
a =
![\frac{0 - 88}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B0%20-%2088%7D%7B4%7D%20)
a =
![\frac{-88}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-88%7D%7B4%7D%20)
a = -22
Therefore, your acceleration is -22 ft/s² !! Hope this helped and was one of the branliest answers :')
Answer:It started at 20°C, the bras and the iron must b cooled at -150°C.
Explanation:
The formular for linear expansion is given by:
L = Lo + Lo&◇T
Where L = linear dimensions)diameter) after temperature change.
Lo=Original linear dimension
&= Coefficient of thermal expansion for the material.
◇T=Change in temperature.
At some temperature,L(brass)=L(iron)
Lo + Lo&◇T = Lo + Lo&◇T
8.753cm + 8.753cm×(8.7×10^-6C^-1)×◇T=8.753cm+ 8.753cm ×(12.0×10^-6C^-1)×◇T
8.753+(1.636×10^-4)◇T= 8.753+(1.049×10^-4C^-1)◇T
5.87 × 10^-5◇T= 0.010
◇T= 0.010/(5.87×10^-5)
◇T= 170°C
◇T=T1-T2
T= (20 - 170)°C
T= -150°C
1) If the object changes directions with the same speed, it will be changing its velocity, because velocity is a vector, which depends on both magnitude and direction. Speed is just magnitude regardless of direction.
2) Rotational motion.
The magnitude of a vector is the square root of its components squared. When you square a negative number, you will always get a positive number. Its like speed of your car. It will always be positive (or 0) whether you are moving forward or you are in reverse gear or stationary.