_Award brainliest if helped
By term , we call k Spring Constant.
From multiple choice, the answer is
<span>B. the elastic constant, a number that tells the relative strength of the spring
</span>
Dont really understand what youre asking but switches can be used to turn things on and off.
Answer: positive y direction
Explanation:
we know that direction of velocity is in +x direction
now the magnetic force is in negative z direction
therefore the magnetic force , F = q × ( v × B)
F = ( i × [ - k ] ) direction
F = j direction
so the direction of the magnetic force on the proton is positive y direction.
Answer:
its surface temperature = 54.84 ° C
Explanation:
The density of aluminium
= 2700 kg/m ³
Heat capacity
= 897 J/Kg.K
radius of the sphere (r) = 0.081029 m
= 25 °C
= 124.978 °C
time (t) = 767.276 s
Using the formula :
![\frac{T-T_{ \infty} }{T_i - T_{\infty}}= e^{-\frac{hA}{\rho V c_p}}*t](https://tex.z-dn.net/?f=%5Cfrac%7BT-T_%7B%20%5Cinfty%7D%20%7D%7BT_i%20-%20T_%7B%5Cinfty%7D%7D%3D%20e%5E%7B-%5Cfrac%7BhA%7D%7B%5Crho%20V%20c_p%7D%7D%2At)
where.
![\frac{V}{A}= \frac{r}{3}](https://tex.z-dn.net/?f=%5Cfrac%7BV%7D%7BA%7D%3D%20%5Cfrac%7Br%7D%7B3%7D)
Replacing our values ;we have:
![\frac{T-25 }{124.978 - 25}= e^{-\frac{-103.067*3}{2700*897*0.081029}}*767.276](https://tex.z-dn.net/?f=%5Cfrac%7BT-25%20%7D%7B124.978%20-%2025%7D%3D%20e%5E%7B-%5Cfrac%7B-103.067%2A3%7D%7B2700%2A897%2A0.081029%7D%7D%2A767.276)
![\frac{T-25 }{124.978 - 25}= e^{{-0.001576}*767.276](https://tex.z-dn.net/?f=%5Cfrac%7BT-25%20%7D%7B124.978%20-%2025%7D%3D%20e%5E%7B%7B-0.001576%7D%2A767.276)
![\frac{T-25 }{124.978 - 25}= e^{-1.209}](https://tex.z-dn.net/?f=%5Cfrac%7BT-25%20%7D%7B124.978%20-%2025%7D%3D%20e%5E%7B-1.209%7D)
![\frac{T-25 }{99.978}= 0.2985](https://tex.z-dn.net/?f=%5Cfrac%7BT-25%20%7D%7B99.978%7D%3D%200.2985)
![{T-25 }= 0.2985*{99.978}](https://tex.z-dn.net/?f=%7BT-25%20%7D%3D%200.2985%2A%7B99.978%7D)
![{T-25 }= 29.843433](https://tex.z-dn.net/?f=%7BT-25%20%7D%3D%2029.843433)
![{T= 29.843433+25 }](https://tex.z-dn.net/?f=%7BT%3D%2029.843433%2B25%20%7D)
![{T= 54.843433](https://tex.z-dn.net/?f=%7BT%3D%2054.843433)
T ≅ 54.84 ° C
Therefore, its surface temperature = 54.84 ° C
Answer:
3
Explanation:
the change in velocity is 15, and if I'm right which I may not be you divide your change in velocity by your speed being 5 and get 3. i googled the equation to find acceleration and found a = v/t. this could be absolutely wrong but I hope it helps