Answer:
This is because these metals are used for minting (making) coins.
Answer:
20.7
Explanation:
:0 because basis of the daily occured
If<span> The </span>Sun<span> Went Out, How Long </span>Could<span> Life On </span>Earth<span> Survive? ... (which is actually physically impossible), the </span>Earth would stay<span> warm—at least ... from the planet's core </span>would<span> equal the</span>heat<span> that the </span>Earth<span> radiates into space, ... Photosynthesis </span>would<span> halt immediately, and </span>most<span> plants</span>would<span> die </span>in<span> a few </span>weeks<span>.</span>
1935.5 N is the "net force" acting on a car.
<u>Explanation</u>:
Given that,
Mass of the car is 790 kg.
Velocity of the car is 7 m/s. (v)
It turned around with 20 m. (r)
We know that, Net force = m × a
![\text { Here, acceleration of the car is radial acceleration } a_{\mathrm{rad}}=\frac{v^{2}}{r}](https://tex.z-dn.net/?f=%5Ctext%20%7B%20Here%2C%20acceleration%20of%20the%20car%20is%20radial%20acceleration%20%7D%20a_%7B%5Cmathrm%7Brad%7D%7D%3D%5Cfrac%7Bv%5E%7B2%7D%7D%7Br%7D)
![\mathrm{a}_{\mathrm{rad}}=\frac{7^{2}}{20}](https://tex.z-dn.net/?f=%5Cmathrm%7Ba%7D_%7B%5Cmathrm%7Brad%7D%7D%3D%5Cfrac%7B7%5E%7B2%7D%7D%7B20%7D)
![\mathrm{a}_{\mathrm{rad}}=\frac{49}{20}](https://tex.z-dn.net/?f=%5Cmathrm%7Ba%7D_%7B%5Cmathrm%7Brad%7D%7D%3D%5Cfrac%7B49%7D%7B20%7D)
![a_{\text {rad }}=2.45 \mathrm{m} / \mathrm{s}^{2}](https://tex.z-dn.net/?f=a_%7B%5Ctext%20%7Brad%20%7D%7D%3D2.45%20%5Cmathrm%7Bm%7D%20%2F%20%5Cmathrm%7Bs%7D%5E%7B2%7D)
Now, Net force = m × a
Net force = 790 × 2.45
Net force = 1935.5 N
given,
mass of bicyclist(m)=90Kg
centripetal acceleration(a)=1.5 m/s2
centripetal force(F)=ma= 90×1.5=145 N