car starts from rest
![v_i = 0](https://tex.z-dn.net/?f=v_i%20%3D%200)
final speed attained by the car is
![v_f = 5 m/s](https://tex.z-dn.net/?f=v_f%20%3D%205%20m%2Fs)
acceleration of the car will be
![a = 3.6 m/s^2](https://tex.z-dn.net/?f=a%20%3D%203.6%20m%2Fs%5E2)
now the time to reach this final speed will be
![t = \frac{v_f - v_i}{a}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7Bv_f%20-%20v_i%7D%7Ba%7D)
![t = \frac{5 - 0}{3.6}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B5%20-%200%7D%7B3.6%7D)
![t = 1.39 s](https://tex.z-dn.net/?f=t%20%3D%201.39%20s)
so it required 1.39 s to reach this final speed
<h2>
Answers:</h2>
The energy
of a photon is given by the following formula:
(1)
Where:
is the Planck constant
is the frequency
Now, the frequency has an inverse relation with the wavelength
:
(2)
Where
is the speed of light in vacuum
Substituting (2) in (1):
(3)
<u>Knowing this, let's begin with the answers:
</u>
<h2>(a) Microwave: 50.00 cm
</h2><h2 />
For
<h2>(b) Visible: 500 nm
</h2><h2 />
For
<h2>(c) X-ray: 0.5 nm
</h2><h2 />
For
As we can see, as the wavelength decreases, the energy increases.
<h2>
Oxygen is moving at 483.63 m/s</h2>
Explanation:
Kinetic energy = 0.5 x Mass x Velocity²
Kinetic energy = 6.21 x 10⁻²¹ J
Mass = 5.31 x 10⁻²⁶ kg
Substituting
Kinetic energy = 0.5 x Mass x Velocity²
6.21 x 10⁻²¹ = 0.5 x 5.31 x 10⁻²⁶ x Velocity²
Velocity² = 2.34 x 10⁵
Velocity = 483.63 m/s
Oxygen is moving at 483.63 m/s
Answer:
a
Explanation:
as the copper wire is very dangerous so now if these two thing happens then it would easily help the current flows through it so it might be a little bit easy for the current to flow through it