Answer:
Explanation:
From the given information:
the car's momentum = momentum of the truck
∴
(a) 816 kg × v = 2650 kg × 16.0 km/h
v = (2650 kg × 16.0 km/h) / 816 kg
v = 51.96 km/hr
(b) 816 kg × v = 9080 kg × 16.0 km/h
v = (9080 kg × 16.0 km/h) / 816 kg
v = 178.04 km/hr
The central force acting on the electron as it revolves in a circular orbit is
.
The given parameters;
- <em>speed of electron, v = 2.2 x 10⁶ m/s</em>
- <em>radius of the circle, r = 4.63 x 10⁻¹¹ m</em>
<em />
The central force acting on the electron as it revolves in a circular orbit is calculated as follows;
![F = \frac{M_e v^2}{r} \\\\](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7BM_e%20v%5E2%7D%7Br%7D%20%5C%5C%5C%5C)
where;
is mass of electron = 9.11 x 10⁻³¹ kg
![F = \frac{(9.11 \times 10^{-31}) \times(2.2\times 10^6)^2 }{4.63 \times 10^{-11}} \\\\F = 9.52 \times 10^{-8} \ N](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7B%289.11%20%5Ctimes%2010%5E%7B-31%7D%29%20%5Ctimes%282.2%5Ctimes%2010%5E6%29%5E2%20%7D%7B4.63%20%5Ctimes%2010%5E%7B-11%7D%7D%20%5C%5C%5C%5CF%20%3D%209.52%20%5Ctimes%2010%5E%7B-8%7D%20%5C%20N)
Thus, the central force acting on the electron as it revolves in a circular orbit is
.
Learn more about centripetal force here:brainly.com/question/20905151
To begin with, we can use the formula that links frequency, wavelength and velocity.
Because you already have the wavelength and the frequency, you just need to solve for velocity. You can do this by multiplying each side of the equation by frequency.
Therefore, 400 x 2.5 = 1000m/s.
Hope this helps :)