Answer:

Explanation:
Starting from the equation:

First of all, let's multiply by t on both sides:

And then, let's divide by v on both sides:

So, finally

 
        
             
        
        
        
Answer:
t = 4.21x10⁻⁷ s 
Explanation:
The time (t) can be found using the angular velocity (ω):
 
 
<em>Where θ: is the angular displacement = π (since it moves halfway through a complete circle)</em>
We have: 
 
  
<u>Where</u>:       
<em>v: is the tangential speed </em>
<em>r: is the radius</em>
The radius can be found equaling the magnetic force with the centripetal force:

Where:
m: is the mass of the alpha particle = 6.64x10⁻²⁷ kg
q: is the charge of the alpha particle = 2*p (proton) = 2*1.6x10⁻¹⁹C
B: is the magnetic field = 0.155 T
Hence, the time is:

Therefore, the time that takes for an alpha particle to move halfway through a complete circle is 4.21x10⁻⁷ s.
I hope it helps you!     
 
        
             
        
        
        
Answer:
F = 19.1 N
Explanation:
To find the force exerted by the string on the block you use the following formula:
 (1)
  (1)   
k: spring constant = 95.5 N/m
x: displacement of the block from its equilibrium position = 0.200 m
you replace the values of k and x in the equation (1):

Hence, the force exterted on the block is 19.1 N
  
 
        
             
        
        
        
I'm pretty sure what you are trying to ask for is radiative energy, light energy, and electronic energy
<span>Radiative since the microwave is releasing radiation </span>
<span>Light since there is light inside the microwave.</span>
Electronic since it is plugged in and uses electricity.
<span>You can also use sound, but I don't think every microwave makes sound. </span>
        
             
        
        
        
Answer:
Food, clothes, language, and belief