Answer:
a) t = 22.5 seconds
b)
c) in the same direction of the car.
Explanation:
First of all, let's convert the speed of the car to m/s:
Now, since the police officer catches the car, we know that their position is the same 750m, so:
Solving for t, we get:
t=22.5s Solved part a)
For the acceleration:
Replacing values and solving for a:
Solved part b)
For the velocity:
Solved part c)
Answer:
The wavelength of the wave is 1.419 cm.
Explanation:
wavelength emitted by the one micro wave = 1.41 cm
beat frequency = 170 M Hz
Let the frequency of the wave is f.
Let the frequency of the other wave is f'.
The wavelength is given by
Answer:
B. Increase the electric force by rubbing the balloon for a longer period of time.
Explanation:
Answer:
Chlorine and Fluorine
Explanation:
When you look at our descriptions of the elements fluorine and chlorine, you will see that they both have seven electrons in their outer shell. That seven-electron trait applies to all of the halogens. They are all just one electron shy of having full shells.
<span>Right-hand rule reveals a connection between the current and the magnetic field lines in the magnetic field. It is also called Ampere`s right hand screw rule. It determines the direction of the magnetic field surrounding a current carrying wire. The thunb points direction of current and fingers point the direction of magnetic lines of force. Answer: C ) a counterclockwise rotation.</span>