Answer:
You can hear your friend because of diffraction of sound waves.
Explanation:
Through diffraction of sound waves, the sound waves can bend around the door spaces and spread out through any small opening on the door to reach you in the other room yet the other person is not in a direct line with you.The wavelength of sound waves in this case are longer enough to bend around the obstacle(door and the indirect path) and spread out to reach your room for you to hear your friend without directly being in line with the door for you to see them.
<h2>Answer:</h2>
<u>Angular velocity of bicycle tire is 15.78 radians per second.</u>
<h3>Explanation:</h3>
Angular velocity is the change in angular speed of an object with respect to time take for change or it is the rate of change of circular motion.
In the given question the circular displacement is 25 rounds around a central point.
The angular displacement is measured in degrees and 1 round is equal to 360 degrees.
25 Rounds = 25 × 360 = 9000 degrees.
Angular velocity = angular displacement /time = 9000/10 = 900 degrees per second.
In SI,angular velocity is represented in radians per second.
So, 1 radian = 57.29 degrees
Angular velocity = 15.78 radians per second
The product of the net force and the time interval for which the the force acts is Law of Momentum
