Explanation:
Average velocity indicates direction and can be represented as a negative number when the displacement is in the negative direction. Average speed does not indicate direction and can only be positive or zero.
Answer:
v = 0 and a = 9.8 m/s²
Explanation:
When an object reaches the highest point, its velocity is equal to 0. After reaching the highest point, it starts to decelerate. The acceleration is in the downward direction and it is equal to g i.e. 9.8 m/s².
So, the velocity and acceleration of the ball at the highest point in its path is 0 and 9.8 m/s² downward.
Hence, the correct option is (d).
Answer:
d=3.76 cm
Explanation:
Given that frequency ,f= 4.55 KHz
Speed of sound = 343 m/s
We know that for sound
C= f λ
Where C is the velocity of sound
f is the frequency
λ is the wavelength
So now by putting the values
C= f λ
343= 4550 λ
λ=7.53 cm
We know that for destructive phase the difference in phase is π so the difference in distance will be λ/2.
So distance ,d= λ/2.
d=7.53/2 cm
d=3.76 cm
So they will move at a distance of 3.76 cm to hear minimum intensity of sound.
C. Both because the It physical change is caused by a medical one
Answer:
hence the y - component of the velocity is 50m/s
