Frequency is given in units of Hertz (Hz) and is defined as the number of cycles per second. The sound wave has 30,000 cycles per second, so its frequency is 30,000Hz.
This is more conveniently expressed as 30kHz, where the k indicates a multiplier of 1,000.
Answer:
Answer:
The velocity of the ball when it reaches its highest point is 0
Explanation:
The velocity of the ball when it reaches its highest point is 0
Once the ball is tossed into the air, as it goes up, the initial velocity with which it was thrown, reduces, as the motion of the ball is hindered by several forces such as gravity and air resistance. This slows down the velocity of the ball, up until it reaches a point, where the upwards velocity of the ball becomes zero. at this point, the ball begins to fall back to the ground.
For the answer to the question above,
220 m/s
<span>mass of the bullet * velocity of the bullet = mass of the gun * velocity of the gun </span>
<span>0.005 kg * v = 0.52 kg * 2.1 m/s </span>
<span>-> v = (0.52kg * 2.1 m/s) / 0.005 kg = 218.4 m/s
</span>I hope my answer helped you. Have a nice day!
Answer:
15 seconds
Explanation:
If car was moving at 20m/s for 3 sec.
if car traveled 100m = 15 sec total
Given:
ρ = 13.6 x 10³ kg/m³, density of mercury
W = 6.0 N, weight of the mercury sample
g = 9.81 m/s², acceleration due to gravity.
Let V = the volume of the sample.
Then
W = ρVg
or
V = W/(ρg)
= (6.0 N)/[(13.6 x 10³ kg/m³)*(9.81 m/s²)]
= 4.4972 x 10⁻⁵ m³
Answer: The volume is 44.972 x 10⁻⁶ m³
