Answer:
a soft foam material because soft materials absorb sound better
Answer:
r = 58.44 [m]
Explanation:
To solve this problem we must use the following equation that relates the centripetal acceleration with the tangential velocity and the radius of rotation.
a = v²/r
where:
a = centripetal acceleration = 15.4 [m/s²]
v = tangential speed = 30 [m/s]
r = radius or distance [m]
r = v²/a
r = 30²/15.4
r = 58.44 [m]
Im not sure but it might be the last option: it gives reasons to be believed and trusted
If you illustrate the problem, you will somewhat come up with the figure shown. The missing value is the hypotenuse of the right triangle. Using the pythagorean theorems, the value is determined to be
x = √(0.7^2 + 2.4^2)
x = 2.5 km
2.5 km is the magnitude of the distance. If you want to incorporate the displacement, the answer is reported as
2.5 km, southeast. The direction is determined from the starting point to the endpoint.
An ant can have more momentum than an elephant when the elephant is standing still.
Answer: A
Explanation
The momentum is the quantification of the movement done by an object.
It is found to be dependent on the mass of the object and the velocity with which it is moving.
In the present case, the ant has negligible mass compared to elephant so the momentum can be more for ant only when the velocity with which the elephant is moving tends to be zero.
As the velocity of elephant will be zero, the momentum of elephant will be zero so in this criteria, the moving ant will be having more momentum compared to elephant with zero velocity.
So an elephant with zero velocity means the elephant is standing still.
Thus, the condition in which the ant will be having more momentum compared to elephant is when the elephant stands still.
