I think the answer is <span>4)Magnets attract or repel other magnets.</span>
Answer:
If the wave slows down with no change in frequency, the wavelength decreases.
It’s ultrasonic 100% not much help but I knew the answer
Answer:
x=0.46m, speed=7.9m/s
Explanation:
Using the concept of conservation of energy:
1. kinetic energy of mass m and velocity v: 
2. gravitational potential energy of mass m, grav. acc. g and height h: 
3. potential energy in a spring with spring constant k and displacement from equilibrium x: 
Calculating x:


Calculating the speed:



Solving for
:
