1000 m/s
You have the wavelength and frequency, you just need to solve for velocity. You can do this by multiplying each side of the equation by frequency.
Answer:
It is A.Heat is transmitted and light is reflected.
It would travel faster through a steel bar, because sound waves travel by vibrating molecules in a medium. In solids, these molecules are spaced closer together, causing sound to travel faster through it. so that means the second fastest medium is liquid and the slowest is gas
Answer:
Melting occurs when a solid is heated and turns into a liquid. The particles in a solid gain enough energy to overcome the bonding forces holding them firmly in place.
During the melting point, the particles start to move about, staying close to their neighboring particles, then move more freely.
Explanation:
As a substance melts and goes from a solid to a liquid state, the kinetic energy of the molecules increases and moves faster, and separates further away from each other. This is why a liquid can fill the shape of its container, where a soild has a fixed shape.
You are given the mass of the book with an initial
height of 0.77m. You are also given the final height of the book, 2m above the
floor. The problem requires you to find the work done on the book. It is said
that work is equal to force times distance. And that force is equal to mass
times acceleration due to gravity.
W=Fd
W=mgd=mgh
W=(1.7kg)(9.8m/s^2)(2m-0.77m)
W=20.49J
<span>The work is equal to 20.49J.</span>
