Answer:
334 m/s
Explanation:
velocity = frequency x wavelength
velocity = 3.34 x 100 = 334 m/s
Explanation:
You can solve for volume using radius or diameter.
Sphere Volume = 4/3 • π • r³ = ( π •d³)/6
We're given the diameter so let's use that.
Volume = PI * d^3 / 6
Volume = 3.14159 * 3.0^3 / 6
Volume = 3.14159 * 9 / 2
Volume = 14.137 cubic centimeters
Answer: The correct answer is vacuum.
Explanation:
Sound wave is a longitudinal wave in which the particles vibrate parallel to the direction of the motion of the wave. Sound wave consists of compression and rarefaction.
It needs a medium to travel. It can travel in solid, liquid and gas. It cannot travel in vacuum.
Denser the medium, more will be the speed of the wave.
Solid is more denser in comparison to liquid.
The speed of the sound in the solid medium is more in comparison to the liquid. The speed of the sound in liquid is more than the speed in the gas.
Therefore, vacuum is least effective medium for traveling sound waves.
Answer:
Insulator
Explanation:
A body that has relatively few free electrons and offers comparatively great resistance to the movement of free electrons is an <u>INSULATOR</u>.
An insulator is a body that offers resistance to free flow of electrons. Insulators do not allow the passage of electric current. Examples of Insulators are glass, plastic, rubber, dry wood, paper, etc. The opposite of an insulator is a conductor. A conductor is body that allows free flow of electrons. Conductors allow the passage of electric current. Metals are the most common example of conductors such as copper, aluminum, gold, and silver. Other examples of conductors include grahite and human body.
Answer:
120,000 J
Explanation:
The work done by a force applied parallel to an object is given by:
where
F is the magnitude of the force applied
d is the displacement of the object
In this problem:
F = 8000 N is the force exerted by the elevator to lift the passenger
d = 15 m is the displacement of the elevator
Therefore, the work done in this situation is
So, the work done is 120,000 J.