Exam 3 PSC1121

4 journeys to and from equilibrium

1 full cycle of oscillation means

1. Greater applied force= greater compression 2. Spring has internal restoring force 3. Further spring is pulled/pushed= stronger restoring force

3 important things to consider regarding applied forces and spring responses:

2,000 larger

A proton is ____________ than an electron.

oscillates along the x-axis.

Every time we see a physical system with (i) a position-dependent force, like: F = − k x , or (ii) a squared-distance potential energy function, like S P E = 1/2 k x ^ 2 , then we know that the physical system

Conduction

Heat transport from hot sand at the beach to the soles of your feet is accomplished primarily by

electromagnetic radiation.

Heat transport from sun to Earth is accomplished primarily by

beats between outgoing and incoming signals

How police catch speeders

True

In the kinetic theory of gases, the average kinetic energy of the gas molecules is proportional to the temperature of the gas in the Kelvin scale.

Changes in GPE

James Prescott Joule measured the mechanical equivalent of heat energy by correlating temperature measurements to

Electrons cannot move from one object to another by friction.

Not true

4.184 J

One regular calorie, defined as the energy that raises the temperature of one gram of H2O from 14.5℃ to 15.5℃, is equivalent to

melting/freezing

Q=mLf

heating/cooling

Q=mc\Delta T

Temperature

The average kinetic energy of the molecules of the gas is proportional to this macroscopic measure:

Wavelength

The distance from trough to trough on a periodic wave is called its

calorie

The heat needed to warm one gram of liquid H2O one Kelvin is called a

frequency

The number of waves per second that pass by a given point in space is otherwise known as

where wavelets form a new interference pattern.

Waves approach a large solid barrier with two openings in it. The waves interact with the openings,

particles of the material vibrating to and fro across their equilibrium position

We know that waves in a material medium, like air or water, do not cause an overall motion in the material. The motion, however, is in

False

When two waves meet and undergo complete destructive interference at a point in space and time, the momentum and energy of both waves disappears and cannot propagate any further.

The one with the lowest specific heat (c).

Which substance is, gram for gram, easiest to heat up by one Kelvin?

The one with the highest specific heat (c).

Which substance is, gram for gram, hardest to heat up by one Kelvin?

the wavelength is still the same, even if the amplitude varies.

You study a train of waves in the ocean from the end of a long jetty. Even though some of the waves are bigger, big enough to surf on, they seem to come with the same spacing, from crest to crest. This means that

super deep trough

trough + trough

flat water

wave + trough

super wave

wave + wave