Mobius

Question 1

When a gas, liquid or solid is mechanically disturbed, ____ waves are produced

Answer 1

sound

Question 2

Speed of sound is defined as

Answer 2

frequency x wavelength

Question 3

What happens when the frequency of the driving force equals natural frequency of the system?

Answer 3

Resonance

Question 4

Percieved loudness can be measured as

Answer 4

Logmarithmic

Question 5

When

• sound waves reaching observer perceived to be at a more frequent rate
• Sound waves compressed into shorter distance

The source of sound is moving?

Answer 5

towards the observer

Question 6

When

• sound waves reaching observer perceived to be at a less frequent rate
• Sound waves expanded into longer distance

The source of sound is moving?

Answer 6

away from the observer

Question 7

Frequency greater than range of human hearing

Answer 7

Ultrasound

Question 8

All waves are subject to

Answer 8

diffraction

Question 9

Light can become polarised by

Answer 9

• Reflection
• Refraction
• Scattering

Question 10

Concerning the interaction of light with matter

Answer 10

optics

Question 11

Light rays will travel in a ____ line if they remain in the same medium

Answer 11

straight

Question 12

At the boundary between two media, the light ray can change direction by

Answer 12

reflection or refraction

Question 13

Index of refraction changes for different wavelength.

Answer 13

Snell’s Law

Question 14

Image is:
* virtual
* upright
* magnified

Answer 14

Object at a distance* less* than the focal
length from the lens

Question 15

Virtual image always produced by a ____ lens

Answer 15

concave

Question 16

If the focal length is positive, it is a ____ lens.

Answer 16

convex

Question 17

If the focal length is negative, it is a ____ lens.

Answer 17

concave

Question 18

If the image distance is positive, the image is

Answer 18

real

Question 19

If the image distance is negative, the image is

Answer 19

virtual

Question 20

If the magnification is positive, then the image is

Answer 20

upright

Question 21

If the magnification is negative, then the image is

Answer 21

inverted

Question 22

Contributes only about 20-25% of the refractive power of the eye

Answer 22

Lens

Question 23

Regulates the amount of light entering the eye by controlling the diameter of the pupil

Answer 23

Iris

Question 24

The spreading of light as it passes through an aperature or
passes by the edge of an object

Answer 24

Diffraction

Question 25

Total amount of charge in universe

Answer 25

Constant

Question 26

Electric field lines show

Answer 26

• direction of the force
• indicate its relative magnitude

Question 27

Voltage is defined as

Answer 27

the change in electric potential energy per charge as charge q moves from A to B

potential energy per unit charge

Question 28

If charge moves in the direction it would normally move in the presence of electric field, the potential energy is

Answer 28

decreasing

Question 29

If you move the charge in the opposite direction of the electric force, the potential energy is

Answer 29

increasing

Question 30

Electrical capacitance is

Answer 30

the ability to store charge

Capacitance = charge / volts

Question 31

Electric current is defined as

Answer 31

I = Q/t

Charge flowing per second

Question 32

Anything in the circuit that impedes the current is called

Answer 32

Resistance

Question 33

Ohms Law

Answer 33

V=IR

Question 34

How do you calculate Resistance in series?

Answer 34

Sum of all the resistances

Question 35

How do you sum the resistance in parallel?

Answer 35

Question 36

Power is defined as

Answer 36

Current x Voltage

or Energy / time

Question 37

How do you calculate capacitance in series?

Answer 37

Question 38

How do you calculate capacitance in parallel?

Answer 38

Sum of the capacitances

Question 39

In ____ the magnetic effects of the electrons do not fully cancel each other out, atoms then are like tiny magnets.

Answer 39

ferromagnetic materials