Phys

Question 1

Voltage of a circuit equation is

Answer 1

V = IR

Question 2

Index of refraction equation

Answer 2

n = c/v c is the speed of light in a vacuum, 3.0x10^8 m/s

Question 3

The intensity of the radiation emitted is directly proportional to

Answer 3

The energy of electromagnetic radiation is directly proportional to the number of photons (emitted)

Question 4

How is wavelength related to energy of the light?

Answer 4

wavelength is inversely related to energy of the light. Shorter wavelengths are higher energy and longer wavelengths are lower energy.

Question 5

How is the energy of a photon related to the frequency of the light?

Answer 5

E = hf h is planck’s constant.

Question 6

Pressure differentials equation

Answer 6

ΔP = CO x TPR CO is cardiac output TPR is total peripheral resistance.

Question 7

Work equation

Answer 7

W=P/T (W/s = kJ)

W=ΔKE = ½mv² or ½kx² (elastic)

W= mgh

Question 8

Standard state conditions

Answer 8

298K, 1 atm, 1M conc

Question 9

gamma decay

Answer 9

the emission of photons by the nucleus, atomic mass and number do not change.

Question 10

beta decay

Answer 10

emission of an electron, atomic mass does not change, atomic number increases

Question 11

beta plus decay

Answer 11

emission of a positron, atomic mass does not change, atomic number decreases

Question 12

alpha decay

Answer 12

occurs in large nucleus atoms, atomic mass decreases by 4, atomic number decreases by two

Question 13

The change in entropy is positive or negative when solids change to gas?

Answer 13

positive entropy

Question 14

negative gibbs free energy change means the reaction is

Answer 14

spontaneous

Question 15

A stationary receiver detects a change in frequency of the signal from a jet flying directly away from it at 300 m/s. Which of the following receivers will detect the same change in frequency from a jet moving away at 600 m/s? -A receiver moving at 900 m/s in the opposite direction as the jet -A receiver moving at 300 m/s in the opposite direction as the jet -A stationary receiver -A receiver moving at 300 m/s in the same direction as the jet

Answer 15

A receiver moving at 300 m/s in the same direction as the jet

Question 16

How does voltage difference relate to energy of an electric field?

Answer 16

Ed = ΔV ΔV= W/q = kQ/r

Question 17

Period equation

Answer 17

T = 1/f

Question 18

How are wavelength and frequency related?

Answer 18

λ=c/f

Question 19

An astronomer observes a hydrogen line in the spectrum of a star. The wavelength of hydrogen in the laboratory is 6.563 x 10-7m, but the wavelength in the star’s light is measured at 6.56186 x 10-7m. Which of the following explains this discrepancy? -The star is moving away from Earth. -The star is approaching Earth.

Answer 19

The star is approaching Earth.

Question 20

Photoelectric effect equation relating kinetic energy, energy and work

Answer 20

K= hf-W E=hf=hc/λ

Question 21

Half life equation

Answer 21

n=n0e^ -λt

Question 22

velocity of a wave equation

Answer 22

v=f λ

Question 23

In standing waves: the end of strings is always _______

Answer 23

nodes

Question 24

In standing waves: strings equations are

Answer 24

λ= 2L/n (n is relates to the number of humps) f=nv/2L

Question 25

In standing waves: open pipes equations are

Answer 25

λ=2L/n (n is the number of nodes) f=nv/2L

Question 26

In standing waves: open pipes always end in

Answer 26

Antinodes (open ended)

Question 27

In standing waves: closed pipes equations are

Answer 27

λ=4L/n (n is the number of halves of humps 1,3,5..... always odd) f=nv/4L

Question 28

In standing waves: closed pipes always start with ______ and end with \_\_\_\_\_\_\_

Answer 28

A node, an antinode

Question 29

Electrical Potential Energy equation

Answer 29

V = U/q = E\*d U=q\*ΔV = q\*Ed = k\*Q\*q/r

Question 30

Coulomb’s Law equation

Answer 30

F (kq1q2)/r^2

Question 31

Electric Field energy equation

Answer 31

E=F/q=Q/r^2 Units N/C or V/M

Question 32

What is W_out/W_in represent?

Answer 32

Efficiency of a machine. W_out/W_in = (load)(load distance)/(effort)(effort distance)

Question 33

Describe mechanial advantage

Answer 33

Mechanical advantage is the ratio of magnitudes of the force exerted on an object by a simple machine (F_out) to the force of actually applied on the simple machine (F_in).

Question 34

How does work relate to force?

Answer 34

W = F\*d\*cos(Ø)

Question 35

Elastic Potential energy

Answer 35

U = ½kx²

Question 36

What are the two components of force on inclinded planes?

Answer 36

Fg(parallel) = mg sinø Fg(perpendicular) = mgcosø

Question 37

What is the equation for torque (rotational equalitibrium)

Answer 37

T = rF sinø

Question 38

In sound or pain what is the lowest point of the threshold

Answer 38

sensitivity

Question 39

How is Standard Gibbs Free Energy related to K_eq

Answer 39

ΔG˚ = -RTlnK_eq

Question 40

How is power related to voltage?

Answer 40

P = V²/R = I²R = IV

Question 41

Pressure guage equation

Answer 41

P=pgz Pressure difference in guage is P_g=P-P_atm

Question 42

Buoyant force equation

Answer 42

F_B=p_liquidgv_submerged

Question 43

What is absolute pressure?

Answer 43

Absolute pressure in a fluid due to gravity somewhere below the surface is given by the equation P=P₀+pgz

Question 44

Describe Pascal's Principle

Answer 44

P= F₁/A₁ = F₂/A₂ so A₁d₁=A₂d₂ W=F₁d₁=F₂d₂ A change in the pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fulid and to the walls of the containing vessel.

Question 45

What is capacitance?

Answer 45

Capacitance is the ability to store charge per unit voltage. C = Q/V

Question 46

Rate the speed at which sound travels through from fastest to slowest air, liquid, solid, vaccum

Answer 46

1. solid 2. liquid 3. air doesn't travel in a vaccum

Question 47

Rate the speed at which light travels through these mediums (fastest to slowest) air vaccum water glass

Answer 47

1. vaccum 2. air 3. water 4. glass decreasing speed, increasing index of refraction

Question 48

What is a galvanic cell?

Answer 48

redox reaction has a negative ΔG (spontaneous) there's a salt bridge oxidation occurs at the anode (negative), electrons travel from the anonde to the cathode (positive), where reduction occurs

Question 49

What is an electrolytic cell?

Answer 49

The cell has a positive ΔG, nonspontaneous. Therefore electrial energy is required to start a reaction. electrons travel from the cathode (is negative) to the anode (is positive) emf is negative