IB Physics Jeopardy SL (Topics 1-4)

Topic 1 (Uncertainty)

100

What is the unit of charge?

Coulomb

200

How many significant figures are in the number?

1200.

4

300

What is the difference between precision and accuracy? 

Accuracy: difference between measurement and true value.

Precision: is the variation of the measurement done repeatedly with the same method/device.

400

Calculate the value of the following: 

(2.79 ± 0.02) m / (1.35 ±  0.01) s

(2.07 ±  0.03) m/s 

500

Find the vector sum of two perpendicular forces F₁ 4.3 N [Left] and F₂ 5.8N [Up]

Magnitude : 7.2N

                                            Direction: 53^° 

Topic 2 (Mechanics)

100

Find the displacement of this graph:

30

200

Inertia is defined by which of Newton's Laws?

Newton's First Law; Every object will remain in a state of rest or in uniform motion in a straight line (constant velocity) unless acted upon by a net (unbalanced) force. This is really a restatement of Galileo's principle of inertia. 

300

A ball is launched with an initial vertical velocity component of 20m⋅s− and initial horizontal velocity component of 25m⋅s−. 

Determine how much time elapses until the maximum height is reached. 

2.0s; 

v_y=u_y+a_yt

400

A person pushes a car of mass 800.kg from rest through a distance of  20 m on a horizontal surface using a force of 400N. The car reaches a velocity of 3.0m⋅s. 

1. Determine the thermal energy dissipated due to the resistive forces.
2. Determine the efficiency of the work done.

1. 8 kJ - 3.6 kJ = 4.4 kJ

2. 45%

500

A video recording of a golf shot shows that the club head is travelling horizontally at a speed of 18m⋅s−1 when it strikes the ball at rest and the ball moves away horizontally with a speed of 30.m⋅s−1. The mass of the ball is 46g, and the mass of the club head is 400.g.

1. Determine the velocity of the club head after impact.
2. Using your answer to part 1 of this question, determine the energy dissipation during the interaction.

1. 14.55m⋅s−1 

2. −1.76J 

Topic 3 (Thermal)

100

What is the boiling point of water?

100C^° 

200

What is the difference between conduction, convection, and radiation? 

1. Conduction: energy transfer through particle-particle collisions and movement.
2. Convection: energy transfer through the distribution and movement of a fluid (liquid or gas).
3. Radiation: energy transfer through electromagnetic radiation that each body emits.

300

Two ice cubes of 15g each are taken from a freezer at −12∘C and placed in a cup containing 250g of water at room temperature, say 22∘C. Determine the final temperature of the mixture.

10.4

400

What is the relationship between Pressure and Temperature, Temperature and Volume, and Pressure and Volume, respectively? (must define all three). 

p ∝ 1/V; p₁v₁ = p₂v₂

V ∝ T(K); V₁/T(K)₁ = V₂/T(K)₂

p ∝ T(K); p₁/T(K)₁ = p₂ /T(K)₂

500

A weather balloon is filled with some 7.0×10²⁵ hydrogen molecules, and at 18C^∘ the balloon has a volume of 14m³. Find the pressure inside the balloon.

20,000 pascal, or 0.2 atm

Topic 4 (Waves)

100

A mass on the end of a spring oscillates horizontally with a maximum displacement of 4.0 cm. The largest acceleration of the mass is 2.0 m⋅s−2. There are no energy losses. What is the magnitude of the acceleration of the mass when it has a displacement of 1.0 cm from its equilibrium point?

.50 m⋅s−2 

200

Which has a higher wavelength on the electromagnetic spectrum, infared or microwaves?

Infared

300

Unpolarized light of intensity I₀ passes through a polarizer and then through an analyzer whose axis is rotated 30∘ from that of the polarizer. Determine the intensity of the light between polarizer and analyzer and the intensity of the light exiting the analyzer in terms of I₀.

3I₀/8

400

During a double slit experiment with slit separation 0.20mm, with screen distance 1.50m from the slits, a coherent monochromatic light source produces an interference pattern with an average separation between dark fringes is 0.45cm. Determine the wavelength and approximate color that was used.

6.0×10−7m; approximately orange.

500

A loudspeaker is placed near the open end of a pipe of length 400mm that is closed at the other end. The smallest resonant frequency is 215Hz. Determine the speed of sound in the pipe and calculate the next larger resonant frequency. Note that this is a common experiment used to measure the speed of sound, where a signal generator is used to slowly sweep upward from small to greater frequencies and those that resonate the air column are used (along with column length) to calculate c.

645 Hz

Random!

100

Simple Harmonic Motion employs what type of motion?

Isochronous

200

What is the unit for luminous intensity?

Candela, cd

300

Which has a higher specific latent heat, Copper or Water?

Copper = 207

Water= 334

400

What are coherent waves?

Two waves are said to be coherent if they have a constant phase difference and they are the same frequency.

500

What forces do real gases have that ideal gases don't?

Inter-particle forces (London or Van der Waals).