Multi-Q: A Review Game

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Welcome to
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Skip Rules
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You will choose questions from the following
six topic areas
CLICK TO VIEW TOPIC AREAS ?
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What do you know about
Units
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What do you know about
Circuits
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What do you know about
Heating
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What do you know about
Household/Misc.
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Units Circuits Heating Household/Misc.
10 10 10 10
20 20 20 20
30 30 30 30
40 40 40 40
50 50 50 50
FINAL QUESTION
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Game Board
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110
Units f o r 1 0 p o i n t s
What is the unit for current?
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10
110 Answer
T h e c o r r e c t a n s w e r i s
Amperes or Amps
10
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11
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120
Units f o r 2 0 p o i n t s
What is the unit for energy?
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13
120 Answer
T h e c o r r e c t a n s w e r i s
Joules
20
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14
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15
130
Units f o r 3 0 p o i n t s
What is the unit for Voltage?
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130 Answer
T h e c o r r e c t a n s w e r i s
Volts (of course)
30
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17
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140
Units f o r 4 0 p o i n t s
What is the unit for power?
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140 Answer
T h e c o r r e c t a n s w e r i s
Watt
40
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20
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150
Units f o r 5 0 p o i n t s
What does the unit for power represent? And what
therefore are the unit of powers units?
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150 Answer
T h e c o r r e c t a n s w e r i s
Amount of energy per unit time, so it is J/s.
50
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23
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24
210
Circuits f o r 1 0 p o i n t s
What is the definition of a circuit?
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210 Answer
T h e c o r r e c t a n s w e r i s
A closed loop along which an electrical current
flows
10
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26
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27
220
Circuits f o r 2 0 p o i n t s
What are the two types of circuits?
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220 Answer
T h e c o r r e c t a n s w e r i s
Series and parallel
20
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29
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30
230
Circuits f o r 3 0 p o i n t s
The diagram below shows two circuits, what type
is each one?
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230 Answer
T h e c o r r e c t a n s w e r i s
30
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32
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240
Circuits f o r 4 0 p o i n t s
What is the formula for Ohms Law?
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240 Answer
T h e c o r r e c t a n s w e r i s
V IR
40
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35
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36
250
Circuits f o r 5 0 p o i n t s
Using Ohms Law, if a lightbulb in a house
provides 5 Ohms of resistance, what current must
be passing through it?
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250 Answer
T h e c o r r e c t a n s w e r i s
V I R So I V/R. In a house, V
110 Volts, so I 110/5 22 Amps
50
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38
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310
Heating f o r 1 0 p o i n t s
What is specific heat?
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40
310 Answer
T h e c o r r e c t a n s w e r i s
The amount of energy you need to raise the
temperature of a substance.
10
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41
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42
320
Heating f o r 2 0 p o i n t s
Which has a higher specific heat, water or
aluminum?
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320 Answer
T h e c o r r e c t a n s w e r i s
Water (it is harder to heat up)
20
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44
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45
330
Heating f o r 3 0 p o i n t s
What formula have we been using for calculating
heat energy?
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330 Answer
T h e c o r r e c t a n s w e r i s
HE mc?T HE heat energy
m mass of substance c specific
heat ?T change in
temperature
30
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47
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48
340
Heating f o r 4 0 p o i n t s
Two Heating are acting on a skydiver a 700 N
force downward due to gravity and a 100 N force
upwards due to air resistance. What is her net
force?
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340 Answer
T h e c o r r e c t a n s w e r i s
Her net force is 600 N downwards.
40
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50
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350
Heating f o r 5 0 p o i n t s
A 100 kg skydiver is being accelerated 10 m/s2
downward due to gravity while air resistance is
pushing up on her with 1000 N of force. What is
the net force on her?
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350 Answer
T h e c o r r e c t a n s w e r i s
The net force on her is zero. From F ma, she
has 100 10 1000 N upwards which balances the
downward force.
50
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53
Return
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54
410
Household/Misc. f o r 1 0 p o i n t s
Name three household appliances that use a lot of
energy.
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410 Answer
T h e c o r r e c t a n s w e r i s
There are of course a lot of correct answers.
Heres what I came up with Hot water heater,
stove, air conditioner, baseboard heater or
radiator, refrigerator
10
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56
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420
Household/Misc. f o r 2 0 p o i n t s
What is a Kilowatt-hour measuring?
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420 Answer
T h e c o r r e c t a n s w e r i s
Energy. A Watt is energy/time, so a watt-hour
would be energy/time time. We can cancel time
and we just have energy.
20
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59
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60
430
Household/Misc. f o r 3 0 p o i n t s
In Boston, when would you expect to have the
highest energy bills and why?
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430 Answer
T h e c o r r e c t a n s w e r i s
January and February (the coldest months). This
is because it takes a lot of energy to heat a
house.
30
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62
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63
440
Household/Misc. f o r 4 0 p o i n t s
What is the formula for power?
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440 Answer
T h e c o r r e c t a n s w e r i s
P IV
40
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65
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66
450
Household/Misc. f o r 5 0 p o i n t s
When heating up water in a stove, some heat
energy is lost and doesnt go into heating the
water. Where could this lost energy go? (Need two
correct answers)
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450 Answer
T h e c o r r e c t a n s w e r i s
Two main losses are to the air and to the pot.
There is also energy lost to evaporation as the
water heats up.
50
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Last Question
T H E F I N A L Q U E S T I O N
If we try to heat 1 kg of water 10 C, with a 400
Watt water heater, how long will it take? The
specific heat of water is about 4000 J/kg/ C.
Assume no heat is lost (100 efficiency).
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Last Answer
T h e c o r r e c t a n s w e r i s
The amount of energy input can be found from
HE mc?T 1
4000 10 40000 J. A Watt (power) is
energy/time. We can rearrange so time
energy/power. We can plug in then time
40000/400 100 seconds between one and two
minutes.
CLICK TO END THE GAME