Topic 3.4:Temperature and heat

Topic 3.4 
Temperature and heat
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Cette leçon contient 30 diapositives, avec quiz interactifs, diapositives de texte et 1 vidéo.

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Topic 3.4 
Temperature and heat

Slide 1 - Diapositive

the arrow of gravitational force is drawn starting at....

A
top of the object
B
centre of mass
C
bottom of the object
D
side of the object

Slide 2 - Quiz

There are 2 Forces working on an object. the resulting force is 0N
What type of motion does the object have?
A
constant speed
B
acceleration
C
deceleration
D
spinning around

Slide 3 - Quiz

Dog A is pulling with a force of 60 N and dog B is pulling in the opposite direction with a force of 75 N
What is the resultant force?
A
15 Newton to dog A
B
75 Newton to dog B
C
60 Newton to dog A
D
15 Newton to dog B

Slide 4 - Quiz

The unit for speed is
A
s
B
v
C
m/s
D
km/min

Slide 5 - Quiz

v=s/t, so time can be calculated with the following formula
A
t= v/s time = speed / distance
B
t = s/v time = distance /speed
C
t = s x v time = distance * speed
D
t = s + v time = distance + speed

Slide 6 - Quiz

Convert 100 km/h to m/s?
A
27,8 m/s
B
360 m/s
C
103,6 m/s
D
96,4 m/s

Slide 7 - Quiz

3.4 temperature and heat
Learning goals
1. you can describe the concept of temperature, the different scales it is measured in and the corresponding units
2. you can convert the temperature from Celsius to Kelvin and backwards
3. you can describe the concept of heat and the units it is measured in
4. you can distinguish the difference between temperature and heat
5. you can describe the concept of heat combustion and use it to calculate the amount of energy released during combustion

Slide 8 - Diapositive

Heat
Total amount of energy of the molecules that are present in a piece of matter




The bigger the energy, the bigger the heat

Slide 9 - Diapositive

Temperature
indication of average amount of kinetic energy (movement) per molecule

Shown in Degrees Celsius

Symbol T

Slide 10 - Diapositive

At what temperature does water boil?
A
0 degrees Celsius
B
75 degrees Celsius
C
100 degrees Celsius
D
150 degrees Celsius

Slide 11 - Quiz

At what temperature does water go from liquid to solid?
A
10 degrees Celsius
B
-10 degrees Celsius
C
100 degrees Celsius
D
0 degrees Celsius

Slide 12 - Quiz

Johanie is at a traffic light. As soon as it hits green, he starts to speed up on his bike. He accelerates with 5 m/s2.
What is his speed after 4 seconds?

A
9 m/s
B
1 m/s
C
20 m/s
D
1,25 m/s

Slide 13 - Quiz

convert 18 m/s to km/h
A
14,4 km/h
B
65 km/h
C
5 km/h
D
21,6 km/h

Slide 14 - Quiz

Temperature in Celsius
based on water

0 degrees Celsius , water going from solid to liquid or back

100 degrees Celsius, water going from liquid to gas or back

Slide 15 - Diapositive

Temperature in Kelvin
Temperature can also be measured in Kelvin (no degrees)

-273 degrees Celsius = 0 Kelvin
0 degrees Celsius = 273 Kelvin

1 degrees up in Celsius=
1 Kelvin up

Slide 16 - Diapositive

How many Kelvin is 75 degrees Celsius
A
-198 Kelvin
B
0,27 Kelvin
C
3,64 Kelvin
D
348 Kelvin

Slide 17 - Quiz

The gravitational force on an object is 440 N, WHat is his mass?
A
about 350 kg
B
about 45 kg
C
about 449,8 kg
D
about 882 kg

Slide 18 - Quiz

Slide 19 - Vidéo

Name another unit for temperature

Slide 20 - Question ouverte

15 degrees Celsius is .....
A
288 Kelvin
B
258 Kelvin
C
4095 Kelvin
D
18,2 Kelvin

Slide 21 - Quiz

How far did this object travel after 16 seconds?
A
500 km
B
1000 km
C
0 km
D
300 km

Slide 22 - Quiz

Heat and chemical reactions
exothermic reaction --> heat is released


Slide 23 - Diapositive

Heat of combustion
the amount of energy that is released when you burn 1 kg of that type of fuel

Gasoline: 36 . 10^6 J/kg
Wood: 16 . 10^6 J/kg

Slide 24 - Diapositive

I want to draw a force with a magnitude of 1200 N.
The scale must be 1 cm = 60 N
How large should the arrow (vector) be?
A
20 cm
B
5 cm
C
10 cm
D
12 cm

Slide 25 - Quiz

Gasoline has a heat of combustion of 32 MJ/kg
How much energy wil you get by burning 0,5 kg?
A
64 MJ
B
32 MJ
C
16 MJ
D
32,5 MJ

Slide 26 - Quiz

A car is accelerating for 3 seconds, increasing by 20 m/s every second. What is his final speed?
A
23 m/s
B
60 m/s
C
6,7 m/s
D
17 m/s

Slide 27 - Quiz

What kind of movement will happen in this situation?
A
constant speed to the left
B
constant speed to the right
C
acceleration to the left
D
acceleration to the right

Slide 28 - Quiz

What kind of movement wil happen here
A
constant speed downwards
B
constant speed upwards
C
deceleration downwards
D
deceleration upwards

Slide 29 - Quiz

On an object the following forces are acting:
50 N to the right
20 N upwards
75 N to the left
20 N downwards
What type of motion will happen?
A
acceleration upwards
B
acceleration to the right
C
acceleration downwards
D
acceleration to the left

Slide 30 - Quiz