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10 Physics Unit 4 Pre/Post Quiz

Total questions: 30

Worksheet time: 47mins

Name
Class
Date
1.
What  is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q = m Cp ∆T
b)
Q = m Cp
c)
Q =  ½ m v
d)
m = Q Cp
2.
There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?
a)
Large cup (Trenta)
b)
Small cup (Tall)
c)
Venti
d)
All three are the same temperature so they have same thermal energy
3.
What would be the effect on the particles if more heat is supplied to the system?
a)
They would slow down
b)
They would stop moving
c)
They would speed up
d)
There would be no effect
4.
A sample of iron receives 50.J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of  0.10 J/g°C, what is the mass of the iron sample?
a)
25 g
b)
30 g
c)
20 g
d)
50 g
5.
Using the heat equation, what would the formula look like if we were solving for change in temperature?
a)
Q m = ∆T Cp
b)
Q / (m Cp)  =  ∆T
c)
Q m / Cp  =  ∆T
d)
m c Q  =  ∆T
6.
A high specific heat means...
a)
It heats up quickly with energy added
b)
It requires more energy to change temperature
7.
What is the definition of CONDUCTION?
a)
When heat is transferred from objects like rays of light or electromagnetically.
b)
a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
c)
When heat transfers from objects that are touching.
d)
When heat transfers through the heater or AC in your house.
8.
Warm air is __________ dense than cold air and rises creating convection currents.
a)
more
b)
less
9.
Transfer of thermal energy through "space"
a)
conduction
b)
convection
c)
radiation
10.
What happens when ice cubes melt in a glass?
a)
Heat travels from the ice to the warmer water.
b)
No energy is transferred.
c)
Heat is transferred from the warmer water to the ice cubes.
d)
The water warms up due to the humidity
11.
A material in which electrons are able to move easily
a)
Circuit
b)
Insulator 
c)
Resistance 
d)
Conductor 
12.
The flow/movement of electric charges 
a)
Voltage
b)
Resistance 
c)
Current 
d)
Circuit 
13.
A closed path that electric current follows 
a)
Voltage
b)
Current
c)
Resistance 
d)
Circuit
14.
The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.
a)
Voltage
b)
Current
c)
Resistance
d)
Circuit 
15.
The unit for current is the 
a)
Volt
b)
Ohm
c)
Electron
d)
Amp
16.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
17.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
18.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
19.
As the resistance in a circuit increases, the electric current __________.
a)
increases
b)
decreases
c)
stays the same
20.

What is the speed of light in air?

a)

300 000 000 m/s

b)

300 000 m/s

c)

300 000 000 km/hr

d)

300 m/s

21.
What type of waves does light travel in?
a)
transverse
b)
compression
c)
high and low waves
d)
waves like the ocean
22.
What is this a picture of?
a)
reflection
b)
refraction
23.
The full spectrum of light energy is called the__________
a)
broad spectrum
b)
electromagnetic spectrum
c)
helium spectrum 
d)
natural light spectrum
24.

This ray diagram is for which mirror?

a)

concave

b)

convex

c)

plane

d)

window

25.

In the image, all the rays meet at F, What is F

a)

focal length

b)

focal point

c)

center of curvature

d)

reflection

26.

If light travels from a higher to a lower index of refraction medium the light will

a)

bend away from the vertical axis or may not refract

b)

bend closer to the vertical axis

c)

not bend

d)

answer is not here

27.

Light travels from air (n = 1.000) into an optical fiber. If the angles of incidence and refraction are 22oand 15º respectively. what is the index of refraction inside the fiber? Round off your values to 3 sig. figs.

a)

1.45

b)

1.44

c)

0.69

d)

0.70

28.
When a sound is louder what measurement gets bigger?
a)
Frequency 
b)
Amplitude 
c)
Wavelength 
d)
Crest
29.

The speed of sound depends on these two things:

a)

The type of medium and the temperature of the medium

b)

Speed of the medium and temperature of the medium

c)

Temperature of the medium and sound of the medium

d)

None of the above

30.
The number of wavelengths that pass a point each second
a)
frequency
b)
wavelength
c)
pitch
d)
amplitude

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