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BJU Physics Final 2 Flashcards | StudBud
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BJU Physics Final 2
The SI unit for Energy is:
What is the charge of an alpha particle?
BJU Physics Final 2
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1
What is the charge of an alpha particle?
0
–1
+1
+2
2
The SI unit for Energy is:
Joule
Pascal
Newton
Watt
3
Biggest challenge in nuclear fusion for energy?
Fuel is expensive
Extremely high temperature/pressure
Produces toxic waste
Too little energy
4
The SI unit for Force is:
Newton
Pascal
Joule
Watt
5
Which factor does NOT affect gravitational potential energy?
Height
Speed
Gravity
Mass
6
Which principle explains why swimmers push water backward to move forward?
Newton’s 3rd Law
Newton’s 1st Law
Law of inertia
Energy conservation
7
A moving object hits a wall and bounces off. This is an example of:
Elastic collision
Explosion
Work-energy theorem
Inelastic collision
8
Why is it reasonable (biblically) to expect consistent laws of physics?
Science invented the laws
God upholds creation consistently
Nature unpredictable
Ancient cultures recorded accurately
9
Main product of nuclear fission in power plants?
Neutrons only
Gamma rays
Oxygen gas
Heat energy
10
In beta decay, a neutron transforms into:
An alpha particle
A proton and a gamma ray
A proton and an electron
A helium nucleus
11
The SI unit for Power is:
Pascal
Watt
Newton
Joule
12
Which particle is found in the nucleus and has no charge?
Positron
Electron
Proton
Neutron
13
The SI unit for pressure is:
Pascal
Joule
Watt
Newton
14
What does impulse depend on?
Distance and time
Force and mass
Mass and acceleration
Force and time
15
Half-life refers to:
Time to completely decay
Time to halve temperature
Time to reach critical mass
Half the nuclei to decay
16
According to the second law of thermodynamics:
Work is 100% efficient
Energy is destroyed
Heat flows from cold to hot
Entropy of a system tends to increase
17
Which of these is not a unit of energy?
Joule
Newton
Calorie
kilowatt-hour
18
The buoyant force on an object in fluid equals:
The object's weight
The weight of fluid displaced
The fluid's weight
The fluid's pressure
19
Nuclear fusion occurs naturally in:
Power lines
Nuclear reactors
Earth's crust
Stars
20
Beneficial use of radiation?
Gamma sterilization of medical tools
Alpha exposure from radon gas
Meltdown in a reactor core
Fallout from nuclear tests
21
Kinetic energy depends on:
Speed and time
Mass and height
Mass and velocity²
Mass and acceleration
22
What does conservation of energy mean?
Energy can be destroyed
Energy increases with speed
Total energy never changes
Only kinetic energy is conserved
23
Which radiation has the greatest penetrating ability?
Neutron
Alpha
Gamma
Beta
24
In an elastic collision:
Kinetic energy and momentum are conserved
Objects stick together
Total momentum is not conserved
Kinetic energy is lost
25
A pendulum swings back and forth. When is kinetic energy greatest?
When released
Mid-swing at bottom
Just before it stops
At the highest point
