PHY 121 Practice Test 2
I q t
V W q
V = IR
P = VI, Ploss = I2R,
voltage: Vs = Vp Ns / Np
current: Is = Ip Np / Ns
speed of wave v = f where
Chapter 4: Electricity Principles
In 1998, about 37% of all energy consumed in the USA was consumed in
power plants. When that energy is converted to electric energy and
transmitted to customers, 2/3 of it is lost power plants
Chapter 3: Fossil Fuels
Fossil fuels were the predominant source of fuel in the 20th century, and
they may also be for the 21st century, although their abundance and
availability are both changing.
3.2 Proven and Unproven Reserv
Chapter 2: Energy Principles
2.1-2: Motivation and Scientific Models
Models are simpler than reality to varying degrees. There is often a
tradeoff between easier math and a more accurate model well try to
strike the right balance.
Test 1, PHY121
Energy and Environment
Instructor: Professor Bayram
September 24, 2008
Read the questions carefully and answer for each of the following 28 questions.
Mark your responses to each on the accompanying Scanner Form. Also be sure
to fill in ALL
Practice Test 3 Phy121
1. Fill in the blank:
2. Fill in the blank:
Al 4He + _
Th e- + _
3. The reaction 1H + 2H 3He takes place. Given the masses of the nuclei involved,
determine the energy released.
PHY 121 Test 2 Key
NB: Explanations are provided only for questions requiring quantitative answers.
1. When electric power is transmitted from the generating site to a community, the company tries to keep the electric
current small along the p
Chapter 5: Fossil-Fuel Electric Power Plants
When we convert energy for our use, there are some harmful byproducts.
This chapter talks about power plants and the byproducts that they produce.
5.2: Model of a Fossil-fuel Electri
1) Kilowatt-hours is a unit of
c) both power and energy
e) both work and power
2) What happens when the moon revolves around the earth?
a) Wind energy is formed.
b) Ocean tides are formed.
c) Solar en
Qutign : Which of the chemical symbols below indicating the mass
numberA is suitable for the adjacent nucleus? (All nucleons are visible in
a) 6X + U
l) 8X P 0 n o
Question : Stars produce energy via nuclear reactions taking place in thei
Question 1 of 11
The meaning of an energy gap for the United States is
PHY 121 practice Test 2
I q t
V W q
V = IR
P = VI, P = I2R, P = V2/R
voltage: Vs = V
Chapter 1: Energy and Society
1. Energy and Society
1769 James Watt patented the steam engine
1859 Drake discovered petroleum in PA
1941 Grand Coulee Dam completed
We are dependent on energy. For example, we need energy to move. We use