Physical Science 1400 Final 2015
molecular motion in a gas is the minimum possible at
0 K
the longest of the following is
0.00001 km
a centimeter is
0.01 m
When 90 kJ is removed from a 2- kg copper bar, its temperature drops from 200 C to 85 C. The specific heat of copper is
0.39 kJ/kg C
a 90 kg llama has an average power output of 80 W. The minimum time the llama can go up a hill 500 m high is
1.5 hr
a total of 4900 J is expanded lifting a 50 kg mass. The mass is raised to a height of
10 m
a 80 dB sound carries more energy than a 40 dB sound by a factor of
10,000
the prefix kilo- stands for
10^3
the prefix giga- stands for
10^9
ocean waves with a period of 10 s are found to have a wavelength of 120 m. their speed is
12 m/s
the kinetic energy of a 900-kg car whose speed is 16.6 m/s is
124 kJ.
the number of atoms in a molecule of Ca3(PO4)2 is
13
a heat engine absorbs heat at 127 C and exhausts heat at 77 C. Its maximum efficiency is
13 percent
the musical note A has a frequency of 220 Hz and its wavelength in seawater is 3.5 m. The speed of sound in seawater is
1540 m/s
the specific heat of water is 4.2 kJ/kg C. The heat needed to warm 8 kg of water from 20 C to 70 C is
1680 kJ
an absolute temperature of 100 K is the same as a celsius temperature of
173 C
a person is 5ft 8.0 in. tall. This is equivalent to
173 cm
the speed of light in a transparent plastic whose index of refraction is 1.5 is
2 x 10^8 m/s
a 400 kg concrete block is 1 m long, 0.6 m wide, and 0.3 m high. its density is
2222 kg/m
the pressure on 100 liters of helium is increased from 100 kPa to 400 kPa. the new volume of the helium is
25 liters
radio amateurs are permitted to communicate on the "10 meter band" What frequency of radio waves corresponds to a wavelength of 10 meters? The speed of radio waves is 3 x 10^8 m/s
3.0 x 10^7 Hz
a medal in a plastic cube whose index of refraction is 1.5 appears to be 20 mm below the upper surface of the cube. The depth of the medal is actually
30 mm
in order to double the average energy of the molecules in a gas at 200 K, its temperature must be changed to
400 K
the speedometer of a European car gives its speed in kilometers per hours. A car traveling 80 km/hr is going how many miles /hr?
50 miles/hr
six flutes playing together produce a 60 dB sound. The number of flutes needed to produce a 70 dB sound is
60
The density of air is 1.3 kg/m^3. The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of
65 kg
what is the linear momentum of a formula 1 car weighing 702 kg and moving at a speed of 100 m/s
70, 200 kg-m/s
the number hydrogen atoms in a molecule of C3H5(OH)3 is
8
a frequency that is not an overtone of the fundamental frequency F is
F/2
PbO
Lead (II) oxide
chemical formula for lithium phosphate
Li3PO4
sodium chloride crystals consists of
Na+ and Cl- ions
KOH
Potassium Hydroxide
which of the following chemical equations is unbalanced
SO2 + H2o >H2SO4
a celsius thermometer and an absolute thermometer are used to measure the temperature of the same gas sample. The readings on the thermometers are respectively Tc and Tk. Which is correct?
Tc is smaller than Tk
the scientific method
a continuing process
at room temperature, chlorine is
a greenish-yellow gas
iodine is an example of
a halogen
maxwell based his theory of electromagnetic waves on the hypothesis that a changing electric field gives rise to
a magnetic field
a magnet does not exert a force on
a stationary electric charge
in a covalent molecule,
adjacent atoms share one or more pairs of electrons
an atom that loses its outer electron or electrons readily is
an active metal
organic compounds
are covalent and contain carbon
a scientific law or theory is valid
as long as it is not contradicted by new experimental findings
elements can be distinguished unambiguously by their
atomic numbers
light of which color has the shortest wavelength
blue
the freezing point of a substance is always lower than its
boiling point
which of the following has the highest power output
both trains have the same power output
people used to think that heat was an actual substance called
caloric
heat transfer in a vacuum
can take place only by radiation
in an isolated system, entropy
cannot decrease
the atomic number of an element determines its
chemical behavior
three methods of heat transfer
conduction convection radiation
a free radical is extremely reactive because it
contains unpaired electrons
the heliocentric model of the solar system was presented by
copernicus
an element that can form an ionic compound with chlorine is
copper
IBr
covalent
NO4
covalent
SiF4
covalent
in each period of the periodic table, metallic activity
decreases to the right
which of the following quantities is independent of the size and shape of an object composed of a given material
density
the maximum possible efficiency of a heat engine
depends on the ratio between the exhaust and intake temperatures
the bending of waves around the edge of an obstacle in their path is an example of
diffraction
if I apply a force of 80N against a wall for 8 hours, but the wall doesn't move, I have
done no work
relative to the stars, the moon and sun seem to move
eastward or westward
three particles that make up an atom
electron proton neutron
what was kepler's main contribution to astronomy and the model of the solar system
ellipsis
when waves go from one place to another, they carry
energy
the property of light waves that leads to the phenomenon of color is
frequency
of the following metals the least active chemically is
gold
a vertical column in the periodic table is called a
group
an inert gas atom
has a filled outer shell
what eventually becomes of the energy of sound waves
heat
the law of gravity
holds everywhere in the universe
the entropy of a body of matter is a measure of
how disordered its molecules are
how many atoms of which elements are present in a molecule of CH3(CH2)2Cl
hydrogen 7 chlorine 1 carbo 3
Thin films of oil an soapy water owe their brilliant colors to a combination of reflection, refraction and
interference
NazS
ionic
chlorine forms Cl- ions. the compound FeCl3 is called
iron (II) chloride
when heat is added to a body of matter, the resulting temperature increase does not depend upon
its shape
when a car is rolling down a hill, its potential energy is converted into
kinetic energy and heat
a halogen atom
lacks one electron from having a filled outer shell
the first law of thermodynamics is the same as the
law of conservation of energy
you are looking at the bottom of a lake 1.2 m deep from a boat. to you the lake seems to be
less than 1.2 m deep
simple machines
lever wheel and axle pulley inclined plane screw wedge
the greater the decibel [db] level of a sound wave the
louder it is
a thermometer calibrated in the celsius scale and a thermometer calibrated in the fahrenheit scale are used to measure the same temperature. the numerical reading on the fahrenheit thermometer
may be smaller or larger than that on the celsius thermometer
the pressure on the bottom of an object inside a liquid is
more than the pressure on its top
if the half-life of a radionuclide is 1 month, is the sample of it completely decayed after 2 months
no
the period of the moons's orbit around the earth is
one month
the period of the earth's orbit around the sun is
one year
a compound whose name ends in -ate always contains
oxygen
in a transverse wave, the individual particles of the medium move
perpendicular to the direction of travel
a moving object does not always have
potential energy
the watt is a unit of
power
who proposed that the earth was in the center of the solar system
ptolemaic
the geocentric model of the solar system was presented by
ptolemy
the sievert is a unit of
radiation dosage
a pencil in a glass of water appears bent. this is an example of
refraction
three types of interference
refraction reflection diffraction
I am holding a book 1 m above a table in the third floor of a building that is 80 m above sea level the potential energy is highest when calculated relative to
sea level
which of the following substances is a homogenous mixture
seawater
each vertical column of the periodic table includes elements with chemical characteristics that are, in general,
similar
of the following kinds of waves, the ones that cannot travel through a vacuum are
sound waves
when an ice skater puts most of her mass along her spin axis, the conservation of angular momentum makes her
spin faster
when a gas is forced into a smaller volume without a change in temperature, its pressure increases because no molecules
strike the container walls more often
which car manufacturer is named after the star cluster pleiades
subaru
what do you call the phase transition from solid directly to gas
sublimation
which of the following sentences contains an accurate and complete measurement?
the length of the block is 5.3 cm
the higher the frequency of a wave,
the shorter its wavelength
the half like of a radionuclide is
the time needed for half a sample to decay
what never changes when two or more objects collide
the total momentum of the objects
sublimation refers to
the vaporization of a solid without first becoming a liquid
which of the following statements is not true of all metals
they are solid a room temperature
one liter of hydrogen gas at atmospheric pressure is allowed to expand to a volume of 3 liters with the temperature held constant. If the average speed of the hydrogen molecules was originally v, their new average speed is
v
the image formed by a diverging lens of a real object is always which of the following
virtual
an example of a wave that is partly longitudinal and partly transverse is a
water wave
the work energy theorem states the W_input= changePE+changeKE+W_output. In this equation W_output, stands for
work done by the object
if 10^5 electrons are added to a neutral object, its charge will be
-1.6 x 10(-14) C
the specific heat of ice is 2.1 kJ/kg C. When 50 kJ of heat is removed from 2 kg of ice initially at -5 C, the final temperature of the ice is
-17 C
at which of the following celsius temperatures will a fahrenheit thermometer show the same reading in degrees
-40 C
a 2-kg book is held 1 m above the floor for 50 s. the work done is
0 J