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48 Cards in this Set
- Front
- Back
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The amount of work done against friction to slide a box depends most on the________ |
Distance the box is moved. |
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An object weighing 15 newtons is lifted from the ground to a height of .22 meter. What equation would you use for a problem like this? |
Potential energy PE=mgh |
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As an object falls freely, the kinetic energy of the object_______ |
Increases |
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When a neutral metal sphere is charged by contact with a positively charged glass rod, the sphere _______ |
loses electrons |
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Moving 2.5x10^-6 coulomb of charge from point A to point B in an electric field requires 6.3x10^-4 joule of work. What equation would you use for this? |
V=J/C J=joules C=Coulomb |
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What is the frequency of a sound wave in air (at STP) whose wavelength is .92 m? |
360 |
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What characteristic do red, yellow, and violet light have in common? |
velocity |
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An object is formed 8cm from a converging lens with a focal length of 5 cm. How would you describe the image formed? |
Real, and larger than the object |
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A fire truck with a siren blaring is approaches a student. How does the sound heard by the driver of the truck compare to the sound that the student hears? |
The student hears a higher frequency than the driver |
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A 0.8000-kg block of lead is heated in boiling water until its temperature is the same as the water. The lead is then dropped into 0.2500 kg of water at 12.00 C. When the temperature of both the lead and the and the water reaches 20 C, how much heat is gained by the water if no heat is gained by the water if no heat is lost to the surroundings. What kind of equation would you use for this problem? |
Q=mc/_\T |
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What is the best reason heat is identified as a form of energy? |
Heat can be converted to a work equivalent |
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Two charges separated by a distance d exert a force on each other. What is the force between the same charges if the distance is increased to 2d |
1/4F |
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What is the potential difference between a current with 40 (ohms) and .30 A? What equation would you use for this problem? |
I=V/R R*I=R 40*.30=12 |
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What voltage would be recorded with 2 A and 100 (ohms)? What equation would you use? |
I=V/R R*I=V 100*2=200 |
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Which spectral line of light has the highest frequency and can be considered as having the most energy? |
The violet line |
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When white light passes through a prism, it breaks up into colors as represented. Which statement best explains this phenomenon? |
The component colors have different angles of incidence. |
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In any experiment, the on factor that is being tested is the _____ |
Variable |
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The set of steps used to solve problems in an orderly way is _______ |
The scientific method |
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When the photoelectric effect is observed, the likelihood of electrons being emitted from a surface increases, as which characteristic of incident light increases? |
Frequency |
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A metal ball has the momentum of 12 kg m/s. Is the ball has a velocity of 3 m/s, what is its mass? And what equation would you use? |
P=mv P/v=m 12/3=m 4 kg=m |
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A ball has a momentum of 15-kg m/s. It strikes a motionless second ball and stops. If the second ball has a mass of 5 kg, what is the magnitude of its velocity after the collision? |
P=mv P/m=v 15/5=v 3=v |
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A rolling cart has a velocity of 2 m/s and a mass of 8 kg. A rock with no horizontal momentum and a mass of 2 kg is placed into the cart as it rolls past. What is the final velocity and what equation would you use to find it? |
m1v1=m2v2 m2=8+2 (8)(2)=(10)(v2) 16/10=v2 1.6=v2 |
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A ball is thrown into the air. As it rises, there is an increase in its ______ |
Potential Energy |
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Car B has the same mass as Car A but is going twice as fast. If the same constant force brings both cars to a stop, how far will Car B travel coming to rest as compared to the distance Car A traveled? |
Four times as far
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Mechanical energy is associated with _____ |
Motion |
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Electromagnetic energy is associated with ______ |
The motion of electric charges |
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Heat energy is associated with ______ |
The internal motion of particles of matter. |
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Chemical energy _______ |
Energy that bonds atoms or ions together |
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Potential energy and kinetic energy are forms of what kind of energy? |
Mechanical |
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If you hold one end of a metal nail against a piece of ice, the end in your hand soon becomes cold. Why is this? |
Temperature flows from the ice to your hand |
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Heat energy from the sun reaches the earth by ______ |
Radiation |
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And ostrich with a mass of 131 kg is running with a velocity of 14 m/s. Find the momentum of the ostrich and state the equation you would use to find this |
P=mv P=(131)(14) P=1834 |
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What velocity must a car with a mass of 1410 kg have in order to have the same momentum as a 2390 kg truck traveling 30 m/s and what equation would you use to find this? |
m1v1=m2v2 (2390)(30)=(1410)(v2) 71700/1410=v2 50.85 m/s=v2 |
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A barefoot field-goal kicker imparts a speed of 20 m/s to a football initially at rest. If the football has a mass of 0.51 kg and the time of contact with the ball is 0.03 s, what is the magnitude of the force exerted by the ball on the kicker's foot and how would you find this? |
F=ma a=/_\V/T a=(20-0)/.03 a=20/.03 a=666.66 F=(.51)(666.66) |
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Take east as the positive direction. An 80 kg fisherman jumps from a dock into a 135 kg rowboat at rest on the west side of the dock. If the velocity of the fisherman is 5.2 m/s to the west as he leaves the dock, what is the final velocity of the fisherman and the boat and how would you find this? |
Vf=m1v1/m1+m2 Vf=(80)(5.2)/80+135 Vf=416/215 Vf=-1.93 |
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A current is flowing clockwise around a loop on your desk. What would be the direction of the resulting magnetic field inside the loop? |
Downward |
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A typical color television draws about 2.9 A when connected to a 119 V source. What is the effective resistance of the TV set and how would you find it? |
I=V/R R*I=V R(2.9)=119 R=119/2.9 R=41.03 |
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How will a current change if the voltage in a circuit is held constant while the resistance doubles? |
The current will drop to half of its original value |
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Several light bulbs are connected in a series across a 110 V source of emf. What is the equivalent resistance if the current in the circuit is 1 A and how would you find this? |
I=V/R R*I=V R(1)=110 R=110/1 R=110 |
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If each light bulb has a resistance of 10 (Ohms), how many light bulbs are in the circuit if the total resistance is 110 (Ohms)? |
110/10 11 |
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Silver, Copper, and Mercury is are examples of good electric |
conductors |
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In our everyday environment, diffraction of much more evident for sound waves than for light waves. Why is this so? |
We see light more often than we hear sound in our everyday environment.
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If a bell rings inside a bell jar, we can no longer hear it when the air is pumped out, but we can still see it. What differences in the properties of sound and light does this indicate? |
Sound needs a material medium for its transmission, while light does not. |
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If someone asked you to prove that electromagnetic waves travel in a vacuum, what would you say? |
We see stars and planets in the sky. |
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As the types of electromagnetic radiation increases in intensity, how do the wavelength, frequency, and photon energy change? |
Wavelength - Decreases Frequency - Increases Photon Energy - Increases |
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What do the dark vertical bands indicate on a spectrum? |
Frequencies of light that were absorbed by the atoms in the gas |
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Suppose a particular atom has only two allowable electron orbits. How many different wavelength photons (Spectral Lines) would result from all electron transitions in this atom? |
Three |
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An isotope has the same value of |
atomic number |
