Physics Word Problems with Explanations & Solutions

Violet light of wavelength 425 nm ejects electrons with a maximum kinetic energy of 0.850 eV from a certain metal. What is the binding energy (in electronvolts) of electrons to this metal
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A currentcarrying wire lies in a region where there is an external magnetic field, but there is no magnetic force acting on the wire. How can this be?.
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At a distance of 19 m from a sound source the intensity level is 98 dB. What is the intensity level (in dB) at a point 3.7 m from the source
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Intermixing of particles of two different types of matter on their own is called.
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the semiconductor industry manufactures integrated circuits in large vacuum chambers where the pressure is 1.01010mm1.01010mm of hg. part a what fraction is this of atmospheric pressure? pvc/patpvc/pat
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a contact lens is made of plastic with an index of refraction of 1.50. the lens has an outer radius of curvature of 2.00 cm and an inner radius of curvature of 2.50 cm. what is the focal length of the lens?
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the magnetic forces on oppositely charged particles moving at the same velocity in a given magnetic field are in opposite directions
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the arrow maintains a constant horizontal velocity while its vertical velocity increases steadily because blank .
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potentially dangerous confined spaces such as tanks silos and manholes are purposely designed with quizlet
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when a resistor with resistance r is connected to a 1.50 v flashlight battery, the resistor consumes 0.0625 w of electrical power. (throughout, assume that each battery has negligible internal resistance.) (a) what power does the resistor consume if it is connected to a 12.6 v car battery? assume that r remains constant when the power consumption changes. (b) the resistor is connected to a battery and consumes 5.00 w. what is the voltage of this battery?
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in exercises 2530, express each vector as a product of its length and direction. 2i j2k 9i2j 6k 5k 35i 45k 16i16j16k
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a 1.35 kg falcon is diving at 85.0 m/s at a downward angle of 55 degrees. it catches a 0.950 kg dove from behind in midair. what is their combined speed after impact if the dove's initial velocity was 25 m/s directed horizontally?
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how much impulse stops a 50- kgkg carton sliding at 3.8 m/sm/s when it meets a rough surface? express your answer to two significant figures and include the appropriate units.
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escribe each of the three key processes that led the solar nebula to take the form of a spinning disk. what observational evidence supports this scenario?
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a rifle is fired horizontally and travels 400.0 m. the rifle barrel is 1.90 m from the ground. what speed must the bullet have been traveling at? ignore friction.
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g how long does it take for the thermistor readings to stabilize at the final temperature? find the time constant of the response of the response of the thermistor. based on this information, how often should a change in temperature be measured? does it depend on the range of the temperature change?
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Determine the magnitudes of the two components of f along members ab and ac. set f = 500 n
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If the thickness of an absorber is 1.5 cm and 36.45% of a beam is attenuated by the absorber, what is the half-value layer?
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A 17.5-cm-diameter loop of wire is initially oriented perpendicular to a 1.3-T magnetic field. The loop is rotated so that its plane is parallel to the field direction in 0.15 s .
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From the following statements, identify those that are always true about simple series circuits or always true about simple parallel circuits as shown in (Figure 4). The bulbs in the circuits do not have the same resistance (i.e.,
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p. mickelson, y. m. de escobar, p. anzel, b. desalvo, s. nagel, a. traverso, m. yan, and t. killian, journal of physics b: atomic, molecular and optical physics 42, 235001 (2009).
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jon is in a raft that is 117m from the base of a 56m cliff. what is the angle of depression from the top of the cliff to the raft?
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the red ball in the diagram is chasing after the blue ball; they have the same mass. the speed of the red ball is 3 m/s the speed of the blue ball is 2 m/s. after the collision the red ball rebounds at 2 m/s and the blue ball speeds away at 3 m/s. what was the change in velocity experienced by the red ball during the collision? what was the change in velocity experienced by the blue ball during the collision? normally, momentum is conserved during a collision. however if a huge external force acts during the collision, it may not be. was momentum conserved during this collision or not?
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An inductor has an inductance of 0. 080 h. the voltage across this inductor is 55 v and has a frequency of 650 hz. what is the current in the inductor?
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