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The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
Two photons have different frequencies f1 and f2 . If the ratio of their momenta is 22.5, what is the ratio of their frequencies
The work function of an element is 3.2 eV. Photons of a certain energy are found to eject electrons with a kinetic energy of 2 eV. What is the speed of the ejected electrons
An FM radio station transmits at a frequency of 80 MHz and a total power of 65 kW. How many photons does this station emit each second
One mole of an ideal diatomic gas is expanded at constant temperature from a pressure of two atmospheres, What are the final temperature and pressure of the gas
Suppose two highly precise, identical clocks are synchronized and one clock is placed on the North Pole, how much will the clocks differ in time
One thousand kilocalories of heat are added to three moles of a monatomic ideal gas as it expands, What was the temperature change for this gas
Given an ordinary cylindrical glass with a volume of one half liter and filled completely to the top with water at room temperature (20C), What would be the vapor pressure for this fluid
An object is initially placed on the optical axis 21.2 cm to the left of a convex lens that has a focal length of 13.7 cm. what is the new image distance
A camera has a lens with a focal length of 25.6 cm. how far from the film should the lens be placed
A space vehicle is traveling at 3760 km/h relative to Earth when the exhausted rocket motor is disengaged, What is the speed (in km/h) of the command module relative to Earth just after the separation
The electric potential at a position located a distance of 18.0 mm from a positive point charge of 7.60×10-9C, Calculate the value of the second charge
To finance her community college education, Joanna takes out a Stafford loan for $4500. How much will she pay
A sound wave of frequency 171 Hz has an intensity of 3.29 ?W/m2. What is the amplitude of the air oscillations caused by this wave
An 83 kg fullback moving east with a speed of 5.4 m/s is tackled by a 96 kg opponent running west at 3.8 m/s, find the velocity of the players immediately after the tackle
An object (it could be the crown that Archimedes had studied) made of gold and copper has a mass of 5.00 kg. determine the the volume percentage of each metal
A bacterium (mass = 2 × 10-15 kg) in the blood is moving at 0.28 m/s. What is the de Broglie wavelegth of this bacterium
A photon of red light (wavelength = 710 nm) and a Ping-Pong ball (mass = 2.10 × 10-3 kg) have the same momentum. At what speed is the ball moving
A golf ball strikes a hard, smooth floor at an angle of 24.7 ° and, as the drawing shows, rebounds at the same angle. compute the magnitude of the impulse applied to the golf ball
Two loudspeakers in a plane, 5 m apart, are playing the same frequency. If you stand 14 m in front of the plane of the speakers, What is the frequency of the sound
Use of basic skills:attending, listening, probing and basic empathy
Perceptions of Deviance, Crime, Victims, and Justice
What is epistemology and what are the two general epistemological orientations in sociology? How does one's epistemological perspective impact his or her research
One of the areas explored in chapter two(ignore) is the difference between quantitative and qualitative research. For this topic, you can either further explore the differences between the two ap
Would be a counterclaim to the claim that child abuse has been increasing over the last fifty years