An 17.0 W energy-efficient fluorescent lamp is designed to produce the same illumination as a conventional 60.0 W lamp. (a) How much energy does this lamp save during 100.0 h of use? J (b)...
An 17.0 W energy-efficient fluorescent lamp is designed to produce the same illumination as a conventional 60.0 W lamp. (a) How much energy does this lamp save during 100.0 h of use? J (b)...
I need to know if it is or isn't and the reason why or why not.
a. What force does the Earth exert on the astronaut? b. What is the velocity of the astronaut? c. How long will it take the astronaut to orbit the earth? d. Would your answers to a-c change...
A helicopter propeller blade starts from rest and experiences a constant angular acceleration of 16.5 rad/s2. Find the speed of a point on the blade 2.65 m from the axis of rotation when the blade...
A weather vane initially at rest has a moment of inertia of 0.118 kg · m2 about its axis of rotation. A 35.5 g piece of clay is thrown at the vane and sticks to it at a point 12.5 cm from the axis...
Two parallel slits used for a Young’ s interferometer experiment are 0.5 mm apart. The screen on which, the fringes are projected is 1.5 m from the slits. What is the distance between the fringes...
One arm of a Michelson interferometer utilizing light with λ=500 nm contains a cell 7.50 cm long between plane parallel windows. How many fringe shifts would be observed if all the air were evacuated...
When Michelson interferometer was used to measure the wavelength of monochromatic light, it was found that 400 fringes passed the observing microscope when the movable mirror was displaced 0.088 mm...
Compute the longest wavelength, which can be observed in third order by a transmission diffraction grating with 6000 line/cm. Answer is supposed to be 555.6 nm, please show me how to...
Newton’s rings are observed by reflected light of wavelength 589 nm. The central area is dark and is surrounded by light and dark circles. Find the thickness of the air film at the fourth bright circle...
A sock stuck to the side of a clothes-dryer barrel has a centripetal acceleration of 22 m/s2. If the dryer barrel has a radius of 35 cm, what is the tangential speed of the sock?
What is the tangential speed of a passenger on a Ferris wheel that has a radius of 48 m and rotates once in 23 sec?
An airplane travels 78 m/s as it makes a horizontal circular turn which has a(n) 2.3 km radius. a) What is the magnitude of the resultant force on the 58 kg pilot of this airplane? b) Find...
A girl sits on a tire that is attached to an overhanging tree limb by a rope. The girl’s father pushes her so that her centripetal acceleration is 2.5 m/s2. If the length of the rope is 2.9 m, what...
A young boy swings a yo-yo horizontally above his head so that the yo-yo has a centripetal acceleration of 220 m/s2. If the yo-yo’s string is 0.97 m long, what is the yo-yo’s tangential speed?
An athlete swings a 6.84 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 1.16 m at an angular speed of 0.797 rev/s. a) What is the tangential speed of...
A dog sits 2.9 m from the center of a merry go-round. a) If the dog undergoes a 1.2 m/s^2 centripetal acceleration, what is the dog’s linear speed? b) What is the angular...
An airplane travels 78 m/s as it makes a horizontal circular turn which has a(n) 2.3 km radius. What is the magnitude of the resultant force on the 58 kg pilot of this airplane?
Looking carefully at the table, you estimate that the puck traveled about 5.5 feet across the table in about a quarter of a second. You remember from physics class earlier that week that typically,...
The question has to do with the Schrodinger equation in one dimension and using the propagator. I have gotten an integral but it has to be solved to get the final solution which I can't get. The integral...