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A photon is emitted from a light bulb located 2 m above the floor. The photon travels in a straight line shown with the dashed arrow in the diagram below. The angle among the photon’s path and the wall is 65 degrees. When the photon is at a horizontal distance of 3 m from the wall, its path changes so that the photon moves at an angle of 20 degrees above the horizontal until it strikes a second wall, parallel to the first as shown in the diagram. If the two walls are five meters apart, how far above the floor will the photon strike the second wall?
imagine a spaceship traveling by a stationary space stationg along xx axis with the pilot at x0 and the observer at x0.
A rocket is fired from the ground as a projectile. At the top of its trajectory, at a horizontal distance of 260m from the launch point, the rocket breaks into two pieces: One fragment having1/3 of the mass of the original rocket and the remaining pi..
A 25 turn circular coil of length 5.9 cm produces a magnetic field of magnitude 1.6 mT at its center. Find the current in the loop
In a tractor-pulling contest, a 2500 kg tractor pulls a 5000 kg sledge with an acceleration of 0.61 m/s2. (The tractor rolls on its wheels; the sledge slides.), What is the force of the sledge on the tractor
Light visible to humans consists of electromagnetic waves with wavelengths (in air) in the range 400-700 nm (4.0 10-7 m to 7.0 10-7 m). What are the frequencies of electromagnetic waves that are visible
A plane has a resultant velocity of 550 m/s N of E and airspeed 350 m/s east. Find the velocity of the wind
Positive pressure is used in blood transfusion. Suppose the pressure in a vein is 0.25kPa and the density of blood is 1.04 x 103 kg/m3, how high above the vein must the blood container be placed
A certain centrifuge produces a centripetal acceleration of magnitude exactly 1220g at a point 11.7 cm from the axis of rotation. Find the number of revolutions per second
A spacecraft moving away from Earth emits a 4306 Hz signal. A scientist on Earth measures thesignal to be 4305 Hz. What is the speed of the spacecraft relative to Earth
What is your displacement after running 2.8 {rm km} on Strawberry Fields, 1.4 {rm km} on Penny Lane, and 4.3 {rm km} on Abbey Road.
A car chases a coyote down a road ending in a sheer cliff. What frequency does the coyote hear for the sound reflected from the cliff
There are 5 pairs of plates: A,B, and D are charged plastic plates and C is an electrically neutral copper plate. A is attracted to B, C to A, C to D, B to D, How can you tell if they attract or do not
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