A watchman is searching the bottom of a pool at night. He shines a narrow beam from a flashlight at a height of 1.3 m above the pool, onto the surface a distance of 2.6 m from the pool wall. If the pool is 2 m deep, how far from the wall does the spot of the beam hit the pool floor? Answer in m to 1 decimal point

A watchman is searching the bottom of a pool at night. He shines a narrow beam from a flashlight at a height of 1.3 m above the pool, onto the surface a distance of 2.6 m from the pool wall. If the pool is 2 m deep, how far from the wall does the spot of the beam hit the pool floor? Answer in m to 1 decimal point

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter3: Vectors

Section: Chapter Questions

Problem 3.61AP: Lei A = 60.0 cm at 270 measured from the horizontal. Let B = 80.0 cm at some angle . (a) Find the...

See similar textbooks

Similar questions

A Fill in the missing entries in Table P38.70. Table P38.70
On a clear day a tiny fish hides under water (nwater =1.38) from an osprey under a circular leaf that has a diameter of 0.215 m. What is the maximum depth below the leaf that the fish can be so that it could not be spotted by the ospray? h Provide your answer in meters with a precision of four places after the decimal.
When a man stands near the edge of an empty drainage ditch of depth 2.80 m, he can barely see the boundary between the opposite wall and bottom of the ditch as in Figure (a) shown below. The distance from his eyes to the ground is h = 1.88 m. (Assume 0 = 27.6°.) IA h d a b Ө m 0 2.80 m (a) What is the horizontal distance d from the man to the edge of the drainage ditch? d = (b) After the drainage ditch is filled with water as in Figure (b) shown above, what is the maximum distance x the man can stand from the edge and still see the same boundary? X = m
A statue 4.23 meters high is standing on a base of 4.90 meters high. If an observer's eye is 1.93 meters above the ground, how far should he stand from the base so the angle subtended by the statue is maximum?
You are working at your university swimming center. The athletic department decides that it would like to install a flag pole of height 10.0 m at the south end of one of the outdoor pools, which lies along a north-south axis. The pool is 3.09 m deep and the flag pole is to be installed 4.35 m from the south edge of the pool, midway along the length of the south edge. (a) Your supervisor knows of your expertise in physics and asks you to determine the distance (in m) of the shadow of the tip of the flag pole on the bottom of the pool from the south wall of the pool on a summer day when the Sun appears directly south and at an angle of 65.0° above the horizon. m
A student is looking at the antenna on the roof of a building. The student is at a horizontal distance of 85.0 m from the building and the angle his eyes make is 38.0°, as shown. The student's eyes are 1.60 m above the ground. At what height is the antenna above the ground (from base of the building to the top of antenna)? 38.0° 85.0 m O 61.5 m O 39.7 m O 68.0 m O 55.6 m O 44.3 m
a telecommunication's tower can send a signal up to 90 miles from its location. you are currently situated at 85 miles east and 50 miles south from the tower. what is the closest distance you have to travel horizontally to receive signal from the tower?
A high fountain of water is located at the center of a circular pool as shown in figure below. Not wishing to get his feet wet, a student walks around the pool and measures its circumference to be 12.0 m. Next, the student stands at the edge of the pool and uses a protractor to gauge the angle of elevation at the bottom of the fountain to be 55.0°. How high is the fountain? 55.0°
I need help with part a and b of this question! Thanks! For an independent study project, you design an experiment to measure the speed of light. You propose to bounce laser light off a mirror that is 51.0 km due east and have it detected by a light sensor that is 129 m due south of the laser. The first problem is to orient the mirror so that the laser light reflects off the mirror and into the light sensor. (a) Determine the angle that the normal to the mirror should make with respect to due west. ANS:____º Since you can read your protractor only so accurately, the mirror is slightly misaligned and the actual angle between the normal to the mirror and due west exceeds the desired amount by 0.003°. Determine how far south you need to move the light sensor in order to detect the reflected laser light. ANS:_____ m
The speed of light changes when it goes from ethyl alcohol (nea = 1.31) to carbon tetra- chloride (nct = 1.641). What is the ratio vct of the speeds?
ray of light strikes a flat block of glass at an incidence angle of ?1 = 38.6°. The glass is 2.00 cm thick and has an index of refraction that equals ng = 1.52. a.)What is the angle of refraction, ?2, that describes the light ray after it enters the glass from above? (Enter your answer in degrees to at least 2 decimal places.) b.) With what angle of incidence, ?3, does the ray approach the interface at the bottom of the glass? (Enter your answer in degrees to at least 2 decimal places.) c.) With what angle of refraction, ?4, does the ray emerge from the bottom of the glass? (Enter your answer in degrees to at least 1 decimal place.) d.) The distance d separates the twice-bent ray from the path it would have taken without the glass in the way. What is this distance (in cm)? e.) At what speed (in m/s) does the light travel within the glass? f.) How many nanoseconds does the light take to pass through the glass along the angled path shown here?
A light beam is shone into a mystery material. The light beam has an incident angle of 38 degrees and a refracted angle of 24 degrees. If n1 = 1.00, what is n2?