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A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. The plate is 5.50 cm thick (vertical dimension) and is covered with a layer of water (n = 1.33) 11.0 cm deep. Calculate the apparent thickness of the plate as viewed from straight above the water. (Assume nearly normal incidence.)
An astronaut weighs 185 lb on earth. What is her weight on the moon, where the acceleration due to gravity is 5.28 ft/s2
the 2lb block is given an initial velocity of 20fts when when it is at a. if the spring has an unstretched length of
A 1.8m -long, 600g rope pulls a 2.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 4.0m/s2, How much force pulls forward on the block of ice
The specific heat of ethanol is 2.44 J/g·°C. How various kilojoules of energy are required to heat 50.0 g of ethanol from -20.0°C to 68.0°C.How far last car travel before momentarily coming to rest.
A girl throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 seconds before reaching the water below. How high is the bridge from the water? How far horizontally does the rock travel before striking the water.
in a conversion from military to peacetime use a missile with a maximum horizontal range of 160 km is being adapted for
A commuter train blows its 200-Hz horn as it approaches a crossing. The speed of sound is 335 m/s. An observer waiting at the crossing receives a frequency of 208 Hz. What is the speed of the train
it has been suggested that rotating cylinders about 12 mi long and 4.6 mi in diameter be placed in space and used as
In a head-on collision, the car stops in 0.23 {rm s} from a speed of 17 {rm m}/{rm s}. The driver has a mass of 77 {rm kg}, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fract..
A centrifuge in a medical laboratory rotates at an angular speed of 2000 rev/ min. Find the constant angular acceleration of the centrifuge
A 115.29 g ice cube at -11°C is placed in an aluminum cup whose initial temperature is 79°C. What is the mass of the cup
Design a decorative "mobile" to consist of a low-mass rod of length 0.46 m suspended from a string so that the rod is horizontal, find the tension in the string that supports the mobile
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