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While driving in the mountains, you notice that when the freewaygoes steeply downhill, there are emergency exits every few miles.These emergency exits are straight dirt ramps which leave the freeway and are sloped uphill. They are designed to stop trucks andcars that lose their brakes on the downhill stretches of the freeway even if the road is covered in ice. You are curious, so youstop at the next emergency road. You estimate that the road risesat an angle of 14 deg from the horizontal and is about 70 yards(210 ft) long. What is the maximum speed of a truck that you aresure will be stopped by this road, even if the frictional force of the road surface is negligible?
A curved portion of a highway under construction has aradius of 520 m. The legal speed limit of this highway is 100 km/h. At what angle does this portion of the highway have to bebanked so that a car can safely travel at the speed limit when there ..
In a mass spectrometer, a singly ionized 24Mg ion has a mass equal to 3.983 10-26 kg and is accelerated through a 2.60-kV potential difference. Find the radius of curvature of the ion's orbit
A 0.60 kg piece of aluminium at a temperature of 180 C is dumped into 900 mL of water at a temperature of 30 C. What's the final equilibrium temperature
A 0.140-kg baseball is dropped from rest. It has a speed of 1.20 m/s just before it hits the ground. what is the average force exerted by the ground on the ball
How does the density wave model of spiral arms explain that they are brighter than the areas between the arms? The Milky Way is an example of which type of galaxy?
Two examples of chemotherapeutic drugs (drugs used to treat cancer) and their cellular actions are listed below. Describe why each drug could be fatal to a cell.
A cylindrical glass cup has mass m and height h. When the cup is full, it can hold a mass of water equal to 6m. Find the height of water in the cup
A circular window of 30 cm diameter in a submarine can withstand a maximum force of 5.20 * 10^5 N. What is the maxumim depth in a lake
Hammerhead sharks are known to be able to detect magnetic fields. What is the magnetic field strength at the center of the tankdue to the current in the coil
A ball rolls horizontally off a 45-m high cliff with vo=10 m/s. How far from the base of the cliff will it hit the ground, What is the angular acceleration of the tires
Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 134 km long, 39.4 km wide, and 187 m thick.
A force, F(vector) =(2xˆ+3yˆ) N, is applied to an object at a point whose position vector with respect to the pivot point is r(vector) =(4xˆ+4yˆ+4zˆ) m
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