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Drunk driving. A newspaper article on drunk driving cited data on traffic deaths in Rhode Island: "Forty-two percent of all fatalities occurred on Friday, Saturday, and Sunday, apparently because of increased drinking on the weekends." What percent of the week do Friday, Saturday, and Sunday make up? Are you surprised that 42% of fatalities occur on those days?
A charge of -3.25nC is placed at the origin of a xy-coordinate system, and a charge of 2.40nC is placed on the y axis at y = 3.50cm. Find the magnitude of this force
A wooden block with equal sides of 4 cm is floating in water. If the density of the block is half the density of water, how far is it from the water to the top of the block?
The dew point at a location 50 km 20° south of west of a recording station is 4°C higher than at the station. what is the local change in dew point at the station
A gas is enclosed in a cylinder fitted with a light frictionless piston and maintained at atmospheric pressure. Calculate the change in internal energy of the gas
Suppose that at the top of its parabolic trajectory a projectile has a horizontal speed Uox. What is the radius of the circle
A 150-kg block slides across ice and comes to a stop in 12.50m. Coefficient of kinetic friction among ice and block is 1.800, what is the frictional force acting on the block? What was the speed of the block before it stopped?
One hectare is defined as 10^4 m^2. (Meaning 10 to the 4th power etc) One acre is 4x10^4 ft^2. How many acres are in one hectare
The best sprinters can run a 100 m in 10.0 s. A 72.0 kg sprinter accelerates uniformly for the first 53.0 m to reach top speed, What is the average horizontal component of force exerted on his feet by the ground during acceleration
A 11kg hammer strikes a nail at a velocity of 8.7m/s and comes to rest in a time interval of 7.4ms, What is the impulse of the given nail
A football quaterback runs 15.0 m staright down the playing field in 2.50s. what are the average velocities for the three intervals
A dentist uses a small mirror of radius 44mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is magnification of the image.
A 50 g horizontal copper rod has a length of 1.0 m. Calculate the minimum current in the rod so that it will float in a horizontal magnetic field of 2.0 T
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