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A soccer player kicks the ball toward a goal that is 28.8 m in front of him. The ball leaves his foot at a speed of 18.7 m/s and an angle of 34.0° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The answer is not 18.7 m/s.)
Two automobiles are equipped with the same single-frequency horn. What is the frequency the horns emit
A length of wire has a radius of 3.00 × 10-3 m and a resistance of 0.200 ?. calculate the density of free electrons in the wire
A horizontal force of 12 N pushes a .5 kg book against a vertical wall. The book is initally at rest. compute the magnitude of the frictional force
question the collision between a hammer and a nail can be considered to be approximately elastic. calculate the kinetic
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.13 m and mass md = 187 kg. What is the final angular velocity of the disk
A thermos contains 151 cm3 of coffee at 85.7 °C. To cool the coffee, you drop two 10.6-g ice cubes into the thermos. What is the final temperature of the coffee in degrees Celsius
As a woman walks, her entire weight is momentarily placed on one heel of her high-heeled shoes. Calculate the pressure exerted on the floor by the heel
In a ballistic pendulum demonstration gone bad, a 0.54g pellet, fired horizontally with kinetic energy 3.40J, how much kinetic energy did the pellet have after emerging from the Styrofoam
you illuminate a slit of width 0.0575 mm with light of wavelength 715 nm and observe the resulting diffraction pattern
The transformer on a utility pole steps the voltage down from 10000 V to 220 V for use in a college science building. At what rate is heat lost in the nonideal transformer
At 20.0°C, a mainly silicon resistor has a resistance of335 Ω, and a tungsten resistor has aresistance of 752 Ω. At this temperature, the siliconresistor has a temperature coefficient of resistivity of−0.070°C−1 and the tungsten resistor has acoef..
A spring with an unstrained length of 0.069 m and a spring constant of 2.7 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring.
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