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A uniform thin wire has a length L = pi R and is bent into a semicircular arc of radius R. If the wire starts at (x, y) = (R, 0) and curves counterclockwise to x, y) = (-R, 0). what is the y coordinate of its center of mass?
The fastest pitched baseball was clocked at 46 m/s. Find what force did the pitcher exert on the ball during this record-setting pitch? (You need to find the acceleration to use Newton's second law. F=ma)
In an EM wave traveling west, the B field oscillates vertically and has a frequency of 84.0 kHz and an rms strength of 6.30×10^?9T.
In the LC circuit below the capacitor is charged to its maximum 48 μC while the switch S is open. The switch is closed at t = 0. Find the energy stored in the inductor at t=T/4, where T is the period of circuit oscillations.
In a series R-L-C circuit, R = 320? , XC = 260? and XL = 600? . The average power consumed in the resistor is 60.0W. What is the rms voltage of the source
On a very muddy football field, a 100 linebacker tackles a 75 halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.9 north's and the halfback is sliding with a velocity of 7.9 east's.
A 75-kg piece of metal has specific heat 430 J/kg°C and is initially at 950°C. To cool it down, it is dunked into 710 kg of oil that has a temperature of 32°C and specific heat of 2700 J/kg°C. Assuming that heat flows only between the oil and the m..
The Concorde travelled 8000 km among two places in North America and Europe at an average speed of 375 m/s. What is the total dissimilarity in time between two similar atomic clocks, one on the airplane and one at rest on Earth through a one-way trip..
By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 2.80 m/s and v2 = 1.85 m/s. As the plate falls, its momentum has only a vertical component, and no component parallel to the flo..
A car (m = 1,300 kg) is traveling at an initial speed of 14 m/s. It then slows to a stop over a distance of 90 m due to a force from the brakes. How much work is done on the car
Assume you are a medieval knight attacking a castle with a cannon. The ball leaves the cannon with a speed of 35.3 m/s. What is the time of flight of the cannon ball
A stone is thrown into the air with an initial velocity of 50 m/s at 37degress to the horizontal, find the total horizontal distance it travels
at a mail sorting facility packages slide down a ramp but are stopped part way down the ramp so that they can be
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