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An insulating rod of length 14.0 cm is bent into the shape of a semicircle and has a uniform total charge of -7.5 uC. Calculate the magnitude and direction of the electric field at the center of the semicircle arc.
A small body of mass 0.28 kg is undergoing simple harmonic motion of amplitude 4.0 cm and period 0.10 s. What is the maximum value of the force acting on it? If the oscillations are produced by a spring, what is the spring constant?
A 0.390 kg iron horseshoe that is initially at 745 °C is dropped into a bucket containing 24 kg of water at 46 °C. What is the final equilibrium temperature? Overlook any heat transfer to or from the surroundings.
A consumer upset with the latest trend of postal rate increases has decided to try to send letters by balloon even though they may not reach their intended destination
At t=0 a grinding wheel has an angular velocity of 25 rad/s. It has a constant angular acceleration of 35.0 rad/s^2 until a circuit breaker trips at time t = 2.10 s. From then on, it turns by an angle 431 rad as it coasts to a stop at constant ang..
An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 356 Hz tuning fork is held at the open end. Resonance is heard when the piston is at a distan..
On a workday the average decibel level of a busy street is 69 dB, with 102 cars passing a given point every minute. If the number of cars is condensed to 39 cars every minute on a weekend, what is the decibel level of street.
An artillery shell is fired with a minimal velocity of 470m/s at 50o above the horizontal. To clear an avalanche, it explodes on a mountain side 38 s after firing.
Assuming an electron free Earth. Find the force on a single proton just above Earths surface under these conditions. Compare your answer with the weight of the proton.
A car takes 9 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
A rock is thrown vertically upward with a speed of 17.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. A) In how many seconds after being thrown does the rock strike the ground? B) What is the speed of the rock ..
How much work is completed on the box by the applied force
Assuming that the pass was thrown at the optimal 45 ^circ angle, evaluate what was the speed at which the ball left the quarterback's hand?
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