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When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.8 in 0.13 How far does the pike move during this strike?
A wheel is rotating freely at angular speed 920 rev/min on a shaft whose rotational inertia is negligible. What fraction of the original rotational kinetic energy is lost
A typical adult ear has a surface area of 1.45 × 10-3 m2. The sound intensity during a normal conversation is about 2.49 × 10-6 W/m2 at the listener's ear. How much power is intercepted by the ear
A 5.0-kg projectile is fired over level ground with a velocity of 200.0 m/s at an angle of 30.0 ° above the horizontal
A ball of mass 0.40 kg moving at 180 m/s east strikes a second ball, initially at rest of mass 0.500 kg. What is the final velocity of the second ball
Suppose the emf of a coil rotating in a magnetic field is zero at t = 0 , and increases to its first peak at t = 0.08 ms. What is the period of the output
An ac series circuit has an impedance of 178 ? , and the phase angle between the current and the voltage of the generator is ? = -74°, find the capacitive reactance XC or the inductive reactance XL, whichever is appropriate
An outboard motor for a boat is rated at 36 hp h. If it can move a particular boat at a steady speed of 30 km/h , what is the total force resisting the motion of the boat
A glass rod that has been charged to + 17.0nC touches a metal sphere. Afterward, the rod's charge is + 9.0nC
An object with a mass of 500g is attached to a spring. The system is moving in simple harmonic motion with an amplitude of 0.020m, What is the frequency of the system
Two converging lens with a focal lengths of 10 cm are separated by 10 cm. What is the position of the final image
select the quantity that has changed(velocity or speed) for a car that travels north at 88 km/h and then turns east while continuing to move at 88 km/h. define your answer.
The cable pulls horizontally on the box, and a 50.30 bag of gravel rests on top of the box. The coefficients of friction between the box and roof are shown. The system is not moving. Find out the friction force on the bag of gravel.
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